CN104563943A

CN104563943A - Reducing sealing type hydraulic-driving flashboard blowout preventer

Info

Publication number: CN104563943A
Application number: CN201310535970.7A
Authority: CN
Inventors: 杨桂青; 张树平; 张振军; 卞康群
Original assignee: JIANGSU GUIXIN PETROLEUM EQUIPMENT Co Ltd
Current assignee: JIANGSU GUIXIN PETROLEUM EQUIPMENT Co Ltd
Priority date: 2013-10-28
Filing date: 2013-10-28
Publication date: 2015-04-29

Abstract

The invention relates to a reducing sealing type hydraulic-driving flashboard blowout preventer, which comprises a shell, a hydraulic cylinder, a reducing flashboard assembly, a side door, side door bolts and an oil port connector, and the reducing sealing type hydraulic-driving flashboard blowout preventer also comprises a sealing mechanism; the reducing flashboard assembly comprises a reducing flashboard body and sealing elements; the sealing elements include a top rubber core and a front reducing rubber core, and the front reducing rubber core comprises a reducing rubber body, a plurality of iron parts with a specially-shaped cam structure, four iron spacers, two movable rods and two connecting rods; the iron parts with the specially-shaped cam structure, the four iron spacers, the two movable rods, the two connecting rods and rubber are vulcanized in a mold in one step to form a whole body. The reducing sealing type hydraulic-driving flashboard blowout preventer can seal different specifications of pipe columns by means of only one set of reducing flashboard assembly, thus realizing reducing sealing, and moreover, the reducing sealing type hydraulic-driving flashboard blowout preventer has a simple structure, and is convenient to mount; thereby the production efficiency of workers is increased, and the occurrence of new potential safety hazards is prevented.

Description

The hydraulic flashboard blowout preventer of reducing sealing

Technical field

The present invention relates to a kind of well controlled blowout-proof device---hydraulic flashboard blowout preventer, the hydraulic flashboard blowout preventer of especially reducing sealing.

Background technology

Hydraulic flashboard blowout preventer is the well controlled blowout-proof device that oilfield downhole operation uses, a kind of because taking precautions against gas blowout accident and designing, can the device of timely safe closing well after well kick occurs; At present, hydraulic flashboard blowout preventer adopts hydraulic-driven, when lower oil tube, Oil/gas Well generation overflow or blowout or other spy oestrus condition time, hydraulic flashboard blowout preventer can realize closed Oil/gas Well well.Hydraulic flashboard blowout preventer comprises housing, hydraulic cylinder, flashboard assembly, side door, side door bolt, port connection, and hydraulic flashboard blowout preventer also comprises sealing mechanism, hydraulic flashboard blowout preventer is bilateral symmetry, and namely its left side structure is identical with the specification framework of right side structure and symmetrical, housing comprises body and flange arrangement, body is rectangular structure, the center of body is the main through hole of hollow circular configuration, flange arrangement comprises neck flange and flange, housing there are two flange arrangements, two flange arrangements lay respectively at the both sides of body, the intermediate throughholes of two flange arrangement interlinks with main through hole respectively, the center line of flange arrangement and the center line of main through hole are on the same line, housing has two or more side through hole, side through hole communicates with main through hole respectively, its side through hole combines the structure forming one or more pairs of side through hole in pairs, a same side through hole to side through hole is positioned at main through hole side, another side through hole is positioned at main through hole opposite side, the center line of two side through hole on the same line and with the vertical and intersectant centerline of main through hole, hydraulic cylinder comprises cylinder barrel and cylinder cap, piston and piston rod, screw mandrel, cylinder barrel bolt and sealing device, piston rod is fixedly connected on the side of piston, the outer end of piston rod is pin thread structure, its top is plane, be referred to as to push up plane, the central axis of top plane and piston, the two sides be connected with top plane are plane and side plane, its two side plane respectively with top plane orthogonal, and be parallel to each other, the vertical distance that its two side plane arrives the center line of piston is respectively equal, between side plane with piston rod main body, fluted structure is connected, groove structure open at both ends, its groove structure comprises groove bottom and groove side, its groove bottom is parallel with side plane, its two grooves side is parallel to each other, and it is vertical with groove bottom, the top plane parallel of groove side and piston rod, piston rod there is the blind hole of connection wire rod, the blind hole of connection wire rod and the central through hole of piston interlink, the blind hole of connection wire rod and the central through hole of piston and piston rod, the center line of piston on the same line, internal thread is had in the central through hole of piston and the blind hole of connection wire rod that links together, screw mandrel comprises body and step, body is circular pin, the step of the outwardly annular of intermediate peripheral wall of body, its step separates leading portion and back segment screw mandrel body, the external diameter of leading portion is less than the external diameter of back segment, the leading portion of body there is male thread.Complement one another between the side through hole of hydraulic cylinder, side door and housing, the quantity correspondence of the side through hole of hydraulic cylinder, side door and housing is identical, hydraulic cylinder and being connected between side door and housing.Hydraulic cylinder and syndeton between side door and housing, namely piston rod packs in the hole in the middle of side door, piston is inserted in cylinder barrel, internal thread in the central through hole of the male thread on the leading portion of the body of screw mandrel and piston and the blind hole of the connection wire rod of piston rod that links together screws and is connected, cylinder cap sealing shroud connects the back segment of the body of screw mandrel, the sealing device of hydraulic cylinder comprises sealing between the back segment of the body of cylinder cap and screw mandrel and the sealing between cylinder cap and cylinder barrel and the sealing between side door and cylinder barrel, sealing between piston rod and side door, sealing between piston rod and side door is divided into two parts, a part is sealed well pressure, a part is the oil pressure that sealing hydraulic control produces, twice sealing mechanism is between this two department, for making the sealing at this place very reliable, there is the sealing ring of multiplet, and the auxiliary seal of middle O-ring seals, side door itself is connected with housing by side door bolt, side door is positioned at outside the side through hole of housing, side door is covered on side through hole, and cylinder cap and cylinder barrel are fixed together by cylinder barrel bolt and side door, and the sealing between side door and cylinder barrel adopts y-shaped ring to realize two way seal.The sealing mechanism of hydraulic flashboard blowout preventer comprises the sealing of sealing between side door and housing and oil circuit.The respective independently oil circuit hole of this distribution in vivo many of housing, independently oil circuit hole is corresponding with side through hole for it, one is to corresponding two the oil circuit holes of side through hole, it independently has a collar extension and two oil circuit apertures in oil circuit hole, collar extension is positioned on this outside, two oil circuit apertures lay respectively at the outside of same two side through hole to side through hole of housing, the oil circuit aperture in the oil circuit hole of the body of housing and the corresponding connection of oil circuit ostium of side door, the collar extension in the oil circuit hole of the body of its housing is fixedly connected with port connection; There are two oil circuit apertures in the outside of side through hole, and its two oil circuits aperture belongs to two oil circuit holes respectively, and its two oil circuit holes are respectively the oil circuit hole of control piston advance and the oil circuit hole of control piston retrogressing; Have an oil circuit hole in cylinder cap body, cylinder cap body is pierced in all side of being connected corresponding to cylinder barrel inside cylinder cap, its oil circuit hole, and passes from the centre inside cylinder cap; Cylinder barrel has an oil circuit hole, the oil circuit aperture, all sides in cylinder cap oil circuit hole connects with an oil circuit orifice sealing in the oil circuit hole of cylinder barrel, the oil circuit aperture of the centre of the inner side in the oil circuit hole of cylinder cap is led in cylinder barrel, the oil circuit hole of two break-through side doors is had in its side door, the oil circuit hole advanced with another oil circuit aperture in the oil circuit hole of cylinder barrel and the control piston of housing respectively in the two oil circuit apertures in an oil circuit hole of side door seals and interlinks, and the oil circuit hole that another oil circuit hole of side door and the control piston of housing retreat seals and interlinks and lead in cylinder barrel; Each parts are successively installed connection according to program respectively and are completed, and have rubber seal rings for seal to connect, form the oil circuit of independent completion sealing between its oil circuit aperture mutually directly connected.The sealing of oil circuit comprises the sealing of the oil circuit hole collar extension of sealing between the oil circuit aperture that mutually directly connects and port connection and housing.Hydraulic flashboard blowout preventer equipment flashboard assembly.Flashboard assembly comprises gate panel body and seal, gate panel body there is box structure, box structure matches with the pin thread structure of the outer end of piston rod, it is convex straight trough, it is made up of inside groove and water jacket, namely there is convex straight trough in the outside of gate panel body, horizontal break-through pedestal, its groove bottom is plane, convex straight trough comprises inside groove and water jacket, the width of its inside groove is greater than the width of water jacket, vertical distance between two groove sides of water jacket is identical with the vertical distance between two groove bottom of two groove structures at the top of the pin thread structure of the outer end of piston rod, the width of the groove structure groove bottom of the pin thread structure of the outer end of its piston rod is identical with the width of the groove side of the water jacket of the box structure of gate panel body, the pin thread structure top plane of the outer end of piston rod is identical to the degree of depth of the inside groove of the vertical distance of groove side adjacent with top plane of groove structure and the box structure of gate panel body, vertical distance between two side planes of the pin thread structure of the outer end of piston rod is equal with the vertical distance between two groove sides of the inside groove of the convex straight trough of the box structure of gate panel body, gate panel body complements one another with seal and is connected.Seal comprises top glue core, anterior glue core, and top glue core also claims top sealing, and anterior glue core also claims front sealing.Hydraulic flashboard blowout preventer is bilateral symmetry, housing is one or more pairs of side through hole structures, in its side through hole, flashboard assembly is installed, and mutually coincide in the box structure that the pin thread structure of its piston rod injects on corresponding gate panel body, flashboard assembly in same a pair left and right side through hole of housing complements one another, between two relatively, the flashboard assembly that two complements one another forms one group of flashboard assembly; Side through hole is corresponding identical with the quantity of flashboard assembly.Flashboard assembly has two classes, and a class flashboard assembly is full seal structure, is referred to as blind rams assembly, another kind of flashboard assembly is half seal structure, be referred to as half envelope flashboard assembly, half envelope flashboard assembly comprise half envelope gate panel body, partly seal anterior glue core and top glue core, partly seal anterior glue core and comprise agent structure and external ear, agent structure is the structure of semi-toroidal shape, the external ear forming symmetrical bulk shape is protruded at the left and right two ends of its agent structure respectively to outside, thus, the head of its agent structure and external ear are interconnected to form the head of the anterior glue core of half envelope, and partly sealing anterior glue core has two heads, the gate panel body of half envelope there is hatch frame, hatch frame is positioned at the front portion of the gate panel body of half envelope, hatch frame with partly seal anterior glue core and adapt to, match, hatch frame comprises two opening sheets, the anteriomedial of opening sheet has the opening of arc, its opening both sides are respectively forward plane, two forward plane is crossing with the inner circumferential wall of opening respectively to be connected, two forward plane at grade, the arc core line of the inner circumferential wall of opening and the middle tangent plane of half gate panel body sealed are at grade, forward plane is mutually vertical with the middle tangent plane of gate panel body, opening sheet has inner face, the arc core line of the inner circumferential wall of opening is vertical with inner face, its inner face is vertical with forward plane, the inner face of two opening sheets is parallel to each other relatively, two opening sheets are respectively top opening sheet and bottom opening sheet, and the arc core line of the inner circumferential wall of two openings on the same line, the inner circumferential wall of arc is had to connect between the inner face of two opening sheets, the inner circumferential wall of its arc is referred to as center peripheral wall surfaces, the arc core line of the arc core line of its center peripheral wall surfaces and the inner circumferential wall of opening on the same line, the diameter of its center peripheral wall surfaces is greater than the diameter of the inner circumferential wall of opening, center peripheral wall surfaces is crossing with the inner face of two opening sheets respectively to be connected, there is inner plane the both sides of center peripheral wall surfaces respectively, two inner planes at grade, inner plane is parallel with forward plane, inner plane is crossing with center peripheral wall surfaces to be connected, inner plane intersects vertically with the inner face of opening sheet and is connected, arc seal groove is arranged at the top of the gate panel body of half envelope, arc seal groove comprises intermediate seal groove and side seal groove, two side seal grooves lay respectively at the both sides of intermediate seal groove, intermediate seal groove is connected with both sides sealing groove respectively, the degree of depth of intermediate seal groove is less than the degree of depth of side seal groove, the groove bottom of intermediate seal groove is parallel with the groove bottom of side seal groove, the groove bottom of intermediate seal groove is parallel with inner face, the groove bottom of side seal groove intersects vertically with inner plane and is connected, the vertical distance of the inner face that the vertical distance of the groove bottom of the side seal groove inner face of opening sheet is on earth the less than top opening sheet inner face of opening sheet on earth, make the groove bottom of side seal groove, a breach is formed between the inner face of inner plane and top opening sheet, inner plane has connection partly seal the blind hole of anterior glue core, its blind hole center line is vertical with inner plane, the groove bottom of side seal groove has the blind hole connecting top glue core, and its blind hole center line is vertical with the groove bottom of side seal groove, and two blind holes intersections communicate, the bottom opening sheet of the gate panel body of half envelope there are centering guiding oblique angle and centering gathering sill, bottom opening sheet has the water jacket connecting centering guiding oblique angle, centering guiding oblique angle is fixedly connected on water jacket, and the fixed connection structure of centering guiding oblique angle and water jacket adopts welded construction or adopts headless screw syndeton, when adopting headless screw syndeton, its bottom opening sheet there are two through holes, the center line of its through hole is vertical with the inner face on bottom opening sheet, two through hole communicates with water jacket respectively, its through hole is female thread structure, there are two internal thread holes matching corresponding with the through hole of two on bottom opening sheet at oblique angle to centering guiding, is fastenedly connected bottom opening sheet and centering guiding oblique angle respectively by headless screw, and centering guiding oblique angle is fixedly connected on water jacket.Like this, partly seal gate panel body that anterior glue core and half seals to cooperatively interact and be connected, it partly seals anterior glue core pressure and is sandwiched between the top opening sheet of the hatch frame of the gate panel body of half envelope and bottom opening sheet, and the connection that the connecting rod that the colloid of the anterior glue core of half envelope is stretched out in the outer end partly sealing the connecting rod of anterior glue core namely injects the gate panel body of half envelope completely is partly sealed in the blind hole of anterior glue core; Top glue core pressure is embedding to be sandwiched in the arc seal groove at the top of the gate panel body of half envelope, and the connecting rod stretching out the colloid of top glue core of its top glue core injects in the blind hole of connection top glue core of the gate panel body of half envelope completely; The connecting rod of its top glue core injects in the hole of the outer end of the connecting rod of anterior reducing glue core.Like this, its top glue core and partly seal anterior glue core and be attached on the gate panel body of half envelope respectively, Jiao Xin two, top cooperatively interacts with two heads partly sealing anterior glue core respectively and links together, and Jiao Xin two, top cooperatively interacts with the external ear partly sealing anterior glue core two ends respectively and links together and form confined space.Thus, form the flashboard assembly of half envelope.When hydraulic flashboard blowout preventer equipment blind rams assembly, it is the hydraulic flashboard blowout preventer of full seal structure; When hydraulic flashboard blowout preventer equipment half envelope flashboard assembly, it is the hydraulic flashboard blowout preventer of half seal structure; When hydraulic flashboard blowout preventer not only equipped full envelope but also equipment half envelope flashboard assembly time, it be full envelope and the hydraulic flashboard blowout preventer partly sealing the structure combined; Hydraulic flashboard blowout preventer is according to the hydraulic flashboard blowout preventer not being all single disc of equipped flashboard assembly quantity or combination preventer, combination preventer comprises the hydraulic flashboard blowout preventer of double disc and the hydraulic flashboard blowout preventer of many flashboards, when hydraulic flashboard blowout preventer equips one group of flashboard assembly, it is the hydraulic flashboard blowout preventer of single disc; When hydraulic flashboard blowout preventer equips two groups of flashboard assemblies, it is the hydraulic flashboard blowout preventer of double disc; When hydraulic flashboard blowout preventer equips the flashboard assembly of more than three groups and three groups, it is the hydraulic flashboard blowout preventer of many flashboards.Port connection is tightly connected the hydraulic oil pipeline of hydraulic system, when hydraulic control system hydraulic oil enters the cylinder barrel closedown chamber, left and right controlling flashboard assembly, promote piston-advance and drive left and right flashboard assembly to move respectively to well head center along the side through hole of housing, realize closing Oil/gas Well, when hydraulic oil enters cylinder barrel unlatching chamber, left and right, promote piston retreat and drive left and right flashboard assembly to leaving the motion of well head center position, open Oil/gas Well, flashboard assembly switch is controlled by the reversal valve of the hydraulic control unit of hydraulic system.The hydraulic flashboard blowout preventer of full seal structure, by closing or open blind rams assembly, thus realizes totally-enclosed well head or opens well head; The hydraulic flashboard blowout preventer of half seal structure, by closing or open half envelope flashboard assembly, thus realizes the annular space closed between tubing string and sleeve pipe or the annular space opened between tubing string and sleeve pipe; Full envelope and the hydraulic flashboard blowout preventer partly sealing the structure combined, by closing or open blind rams assembly, thus realize totally-enclosed well head or open well head, again by closing or open half envelope flashboard assembly, thus realize the annular space closed between tubing string and sleeve pipe or the annular space opened between tubing string and sleeve pipe.At present, half envelope flashboard assembly of the hydraulic flashboard blowout preventer of oil well is single size flashboard assembly, a kind of half envelope flashboard assembly of size can only seal the tubing string of corresponding size, and oil well tubing string used is all combined string mostly, therefore the flashboard assembly being equipped with different size is needed, thus satisfy the demand by changing flashboard assembly, so not only increase workload when operating, and there is potential safety hazard; Or, its hydraulic flashboard blowout preventer equipment many groups half envelope flashboard assembly, respectively group half envelope flashboard assembly specification is different for they, thus adapt to the change of the external diameter specification of tubing string, and the hydraulic flashboard blowout preventer structure of this many flashboards repeats, volume greatly, highly high, Heavy Weight, cost are high, complicated operation.So existing hydraulic flashboard blowout preventer can not meet the requirement needed for well workover.

Summary of the invention

The object of the invention is: the hydraulic flashboard blowout preventer that a kind of reducing seals is provided, the flashboard assembly of its equipment reducing, the half envelope flashboard assembly equipped that the flashboard assembly of its reducing overcomes existing hydraulic flashboard blowout preventer is single size flashboard, the flashboard assembly of size can only seal a defect for the tubing string of corresponding size, and the flashboard assembly of its a set of reducing can close the tubing string of different specification size; Thus the hydraulic flashboard blowout preventer of its reducing sealing can close the tubing string of different specification size by the flashboard total performance of one group reducing, realize reducing sealing, and structure is simple, easy for installation; Drastically increase the labor productivity of workman, stop to produce new potential safety hazard.

The object of the present invention is achieved like this: the hydraulic flashboard blowout preventer of reducing sealing is the well controlled blowout-proof device that oilfield downhole operation uses, a kind of because taking precautions against gas blowout accident and designing, can the device of timely safe closing well after well kick occurs, when underground work, blowout prevention can be realized well; It adopts hydraulic-driven, belongs to hydraulic flashboard blowout preventer.When lower oil tube, Oil/gas Well generation overflow or blowout or other spy oestrus condition time, the hydraulic flashboard blowout preventer of reducing sealing can realize closed Oil/gas Well well.The hydraulic flashboard blowout preventer of reducing sealing comprises housing, hydraulic cylinder, the flashboard assembly of reducing, side door, side door bolt, port connection, and the hydraulic flashboard blowout preventer of reducing sealing also comprises sealing mechanism, the hydraulic flashboard blowout preventer of reducing sealing is bilateral symmetry, and namely its left side structure is identical with the specification framework of right side structure and symmetrical, housing comprises body and flange arrangement, body is rectangular structure, the center of body is the main through hole of hollow circular configuration, flange arrangement comprises neck flange and flange, housing there are two flange arrangements, two flange arrangements lay respectively at the both sides of body, the intermediate throughholes of two flange arrangement interlinks with main through hole respectively, the center line of flange arrangement and the center line of main through hole are on the same line, housing has two side through hole, side through hole communicates with main through hole respectively, its side through hole combines the structure of formation a pair side through hole in pairs, a same side through hole to side through hole is positioned at main through hole side, another side through hole is positioned at main through hole opposite side, the center line of two side through hole on the same line and with the vertical and intersectant centerline of main through hole, hydraulic cylinder comprises cylinder barrel and cylinder cap, piston and piston rod, screw mandrel, cylinder barrel bolt and sealing device, piston rod is fixedly connected on the side of piston, the outer end of piston rod is pin thread structure, its top is plane, be referred to as to push up plane, the central axis of top plane and piston, the two sides be connected with top plane are plane and side plane, its two side plane respectively with top plane orthogonal, and be parallel to each other, the vertical distance that its two side plane arrives the center line of piston is respectively equal, between side plane with piston rod main body, fluted structure is connected, groove structure open at both ends, its groove structure comprises groove bottom and groove side, its groove bottom is parallel with side plane, its two grooves side is parallel to each other, and it is vertical with groove bottom, the top plane parallel of groove side and piston rod, piston rod there is the blind hole of connection wire rod, the blind hole of connection wire rod and the central through hole of piston interlink, the blind hole of connection wire rod and the central through hole of piston and piston rod, the center line of piston on the same line, internal thread is had in the central through hole of piston and the blind hole of connection wire rod that links together, screw mandrel comprises body and step, body is circular pin, the step of the outwardly annular of intermediate peripheral wall of body, its step separates leading portion and back segment screw mandrel body, the external diameter of leading portion is less than the external diameter of back segment, the leading portion of body there is male thread.Complement one another between the side through hole of hydraulic cylinder, side door and housing, the quantity correspondence of the side through hole of hydraulic cylinder, side door and housing is identical, hydraulic cylinder and being connected between side door and housing.Hydraulic cylinder and syndeton between side door and housing, namely piston rod packs in the hole in the middle of side door, piston is inserted in cylinder barrel, internal thread in the central through hole of the male thread on the leading portion of the body of screw mandrel and piston and the blind hole of the connection wire rod of piston rod that links together screws and is connected, cylinder cap sealing shroud connects the back segment of the body of screw mandrel, the sealing device of hydraulic cylinder comprises sealing between the back segment of the body of cylinder cap and screw mandrel and the sealing between cylinder cap and cylinder barrel and the sealing between side door and cylinder barrel, sealing between piston rod and side door, sealing between piston rod and side door is divided into two parts, a part is sealed well pressure, a part is the oil pressure that sealing hydraulic control produces, twice sealing mechanism is between this two department, for making the sealing at this place very reliable, there is the sealing ring of multiplet, and the auxiliary seal of middle O-ring seals, side door itself is connected with housing by side door bolt, side door is positioned at outside the side through hole of housing, side door is covered on side through hole, and cylinder cap and cylinder barrel are fixed together by cylinder barrel bolt and side door, and the sealing between side door and cylinder barrel adopts y-shaped ring to realize two way seal.The sealing mechanism of hydraulic flashboard blowout preventer of reducing sealing comprises the sealing of sealing between side door and housing and oil circuit.The respective independently oil circuit hole of this distribution in vivo two of housing, there are a collar extension and two oil circuit apertures in its oil circuit hole independently, collar extension is positioned on this outside, two oil circuit apertures lay respectively at the outside of same two side through hole to side through hole of housing, the oil circuit aperture in the oil circuit hole of the body of housing and the corresponding connection of oil circuit ostium of side door, the collar extension in the oil circuit hole of the body of its housing is fixedly connected with port connection; There are two oil circuit apertures in the outside of side through hole, and its two oil circuits aperture belongs to two oil circuit holes respectively, and its two oil circuit holes are respectively the oil circuit hole of control piston advance and the oil circuit hole of control piston retrogressing; Have an oil circuit hole in cylinder cap body, cylinder cap body is pierced in all side of being connected corresponding to cylinder barrel inside cylinder cap, its oil circuit hole, and passes from the centre inside cylinder cap; Cylinder barrel has an oil circuit hole, the oil circuit aperture, all sides in cylinder cap oil circuit hole connects with an oil circuit orifice sealing in the oil circuit hole of cylinder barrel, the oil circuit aperture of the centre of the inner side in the oil circuit hole of cylinder cap is led in cylinder barrel, the oil circuit hole of two break-through side doors is had in its side door, the oil circuit hole advanced with another oil circuit aperture in the oil circuit hole of cylinder barrel and the control piston of housing respectively in the two oil circuit apertures in an oil circuit hole of side door seals and interlinks, and the oil circuit hole that another oil circuit hole of side door and the control piston of housing retreat seals and interlinks and lead in cylinder barrel; Each parts are successively installed connection according to program respectively and are completed, and have rubber seal rings for seal to connect, form the oil circuit of independent completion sealing between its oil circuit aperture mutually directly connected.The sealing of oil circuit comprises the sealing of the oil circuit hole collar extension of sealing between the oil circuit aperture that mutually directly connects and port connection and housing.The flashboard assembly of reducing belongs to the one of half envelope flashboard assembly, and the flashboard assembly of reducing comprises gate panel body and seal; Seal comprises top glue core, anterior reducing glue core, and top glue core also claims top sealing, and anterior reducing glue core also claims front reducing to seal; The gate panel body of the flashboard assembly of reducing matches with top glue core, anterior reducing glue core, and the gate panel body of the flashboard assembly of its reducing is referred to as variable bore ram body; Anterior reducing glue core is made up of agent structure and external ear, its agent structure is the structure of semi-toroidal shape, left and right two head part of its agent structure protrude the external ear forming symmetrical bulk shape not laterally, thus, the head of its agent structure and external ear are interconnected to form the head of anterior reducing glue core, and anterior reducing glue core has two heads; Anterior reducing glue core comprises reducing colloid, ironware, parallels, motion bar, connecting rod; Reducing colloid is the carrier of ironware, parallels, motion bar, connecting rod, and ironware, parallels, motion bar, connecting rod are incorporated among reducing colloid respectively.Anterior reducing glue core comprises multiple ironware, four parallels, two motion bars and two connecting rods; Anterior reducing glue core is by the disposable sulfuration and become an entirety in mould of multiple ironware, four parallels, two motion bars and two connecting rods and rubber.Ironware is the structure of special-shaped cam, ironware is made up of two special-shaped cams and connector, the end of ironware is special-shaped cam, special-shaped cam comprises head, middle part and afterbody, special-shaped cam is the structure of narrow " V " shape leaf lobe shape of head, special-shaped cam has lateral surface and medial surface, and lateral surface and the medial surface of special-shaped cam are parallel to each other, the outer wall of the head of special-shaped cam is arc-shaped surface, the outer wall of the head of its special-shaped cam is respectively with the lateral surface of special-shaped cam with medial surface is crossing connects, there are two wall planes be connected that intersect vertically with lateral surface and medial surface respectively at the middle part of special-shaped cam, two wall plane apportion both sides, two wall planes are crossing with the two ends of the outer wall of head respectively to be connected, in two wall planes, the short wall plane of its length is referred to as shortwall plane, the wall plane that its length is long is referred to as longwell plane, the afterbody of special-shaped cam is convex-concave curved configuration, the afterbody of special-shaped cam comprises the outside wall surface of " s " shape, the outside wall surface of arc curve and tail wall plane, the outside wall surface of " s " shape, the outside wall surface of arc curve and tail wall plane are respectively with the lateral surface of special-shaped cam with medial surface is crossing is connected, one end of the outside wall surface of " s " shape connects longwell plane, the other end of the outside wall surface of " s " shape connects tail wall plane, one end of the outside wall surface of arc connects shortwall plane, the other end of the outside wall surface of arc connects tail wall plane, like this, tail wall interplanar is in the outside wall surface of " s " shape, between the outside wall surface of arc, and respectively with the outside wall surface of " s " shape, the outside wall surface of arc curve intersects and connects, the inner side being positioned at the affiliated plane of longwell plane of the outside wall surface of " s " shape, the protrusion of the outside wall surface of arc curve and be positioned at the outside of the affiliated plane of shortwall plane, like this, the interior angle of the affiliated plane of tail wall plane and the affiliated Plane intersects of shortwall plane is obtuse angle, and the interior angle of the affiliated plane of tail wall plane and the affiliated Plane intersects of longwell plane is acute angle, connector is flat bar structure, and connector has two lateral surfaces and two arc surfaces, and two lateral surfaces of connector are parallel to each other, and lateral surface is between two arc surfaces, and arc surface is crossing with two lateral surfaces respectively to be connected, connector two connects special-shaped cam respectively, the medial surface of special-shaped cam intersects vertically with connector and is connected, the center line of its connector is parallel and vertical with medial surface with the lateral surface of special-shaped cam with two lateral surfaces of connector respectively, and two special-shaped cams be positioned at respectively symmetrically connector two outside, an arc surface of connector and the head of special-shaped cam are in the same side, and another arc surface of connector and the afterbody of special-shaped cam are in the same side.Anterior reducing glue core has multiple ironware, multiple ironware is incorporated among reducing colloid respectively, multiple ironware is spaced, evenly forward, ordered arrangement, the center line of the connector of its each ironware is parallel to each other and respectively on same circular arc, spacing distance between the center line of the connector of each ironware is identical, the lateral surface being positioned at the special-shaped cam of the same side of its each ironware at grade, the medial surface being positioned at the special-shaped cam of the same side of each ironware at grade, thus multiple ironware forms the assembly of the frame construction of semi-ring form, assembly belongs to a part for anterior reducing glue core agent structure, two special-shaped cams of same ironware lay respectively at the skin of the both sides of anterior reducing glue core agent structure.It is inner that its ironware is longitudinally erected in reducing colloid, the head of the special-shaped cam of ironware is positioned at inner side, the afterbody of the special-shaped cam of ironware is positioned at outside, the head of ironware does not point to the arc core line of the circular arc at the center line place of the connector of each ironware, its arc core line refer to the circular arc at the center line place of the connector through its each ironware arc core and respectively with the center line of the centerline parallel of the connector of each ironware, ironware is tiltedly to its arc core line, and the head of the special-shaped cam of ironware refers to the side of arc core line partially; Interval between the head of the special-shaped cam of its multiple ironware is identical, and equally, the interval between the afterbody of the special-shaped cam of its multiple ironware is identical.Parallels is rectangle structure, and there is through hole the centre of parallels, and its through hole has two relative inwall side planes be parallel to each other and two relative arc inner wall faces, and relative with two the respectively inwall side plane be parallel to each other in arc inner wall face is crossing to be connected; Motion bar is columniform bar, and it comprises mobile jib and bar head, and bar head has two, mobile jib two ends are connecting-rod cap respectively, mobile jib and bar head are respectively cylindrical shape, and the diameter of mobile jib is greater than the diameter of bar head, and the center line of mobile jib and bar head and motion bar on the same line.Connecting rod is interconnected to constitute by main body bar and major part, main body bar is cylindrical shape, there is through hole the outer end of the main body bar of its connecting rod, its through hole has two relative inwall side planes be parallel to each other and two relative arc inner wall faces, and relative with two the respectively inwall side plane be parallel to each other in arc inner wall face is crossing to be connected; Major part there are a medial plane and breach, its medial plane is parallel with the inwall side plane of the through hole of main body bar, its breach is the opening of the shape of arc side face, and the arc core line of the arc side face of its breach is parallel with medial plane, its arc core line and main body bar central axis.The glue plane that the head of anterior reducing glue core has two to be parallel to each other, wherein, a glue plane is front glue plane before head, another glue plane back side after head is rear glue plane, the front glue plane of two heads of anterior reducing glue core at grade, its place plane is vertical with the longitudinally middle tangent plane of anterior reducing glue core, and the rear glue plane of two heads of anterior reducing glue core at grade.Its motion bar is longitudinally erected in the inside of the head of anterior reducing glue core, and be erected in the outside of assembly, the center line of the center line of motion bar and the connector of ironware is parallel to each other, the bar head of motion bar one end puts in the through hole of a parallels, the bar head of the motion bar other end puts in the through hole of another parallels, be connected between its motion bar and parallels, the center line of motion bar is vertical with the lateral surface of two parallels respectively, motion bar and connecting rod are interconnected, connecting rod links the mobile jib of motion bar by the breach on its major part, make the center line of main body bar and the central axis of motion bar of connecting rod, and the center line of the main body bar of connecting rod divides the vertical distance of the lateral surface being clipped to two parallels equal, the outer end of the main body bar of connecting rod stretches out reducing colloid backward, namely the rear glue plane of the head of anterior reducing glue core is stretched out, thus, its motion bar and two parallels be directly connected with its motion bar, connecting rod forms a grip assembly, one head of its anterior reducing glue core comprises a grip assembly, and another head of its anterior reducing glue core comprises another set of assembly, it is positioned at the lateral surface of two parallels of the same side of anterior reducing glue core at grade, the center line of the main body bar of two connecting rod is parallel to each other, and the center line of the main body bar of two connecting rods divides the vertical distance of the longitudinally middle tangent plane being clipped to anterior reducing glue core equal.The agent structure of anterior reducing glue core comprises the outer ring of arc and semicircular inner ring, glue plane after connection two is intersected in outer ring, inner ring intersects the front glue plane of connection two, the arc core line of the arc core line of outer ring and the arc core line of inner ring and assembly is same straight line, and its arc core line is in plane belonging to the longitudinally middle tangent plane of anterior reducing glue core; Its inner ring is sandwiched between the affiliated plane of the medial surface of two special-shaped cams of same ironware, and in the middle of inner ring is longitudinal, the longitudinally middle tangent plane of tangent plane and anterior reducing glue core is same plane.The inner ring of the agent structure of anterior reducing glue core adopts the structure of semicircular inwall side face or adopts semicircular inwall side face inwardly to give prominence to the structure of the semi-ring body of each special-shaped cam of assembly.Two heads of anterior reducing glue core, one for there being the head of two interfaces, one for there being the head of two guide grooves, at the head having two interfaces of anterior reducing glue core, two special-shaped cams of the ironware of one end of its assembly stretch out corresponding front glue plane respectively, the part at middle part that the part of stretching out front glue plane of its special-shaped cam is the whole of a part for the head of its special-shaped cam or the head of the head of special-shaped cam and the part at middle part or special-shaped cam and is inconjunction with, the part of stretching out front glue plane of its special-shaped cam is referred to as stretched head, stretched head is two, and the interface of the head of its anterior reducing glue core is in front glue plane, at the head having two guide grooves of anterior reducing glue core, two special-shaped cams of the ironware of the other end of its assembly stretch out its front glue plane corresponding respectively, the part of stretching out front glue plane of its special-shaped cam is the part of the afterbody of its special-shaped cam or the afterbody of special-shaped cam and the part at middle part, two special-shaped cams of the ironware of this end of its assembly respectively and produce the breach of two dihedrals between inner ring and front glue plane, its breach is guide groove, the part of stretching out front glue plane of the special-shaped cam of this end of its assembly is referred to as to stretch out tail, and stretching out tail is two, when the inner ring of the agent structure of anterior reducing glue core adopts the structure of semicircular inwall side face, each special-shaped cam of the inside outstanding assembly of its inner ring, when the inner ring of the agent structure of anterior reducing glue core adopts semicircular inwall side face inwardly to give prominence to the structure of the semi-ring body of each special-shaped cam of assembly, its semi-ring body inwardly gives prominence to each special-shaped cam of assembly, its semi-ring body is sandwiched between the affiliated plane of the medial surface of two special-shaped cams of same ironware, in the middle of semi-ring body is longitudinal, the longitudinally middle tangent plane of tangent plane and anterior reducing glue core is same plane, a part for the head of two special-shaped cams of each ironware of assembly or the head of the head of two special-shaped cams and the part at middle part or two special-shaped cams whole and the part at middle part that is inconjunction with thereof are respectively to the interior inwall side face tiltedly stretching out inner ring.Parallels protrudes the agent structure of anterior reducing glue core, be positioned at the outside of the affiliated plane of the lateral surface of special-shaped cam, interlaced between the special-shaped cam of parallels and the ironware in the head of anterior reducing glue core, partially overlap, its parallels is positioned at the skin of the head of anterior reducing glue core, and connect the head of the agent structure of anterior reducing glue core, parallels belongs to a part for external ear; Variable bore ram body complements one another with seal and is connected.Variable bore ram body there is hatch frame, hatch frame is positioned at the front portion of variable bore ram body, hatch frame and anterior reducing glue core adapt to, match, hatch frame comprises two opening sheets, the anteriomedial of opening sheet has the opening of arc, its opening both sides are respectively forward plane, two forward plane is crossing with the inner circumferential wall of the opening of the arc of the anteriomedial of opening sheet respectively to be connected, two forward plane at grade, the arc core line of the inner circumferential wall of opening and the middle tangent plane of variable bore ram body are at grade, forward plane is mutually vertical with the middle tangent plane of variable bore ram body, opening sheet has middle inner face and two side inner faces, two side inner faces lay respectively at the both sides of middle inner face, two side inner faces at grade, middle inner face is parallel with side inner face, middle inner face is mutually vertical with the arc core line of the inner circumferential wall of opening, middle inner face protrudes from side inner face, thus connected by side between its middle inner face and side inner face, its side is vertical with side inner face with middle inner face to be respectively connected, two opening sheets are respectively top opening sheet and bottom opening sheet, the middle inner face of top opening sheet is relative with the middle inner face of bottom opening sheet and be parallel to each other, the side inner face of top opening sheet is relative with the side inner face of bottom opening sheet and be parallel to each other, and the arc core line of the inner circumferential wall of the opening of two opening sheets on the same line, the inner circumferential wall of arc is had to connect between the middle inner face of two opening sheets, the inner circumferential wall of its arc is referred to as center peripheral wall surfaces, the arc core line of the arc core line of its center peripheral wall surfaces and the inner circumferential wall of opening on the same line, the diameter of its center peripheral wall surfaces is greater than the diameter of the inner circumferential wall of opening, center peripheral wall surfaces is crossing with the middle inner face of two opening sheets respectively to be connected, there is inner plane the both sides of center peripheral wall surfaces respectively, two inner planes at grade, inner plane is parallel with forward plane, inner plane is crossing with center peripheral wall surfaces to be connected, be connected by interior lead angle between inner plane with side inner face, arc seal groove is arranged at the top of variable bore ram body, arc seal groove comprises intermediate seal groove and side seal groove, two side seal grooves lay respectively at the both sides of intermediate seal groove, intermediate seal groove is connected with both sides sealing groove respectively, the degree of depth of intermediate seal groove is less than the degree of depth of side seal groove, the groove bottom of intermediate seal groove is parallel with the groove bottom of side seal groove, the groove bottom of intermediate seal groove is parallel with middle inner face, the groove bottom of side seal groove intersects vertically with inner plane and is connected, the vertical distance of the side inner face that the vertical distance of the groove bottom of the side seal groove side inner face of opening sheet is on earth the less than top opening sheet side inner face of opening sheet on earth, make the groove bottom of side seal groove, a breach is formed between the side inner face of inner plane and top opening sheet, inner plane has the blind hole connecting anterior reducing glue core, its blind hole center line is vertical with inner plane, the groove bottom of side seal groove has the blind hole connecting top glue core, and its blind hole center line is vertical with the groove bottom of side seal groove, and two blind holes intersections communicate, the bottom opening sheet of variable bore ram body there are centering guiding oblique angle and centering gathering sill, bottom opening sheet has the water jacket connecting centering guiding oblique angle, centering guiding oblique angle is fixedly connected on water jacket, and the fixed connection structure of centering guiding oblique angle and water jacket adopts welded construction or adopts headless screw syndeton, when adopting headless screw syndeton, its bottom opening sheet there are two through holes, the center line of its through hole is vertical with the middle inner face on bottom opening sheet, two through hole communicates with water jacket respectively, its through hole is female thread structure, there are two internal thread holes matching corresponding with the through hole of two on bottom opening sheet at oblique angle to centering guiding, is fastenedly connected bottom opening sheet and centering guiding oblique angle respectively by headless screw, and centering guiding oblique angle is fixedly connected on water jacket.Like this, anterior reducing glue core cooperatively interacts with variable bore ram body and is connected, its anterior reducing glue core pressure is sandwiched between the top opening sheet of the hatch frame of variable bore ram body and bottom opening sheet, and the main body bar that the connecting rod of reducing colloid is stretched out in the outer end of the main body bar of the connecting rod of anterior reducing glue core namely injects in the blind hole of connection anterior reducing glue core of variable bore ram body completely; Top glue core pressure is embedding to be sandwiched in the arc seal groove at the top of variable bore ram body, and the connecting rod stretching out the top colloid of top glue core of its top glue core injects in the blind hole of connection top glue core of variable bore ram body completely; The connecting rod of its top glue core is cooperatively interacted with the connecting rod of anterior reducing glue core be connected, namely the connecting rod of its top glue core injects in the through hole of the outer end of the main body bar of the connecting rod of anterior reducing glue core.Like this, its top glue core and anterior reducing glue core are attached on variable bore ram body respectively, and Jiao Xin two, top cooperatively interacts with two heads of anterior reducing glue core respectively and links together, and forms confined space, thus, form the flashboard assembly of reducing.The diameter of the inner circumferential wall of the arc of the opening sheet of variable bore ram body is greater than the semicircular inwall side face diameter of the inner ring of anterior reducing glue core or is greater than the diameter of semi-ring body of anterior reducing glue core.Variable bore ram body there is box structure, box structure is positioned at the back part of variable bore ram body, box structure matches with the pin thread structure of the outer end of piston rod, it is convex straight trough, it is made up of inside groove and water jacket, namely there is convex straight trough in the outside of variable bore ram body, horizontal break-through pedestal, its groove bottom is plane, convex straight trough comprises inside groove and water jacket, the width of its inside groove is greater than the width of water jacket, vertical distance between two groove sides of water jacket is identical with the vertical distance between two groove bottom of two groove structures at the top of the pin thread structure of the outer end of piston rod, the width of the groove structure groove bottom of the pin thread structure of the outer end of its piston rod is identical with the width of the groove side of the water jacket of the box structure of variable bore ram body, the pin thread structure top plane of the outer end of piston rod is identical to the degree of depth of the inside groove of the vertical distance of groove side adjacent with top plane of groove structure and the box structure of variable bore ram body, vertical distance between two side planes of the pin thread structure of the outer end of piston rod is equal with the vertical distance between two groove sides of the inside groove of the convex straight trough of the box structure of variable bore ram body, the flashboard assembly of reducing has two, and the flashboard assembly of two reducings complements one another into the flashboard assembly of a set of reducing, and like this, its corresponding top glue core has two, and two top glue cores complement one another into a set of top glue core, its corresponding anterior reducing glue core also has two, and two anterior reducing glue cores complement one another into a set of anterior reducing glue core, and in its a set of anterior reducing glue core, two anterior reducing glue cored structures are identical, variable bore ram body also has two, two a set of variable bore ram bodies of the supporting one-tenth of variable bore ram body, when the flashboard assembly of two reducings docks mutually, the flashboard assembly of two reducings of the flashboard assembly of a set of reducing complements each other to form a unified overall structure, namely in two variable bore ram bodies of a set of variable bore ram body, centering guiding oblique angle on two variable bore ram bodies and centering gathering sill cooperatively interact, its centering guiding oblique angle is made to inject mutually corresponding centering gathering sill, in two anterior reducing glue cores of a set of anterior reducing glue core, having the head of two interfaces and having the head of two guide grooves to cooperatively interact to dock respectively on two anterior reducing glue cores, its stretched head respectively on two anterior reducing glue cores and guide groove, stretch out tail and interface cooperatively interacts, stretched head is made to inject mutually corresponding guide groove, stretch out tail and inject mutually corresponding interface, and in its a set of anterior reducing glue core, the lateral surface being positioned at the special-shaped cam of the same side of each ironware of two anterior reducing glue cores at grade.The hydraulic flashboard blowout preventer of reducing sealing is bilateral symmetry, housing is a pair side through hole structure, one is to the flashboard assembly installing reducing in two of side through hole side through hole respectively, the flashboard assembly of the reducing in same a pair left and right side through hole of housing complements one another, relative between two, and in the through hole of the same side, the pin thread structure of the piston rod of its correspondence to inject in the box structure on the variable bore ram body of the flashboard assembly of reducing and mutually coincide, and the flashboard assembly of two reducing complemented one another is the flashboard assembly of a set of reducing; Port connection is tightly connected the hydraulic oil pipeline of hydraulic system, when the left and right cylinder barrel that hydraulic control system hydraulic oil enters the flashboard assembly controlling reducing closes chamber, promote piston-advance and drive the flashboard assembly of left and right reducing to move respectively to well head center along the side through hole of housing, the flashboard assembly of two reducings docks mutually, when tubing diameter is greater than the format diameter of anterior reducing glue core in its natural state, its multiple ironware ends contact, to the surface of oil pipe, creates mutual thrust (along oil pipe radial direction) simultaneously.The stressed extruding of ironware is outwards moved, simultaneously the connector of special-shaped cam structure produce rotary motion, inner ring contacts with the appearance of oil pipe and is extruded, when the active force (along oil pipe radial direction) extruded increases to the specification form that can change anterior reducing glue core, anterior reducing glue core is made to produce distortion, realize anterior reducing glue core reducing, thus the annular space closed between oil pipe and sleeve pipe, realize closing Oil/gas Well; When tubing diameter is less than anterior reducing glue core format diameter in its natural state, ironware and rubber are subject to the effect of variable bore ram body simultaneously, extruding is internally moved, oil pipe surface is formed and surrounds extruding, when the active force (along oil pipe radial direction) extruded can change the specification form of anterior reducing glue core, make anterior reducing glue core produce distortion, realize anterior reducing glue core reducing, thus the annular space closed between oil pipe and sleeve pipe, realize closing Oil/gas Well.When hydraulic oil enters cylinder barrel unlatching chamber, left and right, promote piston and retreat and drive the flashboard assembly of reducing to leaving the motion of well head center position, open Oil/gas Well, anterior reducing glue core returns to nature again.The flashboard assembly switch of reducing is controlled by the reversal valve of the hydraulic control unit of hydraulic system.Like this, the hydraulic flashboard blowout preventer of its reducing sealing can close the tubing string of different specification size by the flashboard total performance of one group reducing, realize reducing sealing, thus reach object of the present invention.

Owing to adopting technique scheme, the hydraulic flashboard blowout preventer of its reducing sealing can close the tubing string of different specification size by the flashboard total performance of one group reducing, realize reducing sealing, and structure is simple, easy for installation; Drastically increase the labor productivity of workman, stop to produce new potential safety hazard.

Accompanying drawing explanation

Below in conjunction with embodiment, the hydraulic flashboard blowout preventer that reducing of the present invention seals is further described.

The structural representation of the hydraulic flashboard blowout preventer of the reducing sealing of the embodiment of the hydraulic flashboard blowout preventer that accompanying drawing 1 seals for reducing of the present invention.

The structural representation of the anterior reducing glue core of the hydraulic flashboard blowout preventer of the reducing sealing of the embodiment of the hydraulic flashboard blowout preventer that accompanying drawing 2 seals for reducing of the present invention.

The structure dissection figure of the anterior reducing glue core of the hydraulic flashboard blowout preventer of the reducing sealing of the embodiment of the hydraulic flashboard blowout preventer that accompanying drawing 3 seals for reducing of the present invention.

The special-shaped cam structure schematic diagram of the ironware of the anterior reducing glue core of the hydraulic flashboard blowout preventer of the reducing sealing of the embodiment of the hydraulic flashboard blowout preventer that accompanying drawing 4 seals for reducing of the present invention.

The perspective view of the anterior reducing glue core of the hydraulic flashboard blowout preventer of the reducing sealing of the embodiment of the hydraulic flashboard blowout preventer that accompanying drawing 5 seals for reducing of the present invention.

The structural representation of the variable bore ram body of the hydraulic flashboard blowout preventer of the reducing sealing of the embodiment of the hydraulic flashboard blowout preventer that accompanying drawing 6 seals for reducing of the present invention.

In figure: 1, hydraulic cylinder 2, cylinder barrel bolt 3, cylinder cap 4, side door bolt 5, side door 6, housing 7, anterior reducing glue core 8, the flashboard assembly 9 of reducing, piston rod 10, cylinder barrel 11, piston 12, screw mandrel 13, port connection 14, flange 15, top glue core 16, reducing colloid 17, front glue plane 18, interface 19, ironware 20, the structure 21 of semi-ring body, semicircular inwall side face 22, parallels 23, motion bar 24, connecting rod 25, rear glue plane 26, the outer end 27 of the main body bar of connecting rod, stretch out tail 28, stretched head 29, guide groove 30, variable bore ram body 31, box structure 32, the blind hole 33 of the connection top glue core in the groove bottom of side seal groove, arc seal groove 34, middle inner face 35 on bottom opening sheet, side inner face 36 on bottom opening sheet, top opening sheet 37, centering gathering sill 38, inner plane 39, the blind hole 40 of the anterior reducing glue of the connection on inner plane core, the opening 41 of the arc of the anteriomedial of opening sheet, center peripheral wall surfaces 42, water jacket 43, forward plane 44, hatch frame 45, centering guiding oblique angle 46, outer ring 47, side inner face 48 on top opening sheet, the outer wall 49 of the head of special-shaped cam, the lateral surface 50 of special-shaped cam, the shortwall plane 51 of special-shaped cam, the outside wall surface 52 of the arc curve of special-shaped cam, the tail wall plane 53 of special-shaped cam, the longwell plane 54 of special-shaped cam, the medial surface 55 of special-shaped cam, the outside wall surface of " s " shape of the afterbody of special-shaped cam

Detailed description of the invention

In figure: the hydraulic flashboard blowout preventer of reducing sealing adopts hydraulic-driven, belongs to hydraulic flashboard blowout preventer.The hydraulic flashboard blowout preventer of reducing sealing comprises housing (6), hydraulic cylinder (1), the flashboard assembly (8) of reducing, side door (5), side door bolt (4), port connection (13), and the hydraulic flashboard blowout preventer of reducing sealing also comprises sealing mechanism, the hydraulic flashboard blowout preventer of reducing sealing is bilateral symmetry, and namely its left side structure is identical with the specification framework of right side structure and symmetrical, housing comprises body and flange arrangement, body is rectangular structure, the center of body is the main through hole of hollow circular configuration, flange arrangement comprises neck flange and flange (14), housing there are two flange arrangements, two flange arrangements lay respectively at the both sides of body, the intermediate throughholes of two flange arrangement interlinks with main through hole respectively, the center line of flange arrangement and the center line of main through hole are on the same line, housing has two side through hole, side through hole communicates with main through hole respectively, its side through hole combines the structure of formation a pair side through hole in pairs, a same side through hole to side through hole is positioned at main through hole side, another side through hole is positioned at main through hole opposite side, the center line of two side through hole on the same line and with the vertical and intersectant centerline of main through hole, hydraulic cylinder comprises cylinder barrel (10) and cylinder cap (3), piston (11) and piston rod (9), screw mandrel (12), cylinder barrel bolt (2) and sealing device, piston rod is fixedly connected on the side of piston, the outer end of piston rod is pin thread structure, its top is plane, be referred to as to push up plane, the central axis of top plane and piston, the two sides be connected with top plane are plane and side plane, its two side plane respectively with top plane orthogonal, and be parallel to each other, the vertical distance that its two side plane arrives the center line of piston is respectively equal, between side plane with piston rod main body, fluted structure is connected, groove structure open at both ends, its groove structure comprises groove bottom and groove side, its groove bottom is parallel with side plane, its two grooves side is parallel to each other, and it is vertical with groove bottom, the top plane parallel of groove side and piston rod, piston rod there is the blind hole of connection wire rod, the blind hole of connection wire rod and the central through hole of piston interlink, the blind hole of connection wire rod and the central through hole of piston and piston rod, the center line of piston on the same line, internal thread is had in the central through hole of piston and the blind hole of connection wire rod that links together, screw mandrel comprises body and step, body is circular pin, the step of the outwardly annular of intermediate peripheral wall of body, its step separates leading portion and back segment screw mandrel body, the external diameter of leading portion is less than the external diameter of back segment, the leading portion of body there is male thread.Complement one another between the side through hole of hydraulic cylinder, side door and housing, the quantity correspondence of the side through hole of hydraulic cylinder, side door and housing is identical, hydraulic cylinder and being connected between side door and housing.Hydraulic cylinder and syndeton between side door and housing, namely piston rod packs in the hole in the middle of side door, piston is inserted in cylinder barrel, internal thread in the central through hole of the male thread on the leading portion of the body of screw mandrel and piston and the blind hole of the connection wire rod of piston rod that links together screws and is connected, cylinder cap sealing shroud connects the back segment of the body of screw mandrel, the sealing device of hydraulic cylinder comprises sealing between the back segment of the body of cylinder cap and screw mandrel and the sealing between cylinder cap and cylinder barrel and the sealing between side door and cylinder barrel, sealing between piston rod and side door, sealing between piston rod and side door is divided into two parts, a part is sealed well pressure, a part is the oil pressure that sealing hydraulic control produces, twice sealing mechanism is between this two department, for making the sealing at this place very reliable, there is the sealing ring of multiplet, and the auxiliary seal of middle O-ring seals, side door itself is connected with housing by side door bolt, side door is positioned at outside the side through hole of housing, side door is covered on side through hole, and cylinder cap and cylinder barrel are fixed together by cylinder barrel bolt and side door, and the sealing between side door and cylinder barrel adopts y-shaped ring to realize two way seal.The sealing mechanism of hydraulic flashboard blowout preventer of reducing sealing comprises the sealing of sealing between side door and housing and oil circuit.The respective independently oil circuit hole of this distribution in vivo two of housing, there are a collar extension and two oil circuit apertures in its oil circuit hole independently, collar extension is positioned on this outside, two oil circuit apertures lay respectively at the outside of same two side through hole to side through hole of housing, the oil circuit aperture in the oil circuit hole of the body of housing and the corresponding connection of oil circuit ostium of side door, the collar extension in the oil circuit hole of the body of its housing is fixedly connected with port connection; There are two oil circuit apertures in the outside of side through hole, and its two oil circuits aperture belongs to two oil circuit holes respectively, and its two oil circuit holes are respectively the oil circuit hole of control piston advance and the oil circuit hole of control piston retrogressing; Have an oil circuit hole in cylinder cap body, cylinder cap body is pierced in all side of being connected corresponding to cylinder barrel inside cylinder cap, its oil circuit hole, and passes from the centre inside cylinder cap; Cylinder barrel has an oil circuit hole, the oil circuit aperture, all sides in cylinder cap oil circuit hole connects with an oil circuit orifice sealing in the oil circuit hole of cylinder barrel, the oil circuit aperture of the centre of the inner side in the oil circuit hole of cylinder cap is led in cylinder barrel, the oil circuit hole of two break-through side doors is had in its side door, the oil circuit hole advanced with another oil circuit aperture in the oil circuit hole of cylinder barrel and the control piston of housing respectively in the two oil circuit apertures in an oil circuit hole of side door seals and interlinks, and the oil circuit hole that another oil circuit hole of side door and the control piston of housing retreat seals and interlinks and lead in cylinder barrel; Each parts are successively installed connection according to program respectively and are completed, and have rubber seal rings for seal to connect, form the oil circuit of independent completion sealing between its oil circuit aperture mutually directly connected.The sealing of oil circuit comprises the sealing of the oil circuit hole collar extension of sealing between the oil circuit aperture that mutually directly connects and port connection and housing.The flashboard assembly of reducing belongs to the one of half envelope flashboard assembly, and the flashboard assembly of reducing comprises gate panel body and seal; Seal comprises top glue core (15), anterior reducing glue core (7), and top glue core also claims top sealing, and anterior reducing glue core also claims front reducing to seal; The gate panel body of the flashboard assembly of reducing matches with top glue core, anterior reducing glue core, and the gate panel body of the flashboard assembly of its reducing is referred to as variable bore ram body; Anterior reducing glue core is made up of agent structure and external ear, its agent structure is the structure of semi-toroidal shape, left and right two head part of its agent structure protrude the external ear forming symmetrical bulk shape not laterally, thus, the head of its agent structure and external ear are interconnected to form the head of anterior reducing glue core, and anterior reducing glue core has two heads; Anterior reducing glue core comprises reducing colloid (16), ironware (19), parallels (22), motion bar (23), connecting rod (24); Reducing colloid is the carrier of ironware, parallels, motion bar, connecting rod, and ironware, parallels, motion bar, connecting rod are incorporated among reducing colloid respectively.Anterior reducing glue core comprises six ironwares, four parallels, two motion bars and two connecting rods; Anterior reducing glue core is by the disposable sulfuration and become an entirety in mould of six ironwares, four parallels, two motion bars and two connecting rods and rubber.Ironware is the structure of special-shaped cam, ironware is made up of two special-shaped cams and connector, the end of ironware is special-shaped cam, special-shaped cam comprises head, middle part and afterbody, special-shaped cam is the structure of narrow " V " shape leaf lobe shape of head, special-shaped cam has lateral surface (49) and medial surface (54), and lateral surface and the medial surface of special-shaped cam are parallel to each other, the outer wall (48) of the head of special-shaped cam is arc-shaped surface, the outer wall of the head of its special-shaped cam is respectively with the lateral surface of special-shaped cam with medial surface is crossing connects, there are two wall planes be connected that intersect vertically with lateral surface and medial surface respectively at the middle part of special-shaped cam, two wall plane apportion both sides, two wall planes are crossing with the two ends of the outer wall of head respectively to be connected, in two wall planes, the short wall plane of its length is referred to as shortwall plane, the wall plane that its length is long is referred to as longwell plane, the afterbody of special-shaped cam is convex-concave curved configuration, the afterbody of special-shaped cam comprises the outside wall surface (55) of " s " shape, the outside wall surface (51) of arc curve and tail wall plane (52), the outside wall surface of " s " shape, the outside wall surface of arc curve and tail wall plane are respectively with the lateral surface of special-shaped cam with medial surface is crossing is connected, one end of the outside wall surface of " s " shape connects longwell plane (53), the other end of the outside wall surface of " s " shape connects tail wall plane, one end of the outside wall surface of arc connects shortwall plane (50), the other end of the outside wall surface of arc connects tail wall plane, like this, tail wall interplanar is in the outside wall surface of " s " shape, between the outside wall surface of arc, and respectively with the outside wall surface of " s " shape, the outside wall surface of arc curve intersects and connects, the inner side being positioned at the affiliated plane of longwell plane of the outside wall surface of " s " shape, the protrusion of the outside wall surface of arc curve and be positioned at the outside of the affiliated plane of shortwall plane, like this, the interior angle of the affiliated plane of tail wall plane and the affiliated Plane intersects of shortwall plane is obtuse angle, and the interior angle of the affiliated plane of tail wall plane and the affiliated Plane intersects of longwell plane is acute angle, connector is flat bar structure, and connector has two lateral surfaces and two arc surfaces, and two lateral surfaces of connector are parallel to each other, and lateral surface is between two arc surfaces, and arc surface is crossing with two lateral surfaces respectively to be connected, connector two connects special-shaped cam respectively, the medial surface of special-shaped cam intersects vertically with connector and is connected, the center line of its connector is parallel and vertical with medial surface with the lateral surface of special-shaped cam with two lateral surfaces of connector respectively, and two special-shaped cams be positioned at respectively symmetrically connector two outside, an arc surface of connector and the head of special-shaped cam are in the same side, and another arc surface of connector and the afterbody of special-shaped cam are in the same side.Anterior reducing glue core has six ironwares, six ironwares are incorporated among reducing colloid respectively, six ironwares are spaced, evenly forward, ordered arrangement, the center line of the connector of its each ironware is parallel to each other and respectively on same circular arc, spacing distance between the center line of the connector of each ironware is identical, the lateral surface being positioned at the special-shaped cam of the same side of its each ironware at grade, the medial surface being positioned at the special-shaped cam of the same side of each ironware at grade, thus the assembly of the frame construction of six ironware formation semi-ring forms, assembly belongs to a part for anterior reducing glue core agent structure, two special-shaped cams of same ironware lay respectively at the skin of the both sides of anterior reducing glue core agent structure.It is inner that its ironware is longitudinally erected in reducing colloid, the head of the special-shaped cam of ironware is positioned at inner side, the afterbody of the special-shaped cam of ironware is positioned at outside, the head of ironware does not point to the arc core line of the circular arc at the center line place of the connector of each ironware, its arc core line refer to the circular arc at the center line place of the connector through its ironware arc core and respectively with the center line of the centerline parallel of the connector of each ironware, ironware is tiltedly to its arc core line, and the head of the special-shaped cam of ironware refers to the side of arc core line partially; Interval between the head of the special-shaped cam of its six ironwares is identical, and equally, the interval between the afterbody of the special-shaped cam of its six ironwares is identical.Parallels is rectangle structure, and there is through hole the centre of parallels, and its through hole has two relative inwall side planes be parallel to each other and two relative arc inner wall faces, and relative with two the respectively inwall side plane be parallel to each other in arc inner wall face is crossing to be connected; Motion bar is columniform bar, and it comprises mobile jib and bar head, and bar head has two, mobile jib two ends are connecting-rod cap respectively, mobile jib and bar head are respectively cylindrical shape, and the diameter of mobile jib is greater than the diameter of bar head, and the center line of mobile jib and bar head and motion bar on the same line.Connecting rod is interconnected to constitute by main body bar and major part, main body bar is cylindrical shape, there is through hole the outer end of the main body bar of its connecting rod, its through hole has two relative inwall side planes be parallel to each other and two relative arc inner wall faces, and relative with two the respectively inwall side plane be parallel to each other in arc inner wall face is crossing to be connected; Major part there are a medial plane and breach, its medial plane is parallel with the inwall side plane of the through hole of main body bar, its breach is the opening of the shape of arc side face, and the arc core line of the arc side face of its breach is parallel with medial plane, its arc core line and main body bar central axis.The glue plane that the head of anterior reducing glue core has two to be parallel to each other, wherein, a glue plane is front glue plane (17) before head, another glue plane back side after head is rear glue plane (25), the front glue plane of two heads of anterior reducing glue core at grade, its place plane is vertical with the longitudinally middle tangent plane of anterior reducing glue core, and the rear glue plane of two heads of anterior reducing glue core at grade.Its motion bar is longitudinally erected in the inside of the head of anterior reducing glue core, and be erected in the outside of assembly, the center line of the center line of motion bar and the connector of ironware is parallel to each other, the bar head of motion bar one end puts in the through hole of a parallels, the bar head of the motion bar other end puts in the through hole of another parallels, be connected between its motion bar and parallels, the center line of motion bar is vertical with the lateral surface of two parallels respectively, motion bar and connecting rod are interconnected, connecting rod links the mobile jib of motion bar by the breach on its major part, make the center line of main body bar and the central axis of motion bar of connecting rod, and the center line of the main body bar of connecting rod divides the vertical distance of the lateral surface being clipped to two parallels equal, the outer end (26) of the main body bar of connecting rod stretches out reducing colloid (16) backward, namely the rear glue plane of the head of anterior reducing glue core is stretched out, thus, its motion bar and two parallels be directly connected with its motion bar, connecting rod forms a grip assembly, one head of its anterior reducing glue core comprises a grip assembly, and another head of its anterior reducing glue core comprises another set of assembly, it is positioned at the lateral surface of two parallels of the same side of anterior reducing glue core at grade, the center line of the main body bar of two connecting rod is parallel to each other, and the center line of the main body bar of two connecting rods divides the vertical distance of the longitudinally middle tangent plane being clipped to anterior reducing glue core equal.The agent structure of anterior reducing glue core comprises the outer ring (46) of arc and semicircular inner ring, glue plane after connection two is intersected in outer ring, inner ring intersects the front glue plane of connection two, the arc core line of the arc core line of outer ring and the arc core line of inner ring and assembly is same straight line, and its arc core line is in plane belonging to the longitudinally middle tangent plane of anterior reducing glue core; Its inner ring is sandwiched between the affiliated plane of the medial surface of two special-shaped cams of same ironware, and in the middle of inner ring is longitudinal, the longitudinally middle tangent plane of tangent plane and anterior reducing glue core is same plane.The inner ring of the agent structure of anterior reducing glue core adopts semicircular inwall side face (21) inwardly to give prominence to the structure of the semi-ring body (20) of each special-shaped cam of assembly.Two heads of anterior reducing glue core, one for there being the head of two interfaces, one for there being the head of two guide grooves; At the head having two interfaces of anterior reducing glue core, two special-shaped cams of the ironware of one end of its assembly stretch out corresponding front glue plane respectively, the part of stretching out front glue plane of its special-shaped cam is a part for the head of its special-shaped cam, the part of stretching out front glue plane of its special-shaped cam is referred to as stretched head (28), stretched head is two, and the interface (18) of the head of its anterior reducing glue core is in front glue plane; At the head having two guide grooves of anterior reducing glue core, two special-shaped cams of the ironware of the other end of its assembly stretch out its front glue plane corresponding respectively, the part of stretching out front glue plane of its special-shaped cam is a part for the afterbody of its special-shaped cam, two special-shaped cams of the ironware of this end of its assembly respectively and produce the breach of two dihedrals between inner ring and front glue plane, its breach is guide groove (29), the part of stretching out front glue plane of the special-shaped cam of this end of its assembly is referred to as to stretch out tail (27), and stretching out tail is two; Its semi-ring body inwardly gives prominence to each special-shaped cam of assembly, its semi-ring body is sandwiched between the affiliated plane of the medial surface of two special-shaped cams of same ironware, semi-ring body longitudinally in the middle of tangent plane and anterior reducing glue core longitudinally in the middle of tangent plane be same plane, the head of two special-shaped cams of each ironware of assembly whole and the part at middle part that is inconjunction with thereof are respectively to the interior inwall side face tiltedly stretching out inner ring; Parallels protrudes the agent structure of anterior reducing glue core, be positioned at the outside of the affiliated plane of the lateral surface of special-shaped cam, interlaced between the special-shaped cam of parallels and the ironware in the head of anterior reducing glue core, partially overlap, its parallels is positioned at the skin of the head of anterior reducing glue core, and connect the head of the agent structure of anterior reducing glue core, parallels belongs to a part for external ear.Variable bore ram body (30) complements one another with seal and is connected.Variable bore ram body there is hatch frame, hatch frame (44) is positioned at the front portion of variable bore ram body, hatch frame and anterior reducing glue core adapt to, match, hatch frame comprises two opening sheets, the anteriomedial of opening sheet has the opening of arc, its opening both sides are respectively forward plane, two forward plane is crossing with the inner circumferential wall of the opening (40) of the arc of the anteriomedial of opening sheet respectively to be connected, two forward plane at grade, the arc core line of the inner circumferential wall of opening and the middle tangent plane of variable bore ram body are at grade, forward plane (43) is mutually vertical with the middle tangent plane of variable bore ram body, opening sheet has middle inner face and two side inner faces, two side inner faces lay respectively at the both sides of middle inner face, two side inner faces at grade, middle inner face is parallel with side inner face, middle inner face is mutually vertical with the arc core line of the inner circumferential wall of opening, middle inner face protrudes from side inner face, thus connected by side between its middle inner face and side inner face, its side is vertical with side inner face with middle inner face to be respectively connected, two opening sheets are respectively top opening sheet (36) and bottom opening sheet, the middle inner face of top opening sheet is relative with the middle inner face (34) of bottom opening sheet and be parallel to each other, the side inner face (47) of top opening sheet is relative with the side inner face (35) of bottom opening sheet and be parallel to each other, and the arc core line of the inner circumferential wall of the opening of two opening sheets on the same line, the inner circumferential wall of arc is had to connect between the middle inner face of two opening sheets, the inner circumferential wall of its arc is referred to as center peripheral wall surfaces, the arc core line of the arc core line of its center peripheral wall surfaces and the inner circumferential wall of opening on the same line, the diameter of its center peripheral wall surfaces is greater than the diameter of the inner circumferential wall of opening, center peripheral wall surfaces (41) is crossing with the middle inner face of two opening sheets respectively to be connected, there is inner plane the both sides of center peripheral wall surfaces respectively, two inner planes at grade, inner plane is parallel with forward plane, inner plane is crossing with center peripheral wall surfaces to be connected, be connected by interior lead angle between inner plane with side inner face, arc seal groove (33) is arranged at the top of variable bore ram body, arc seal groove comprises intermediate seal groove and side seal groove, two side seal grooves lay respectively at the both sides of intermediate seal groove, intermediate seal groove is connected with both sides sealing groove respectively, the degree of depth of intermediate seal groove is less than the degree of depth of side seal groove, the groove bottom of intermediate seal groove is parallel with the groove bottom of side seal groove, the groove bottom of intermediate seal groove is parallel with middle inner face, the groove bottom of side seal groove intersects vertically with inner plane and is connected, the vertical distance of the side inner face that the vertical distance of the groove bottom of the side seal groove side inner face of opening sheet is on earth the less than top opening sheet side inner face of opening sheet on earth, make the groove bottom of side seal groove, a breach is formed between the side inner face of inner plane and top opening sheet, inner plane (38) has the blind hole (39) connecting anterior reducing glue core, its blind hole center line is vertical with inner plane, the groove bottom of side seal groove has the blind hole (32) connecting top glue core, and its blind hole center line is vertical with the groove bottom of side seal groove, and two blind holes intersections communicate, the bottom opening sheet of variable bore ram body there are centering guiding oblique angle and centering gathering sill, bottom opening sheet has the water jacket (42) connecting centering guiding oblique angle, centering guiding oblique angle is fixedly connected on the water jacket at connection centering guiding oblique angle, and the fixed connection structure of centering guiding oblique angle and water jacket adopts headless screw syndeton, its bottom opening sheet there are two through holes, the center line of its through hole is vertical with the middle inner face on bottom opening sheet, two through hole communicates with water jacket respectively, its through hole is female thread structure, there are two internal thread holes matching corresponding with the through hole of two on bottom opening sheet at oblique angle to centering guiding, be fastenedly connected bottom opening sheet and centering guiding oblique angle respectively by headless screw, centering guiding oblique angle is fixedly connected on water jacket.Like this, anterior reducing glue core cooperatively interacts with variable bore ram body and is connected, its anterior reducing glue core pressure is sandwiched between the top opening sheet of the hatch frame of variable bore ram body and bottom opening sheet, and the main body bar that the connecting rod of reducing colloid is stretched out in the outer end of the main body bar of the connecting rod of anterior reducing glue core namely injects in the blind hole of connection anterior reducing glue core of variable bore ram body completely; Top glue core pressure is embedding to be sandwiched in the arc seal groove at the top of variable bore ram body, and the connecting rod stretching out the top colloid of top glue core of its top glue core injects in the blind hole of connection top glue core of variable bore ram body completely; The connecting rod of its top glue core is cooperatively interacted with the connecting rod of anterior reducing glue core be connected, namely the connecting rod of its top glue core injects in the through hole of the outer end of the main body bar of the connecting rod of anterior reducing glue core.Like this, its top glue core and anterior reducing glue core are attached on variable bore ram body respectively, and Jiao Xin two, top cooperatively interacts with two heads of anterior reducing glue core respectively and links together, and forms confined space, thus, form the flashboard assembly of reducing.The diameter of the inner circumferential wall of the arc of the opening sheet of variable bore ram body is greater than the diameter of the semi-ring body of anterior reducing glue core.Variable bore ram body there is box structure, box structure (31) is positioned at the back part of variable bore ram body, box structure matches with the pin thread structure of the outer end of piston rod, it is convex straight trough, it is made up of inside groove and water jacket, namely there is convex straight trough in the outside of variable bore ram body, horizontal break-through pedestal, its groove bottom is plane, convex straight trough comprises inside groove and water jacket, the width of its inside groove is greater than the width of water jacket, vertical distance between two groove sides of water jacket is identical with the vertical distance between two groove bottom of two groove structures at the top of the pin thread structure of the outer end of piston rod, the width of the groove structure groove bottom of the pin thread structure of the outer end of its piston rod is identical with the width of the groove side of the water jacket of the box structure of variable bore ram body, the pin thread structure top plane of the outer end of piston rod is identical to the degree of depth of the inside groove of the vertical distance of groove side adjacent with top plane of groove structure and the box structure of variable bore ram body, vertical distance between two side planes of the pin thread structure of the outer end of piston rod is equal with the vertical distance between two groove sides of the inside groove of the convex straight trough of the box structure of variable bore ram body, the flashboard assembly of reducing has two, and the flashboard assembly of two reducings complements one another into the flashboard assembly of a set of reducing, and like this, its corresponding top glue core has two, and two top glue cores complement one another into a set of top glue core, its corresponding anterior reducing glue core also has two, and two anterior reducing glue cores complement one another into a set of anterior reducing glue core, and in its a set of anterior reducing glue core, two anterior reducing glue cored structures are identical, variable bore ram body also has two, two a set of variable bore ram bodies of the supporting one-tenth of variable bore ram body, when the flashboard assembly of two reducings docks mutually, the flashboard assembly of two reducings of the flashboard assembly of a set of reducing complements each other to form a unified overall structure, namely in two variable bore ram bodies of a set of variable bore ram body, centering guiding oblique angle (45) on two variable bore ram bodies cooperatively interacts with centering gathering sill (37), its centering guiding oblique angle is made to inject mutually corresponding centering gathering sill, in two anterior reducing glue cores of a set of anterior reducing glue core, having the head of two interfaces and having the head of two guide grooves to cooperatively interact to dock respectively on two anterior reducing glue cores, its stretched head respectively on two anterior reducing glue cores and guide groove, stretch out tail and interface cooperatively interacts, stretched head is made to inject mutually corresponding guide groove, stretch out tail and inject mutually corresponding interface, and in its a set of anterior reducing glue core, the lateral surface being positioned at the special-shaped cam of the same side of each ironware of two anterior reducing glue cores at grade.The hydraulic flashboard blowout preventer of reducing sealing is bilateral symmetry, housing is a pair side through hole structure, one is to the flashboard assembly installing reducing in two of side through hole side through hole respectively, the flashboard assembly of the reducing in same a pair left and right side through hole of housing complements one another, relative between two, and in the through hole of the same side, the pin thread structure of the piston rod of its correspondence to inject in the box structure on the variable bore ram body of the flashboard assembly of reducing and mutually coincide, and the flashboard assembly of two reducing complemented one another is the flashboard assembly of a set of reducing; Port connection is tightly connected the hydraulic oil pipeline of hydraulic system, when the left and right cylinder barrel that hydraulic control system hydraulic oil enters the flashboard assembly controlling reducing closes chamber, promote piston-advance and drive the flashboard assembly of left and right reducing to move respectively to well head center along the side through hole of housing, the flashboard assembly of two reducings docks mutually, when tubing diameter is greater than the format diameter of anterior reducing glue core in its natural state, its multiple ironware ends contact, to the surface of oil pipe, creates mutual thrust (along oil pipe radial direction) simultaneously.The stressed extruding of ironware is outwards moved, simultaneously the connector of special-shaped cam structure produce rotary motion, inner ring contacts with the appearance of oil pipe and is extruded, when the active force (along oil pipe radial direction) extruded increases to the specification form that can change anterior reducing glue core, anterior reducing glue core is made to produce distortion, realize anterior reducing glue core reducing, thus the annular space closed between oil pipe and sleeve pipe, realize closing Oil/gas Well; When tubing diameter is less than anterior reducing glue core format diameter in its natural state, ironware and rubber are subject to the effect of variable bore ram body simultaneously, extruding is internally moved, oil pipe surface is formed and surrounds extruding, when the active force (along oil pipe radial direction) extruded can change the specification form of anterior reducing glue core, make anterior reducing glue core produce distortion, realize anterior reducing glue core reducing, thus the annular space closed between oil pipe and sleeve pipe, realize closing Oil/gas Well.When hydraulic oil enters cylinder barrel unlatching chamber, left and right, promote piston and retreat and drive the flashboard assembly of reducing to leaving the motion of well head center position, open Oil/gas Well, anterior reducing glue core returns to nature again.Flashboard assembly switch is controlled by the reversal valve of the hydraulic control unit of hydraulic system.

Claims

1. a hydraulic flashboard blowout preventer for reducing sealing, it is the well controlled blowout-proof device that oilfield downhole operation uses, it adopts hydraulic-driven, belongs to hydraulic flashboard blowout preventer, the hydraulic flashboard blowout preventer of reducing sealing comprises flashboard assembly, side door, side door bolt, the port connection of housing, hydraulic cylinder, reducing, and the hydraulic flashboard blowout preventer of reducing sealing also comprises sealing mechanism, the hydraulic flashboard blowout preventer of reducing sealing is bilateral symmetry, and namely its left side structure is identical and symmetrical with the specification framework of right side structure, housing comprises body and flange arrangement, body is rectangular structure, the center of body is the main through hole of hollow circular configuration, flange arrangement comprises neck flange and ring flange, housing there are two flange arrangements, two flange arrangements lay respectively at the both sides of body, the intermediate throughholes of two flange arrangement interlinks with main through hole respectively, the center line of flange arrangement and the center line of main through hole are on the same line, housing has two side through hole, side through hole communicates with main through hole respectively, its side through hole combines the structure that forms a pair of side through hole in pairs, a same side through hole to side through hole is positioned at main through hole side, another side through hole is positioned at main through hole opposite side, the center line of two side through hole on the same line and with the vertical and intersectant centerline of main through hole, hydraulic cylinder comprises cylinder barrel and cylinder cap, piston and piston rod, screw mandrel, cylinder barrel bolt and sealing device, piston rod is fixedly connected on the side of piston, the outer end of piston rod is pin thread structure, its top is plane, be referred to as top plane, the central axis of top plane and piston, the two sides that are connected with top plane are plane i.e. side plane, its two side plane respectively with top plane orthogonal, and be parallel to each other, the vertical range of center line that its two side plane arrives respectively piston is equal, between side plane and piston rod main body, fluted structure is connected, groove structure open at both ends, its groove structure comprises groove bottom and groove side, its groove bottom is parallel with side plane, its two grooves side is parallel to each other, and vertical with groove bottom, groove side is parallel with the top plane of piston rod, piston rod there is the blind hole of connection wire rod, the blind hole of connection wire rod and the central through hole of piston interlink, the blind hole of connection wire rod and the central through hole of piston and piston rod, the center line of piston on the same line, internal thread is had in the blind hole of the central through hole of piston and the connection wire rod linking together, screw mandrel comprises body and step, body is circular pin, the step of the outwardly annular of intermediate peripheral wall of body, its step separates leading portion and back segment screw mandrel body, the external diameter of leading portion is less than the external diameter of back segment, the leading portion of body there is male thread, between the side through hole of hydraulic cylinder, side door and housing, complement one another, the quantity correspondence of the side through hole of hydraulic cylinder, side door and housing is identical, between hydraulic cylinder and side door and housing, is connected, syndeton between hydraulic cylinder and side door and housing, namely piston rod packs in the middle hole of side door, piston is inserted in cylinder barrel, internal thread in the blind hole of the connection wire rod of the male thread on the leading portion of the body of screw mandrel and the central through hole of piston and the piston rod that links together screws and is connected, cylinder cap sealing shroud connects the back segment of the body of screw mandrel, the sealing device of hydraulic cylinder comprise sealing between the back segment of body of cylinder cap and screw mandrel and the sealing between cylinder cap and cylinder barrel and the sealing between side door and cylinder barrel,Sealing between piston rod and side door, sealing between piston rod and side door is divided into two parts, a part is sealed well pressure, a part is the oil pressure that sealing hydraulic control produces, twice sealing mechanism is between Zhe Liang department, for making the sealing at this place very reliable, there is the sealing ring of multiplet, and the auxiliary seal of middle O-ring seals; Side door itself is connected with housing by side door bolt, side door is positioned at the side through hole outside of housing, side door is covered on side through hole, and cylinder cap and cylinder barrel are fixed together by cylinder barrel bolt and side door, and the sealing between side door and cylinder barrel adopts y-shaped ring to realize two way seal; The sealing mechanism of the hydraulic flashboard blowout preventer of reducing sealing comprises sealing between side door and housing and the sealing of oil circuit; Two of this distribution in vivo of housing oil circuit hole independently separately, there are a collar extension and two oil circuit apertures in its oil circuit hole independently, collar extension is positioned on this outside, two oil circuit apertures lay respectively at the outside of same two side through hole to side through hole of housing, the oil circuit aperture in the oil circuit hole of the body of housing and the corresponding connection of oil circuit ostium of side door, the collar extension in the oil circuit hole of the body of its housing is fixedly connected with port connection; There are two oil circuit apertures in the outside of side through hole, and its two oil circuits aperture belongs to respectively two oil circuit holes, and its two oil circuit holes are respectively the oil circuit hole that oil circuit hole that control piston advances and control piston retreat; In cylinder cap body, have an oil circuit hole, cylinder cap body is pierced into from all sides that are connected corresponding to cylinder barrel, cylinder cap inner side in its oil circuit hole, and passes from the centre of cylinder cap inner side; Cylinder barrel has an oil circuit hole, the one oil circuit orifice sealing in the oil circuit aperture, all sides in cylinder cap oil circuit hole and the oil circuit hole of cylinder barrel joins, the oil circuit aperture of the centre of the inner side in the oil circuit hole of cylinder cap is led in cylinder barrel, the oil circuit hole of two break-through side doors is had in its side door, the two oil circuit apertures in an oil circuit hole of side door interlink with the oil circuit hole sealing that another oil circuit aperture in oil circuit hole and the control piston of housing of cylinder barrel advances respectively, and the oil circuit hole that another oil circuit hole of side door and the control piston of housing retreat seals and interlinks and lead in cylinder barrel; Each parts are successively installed connection according to program respectively and are completed, and have rubber seal rings for seal connection, form the oil circuit of independent completion sealing between its mutual direct-connected oil circuit aperture; The sealing of oil circuit comprises the sealing of the oil circuit hole collar extension of sealing between mutual direct-connected oil circuit aperture and port connection and housing; The flashboard assembly of the hydraulic flashboard blowout preventer equipment reducing of reducing sealing, the flashboard assembly of reducing belongs to the one of half envelope flashboard assembly; The flashboard assembly of reducing comprises gate panel body and seal; Seal comprises top glue core, anterior reducing glue core, and top glue core also claims top sealing, and anterior reducing glue core also claims front reducing sealing; The gate panel body of the flashboard assembly of reducing matches with top glue core, anterior reducing glue core, and the gate panel body of the flashboard assembly of its reducing is referred to as variable bore ram body; Anterior reducing glue core is made up of agent structure and external ear, its agent structure is the structure of semi-toroidal shape, left and right two head part of its agent structure are protruded the external ear that forms symmetrical bulk shape not laterally, thus, head and the external ear of its agent structure are interconnected to form the head of anterior reducing glue core, and anterior reducing glue core has two heads; Anterior reducing glue core comprise reducing colloid, ironware, parallels,Motion bar, connecting rod, the head of anterior reducing glue core has two glue planes that are parallel to each other, wherein, a glue plane is front glue plane before head, another glue plane back side after head is rear glue plane, the front glue plane of two heads of anterior reducing glue core at grade, its place plane is vertical with the longitudinal middle tangent plane of anterior reducing glue core, and the rear glue plane of two heads of anterior reducing glue core at grade, anterior reducing glue core comprises multiple ironwares, four parallels, two motion bars and two connecting rods, the agent structure of anterior reducing glue core comprises outer ring and the semicircular inner ring of arc, glue plane after two of connections are intersected in outer ring, inner ring intersects connection two front glue planes, the arc core line of the arc core line of outer ring and the arc core line of inner ring and assembly is same straight line, and its arc core line is in the affiliated plane of longitudinal middle tangent plane of anterior reducing glue core, variable bore ram body complements one another with seal and is connected, variable bore ram body there is hatch frame, hatch frame is positioned at the front portion of variable bore ram body, hatch frame and anterior reducing glue core adapt to, match, hatch frame comprises two opening sheets, the anteriomedial of opening sheet has the opening of arc, its opening both sides are respectively forward plane, two forward plane respectively with the crossing connection of inner circumferential wall of the opening of the arc of the anteriomedial of opening sheet, two forward plane at grade, the arc core line of the inner circumferential wall of opening and the middle tangent plane of variable bore ram body are at grade, forward plane is mutually vertical with the middle tangent plane of variable bore ram body, opening sheet has middle inner face and two side inner faces, two opening sheets are respectively top opening sheet and bottom opening sheet, the middle inner face of top opening sheet is relative with the middle inner face of bottom opening sheet and be parallel to each other, the side inner face of top opening sheet is relative with the side inner face of bottom opening sheet and be parallel to each other, and the arc core line of the inner circumferential wall of the opening of two opening sheets on the same line, the inner circumferential wall connection of arc is had between the middle inner face of two opening sheets, the inner circumferential wall of its arc is referred to as center peripheral wall surfaces, the arc core line of the arc core line of its center peripheral wall surfaces and the inner circumferential wall of opening on the same line, the diameter of its center peripheral wall surfaces is greater than the diameter of the inner circumferential wall of opening, center peripheral wall surfaces respectively with the crossing connection of middle inner face of two opening sheets, there is respectively inner plane the both sides of center peripheral wall surfaces, two inner planes at grade, inner plane is parallel with forward plane, inner plane connection crossing with center peripheral wall surfaces, between inner plane and side inner face, be connected by interior lead angle, arc seal groove is arranged at the top of variable bore ram body, arc seal groove comprises intermediate seal groove and side seal groove, two side seal grooves lay respectively at the both sides of intermediate seal groove, intermediate seal groove is connected with both sides sealing groove respectively, the degree of depth of intermediate seal groove is less than the degree of depth of side seal groove, the groove bottom of intermediate seal groove is parallel with the groove bottom of side seal groove, the groove bottom of intermediate seal groove is parallel with middle inner face, the groove bottom of side seal groove intersects vertically be connected with inner plane, the groove bottom of the side seal groove on earth vertical range of the side inner face of opening sheet is less than the side inner face vertical range of the side inner face of opening sheet on earth of top opening sheet, inner plane has the blind hole of the anterior reducing glue core of connection, its blind hole center line is vertical with inner plane,The groove bottom of side seal groove has the blind hole of connection top glue core, and its blind hole center line is vertical with the groove bottom of side seal groove, and two blind holes intersections communicate, the bottom opening sheet of variable bore ram body there are centering guiding oblique angle and centering gathering sill, bottom opening sheet has the water jacket at connection centering guiding oblique angle, centering guiding oblique angle is fixedly connected on water jacket, and the fixed connection structure of centering guiding oblique angle and water jacket adopts Welding Structure or adopts headless screw syndeton, when adopting headless screw syndeton, its bottom opening sheet there are two through holes, the center line of its through hole is vertical with the middle inner face on bottom opening sheet, two through hole communicates with water jacket respectively, its through hole is female thread structure, centering guiding has two internal thread holes that match corresponding with two through holes on bottom opening sheet on oblique angle, is fastenedly connected respectively bottom opening sheet and the centering oblique angle that leads by headless screw, and the centering oblique angle that leads is fixedly connected on water jacket, like this, anterior reducing glue core cooperatively interacts be connected with variable bore ram body, its anterior reducing glue core pressure is sandwiched between the top opening sheet and bottom opening sheet of hatch frame of variable bore ram body, and the main body bar of connecting rod that reducing colloid is stretched out in the outer end of the main body bar of the connecting rod of anterior reducing glue core namely injects in the blind hole of the anterior reducing glue of connection core of variable bore ram body completely, top glue core is pressed in the arc seal groove at the embedding top that is sandwiched in variable bore ram body, and the connecting rod of the top colloid that stretches out top glue core of its top glue core injects in the blind hole of connection top glue core of variable bore ram body completely, the connecting rod of its top glue core and the connecting rod of anterior reducing glue core are cooperatively interacted be connected, namely the connecting rod of its top glue core injects in the through hole of outer end of main body bar of connecting rod of anterior reducing glue core, like this, its top glue core and anterior reducing glue core are attached to respectively on variable bore ram body, and Jiao Xin two, top cooperatively interacts link together with two heads of anterior reducing glue core respectively, and forms confined space, thus, form the flashboard assembly of reducing, the diameter of the inner circumferential wall of the arc of the opening sheet of variable bore ram body be greater than anterior reducing glue core inner ring semicircular inwall side face diameter or be greater than the diameter of semi-ring body of anterior reducing glue core, variable bore ram body there is box structure, box structure is positioned at the back part of variable bore ram body, box structure matches with the pin thread structure of the outer end of piston rod, it is protruding straight trough, it is made up of inside groove and water jacket, namely there is protruding straight trough in the outside of variable bore ram body, laterally break-through pedestal, its groove bottom is plane, protruding straight trough comprises inside groove and water jacket, the width of its inside groove is greater than the width of water jacket, vertical range between two groove bottom of the vertical range between two groove sides of water jacket and two groove structures at the top of the pin thread structure of the outer end of piston rod is identical, the width of the groove structure groove bottom of the pin thread structure of the outer end of its piston rod is identical with the width of the groove side of the water jacket of the box structure of variable bore ram body, the pin thread structure top plane of the outer end of piston rod is identical to the degree of depth of the vertical range of groove side adjacent with top plane of groove structure and the inside groove of the box structure of variable bore ram body, vertical range between two groove sides of the vertical range between two side planes of the pin thread structure of the outer end of piston rod and the inside groove of the protruding straight trough of the box structure of variable bore ram body is equal,The flashboard assembly of reducing has two, and the flashboard assembly of two reducings complements one another into the flashboard assembly of a set of reducing, and like this, its corresponding top glue core has two, and two top glue cores complement one another into a set of top glue core, its corresponding anterior reducing glue core also has two, and two anterior reducing glue cores complement one another into a set of anterior reducing glue core, and in its a set of anterior reducing glue core, two anterior reducing glue cored structures are identical, variable bore ram body also has two, two a set of variable bore ram bodies of the supporting one-tenth of variable bore ram body, when the flashboard assembly of two reducings docks mutually, the flashboard assembly of two reducings of the flashboard assembly of a set of reducing complements each other to form a unified overall structure, namely in two variable bore ram bodies of a set of variable bore ram body, centering guiding oblique angle and centering gathering sill on two variable bore ram bodies cooperatively interact, its centering guiding oblique angle is made to inject mutually corresponding centering gathering sill, the hydraulic flashboard blowout preventer of reducing sealing is bilateral symmetry, housing is a pair of side through hole structure, one is to installing respectively the flashboard assembly of reducing in two of side through hole side through hole, on a same a pair of left side for housing, the flashboard assembly of the reducing in the through hole of right side complements one another, relative between two, and in the through hole of the same side, box structure on the variable bore ram body of the flashboard assembly of the pin thread structure reeve reducing of the piston rod of its correspondence is interior and mutually identical, the flashboard assembly that the flashboard assembly of two reducing complementing one another is a set of reducing, the be tightly connected hydraulic oil pipeline of hydraulic system of port connection, it is characterized in that: reducing colloid is the carrier of ironware, parallels, motion bar, connecting rod, ironware, parallels, motion bar, connecting rod are incorporated into respectively among reducing colloid, anterior reducing glue core is by the disposable sulfuration and become an entirety in mould of multiple ironwares, four parallels, two motion bars and two connecting rods and rubber, ironware is the structure of special-shaped cam, ironware is made up of two special-shaped cams and connector, the end of ironware is special-shaped cam, special-shaped cam comprises head, middle part and afterbody, special-shaped cam is the structure of narrow " V " shape leaf lobe shape of head, connector two connects respectively special-shaped cam, anterior reducing glue core has multiple ironwares, multiple ironwares are incorporated into respectively among reducing colloid, thus the assembly of the frame structure of multiple ironwares formation semi-ring forms, assembly belongs to a part for anterior reducing glue core agent structure, two special-shaped cams of same ironware lay respectively at the skin of the both sides of anterior reducing glue core agent structure, its ironware is longitudinally erected in reducing colloid inside, the head of the special-shaped cam of ironware is positioned at inner side, the afterbody of the special-shaped cam of ironware is positioned at outside, parallels is rectangle structure, there is through hole the centre of parallels, motion bar is columniform bar, it comprises mobile jib and bar head, bar head has two, connecting rod is interconnected to constitute by main body bar and major part, there is through hole the outer end of the main body bar of its connecting rod, major part there are a medial plane and breach, its motion bar is longitudinally erected in the inside of the head of anterior reducing glue core, and be erected in the outside of assembly, the bar head of motion bar one end puts in the through hole of a parallels, the bar head of the motion bar other end puts in the through hole of another parallels, between its motion bar and parallels, be connected, connecting rod is linked the mobile jib of motion bar by the breach on its major part,The outer end of the main body bar of connecting rod is stretched out reducing colloid backward, namely stretches out the rear glue plane of the head of anterior reducing glue core, thus, its motion bar and form a grip assembly with its motion bar direct-connected two parallels, connecting rods; One head of its anterior reducing glue core comprises a grip assembly, and another head of its anterior reducing glue core comprises another set of assembly; Parallels protrudes the agent structure of anterior reducing glue core, be positioned at the outside of the affiliated plane of the lateral surface of special-shaped cam, interlaced between the special-shaped cam of parallels and the ironware in the head of anterior reducing glue core, partially overlap, thus, its parallels is positioned at the skin of the head of anterior reducing glue core, and connect the head of the agent structure of anterior reducing glue core, parallels belongs to a part for external ear.

2. the hydraulic flashboard blowout preventer of reducing sealing according to claim 1, it is characterized in that: special-shaped cam has lateral surface and medial surface, lateral surface and the medial surface of special-shaped cam are parallel to each other, the outer wall of the head of special-shaped cam is arc-shaped surface, the outer wall of the head of its special-shaped cam is respectively with the lateral surface of special-shaped cam with medial surface is crossing connects, there are two wall planes be connected that intersect vertically with lateral surface and medial surface respectively at the middle part of special-shaped cam, two wall plane apportion both sides, two wall planes are crossing with the two ends of the outer wall of head respectively to be connected, in two wall planes, the short wall plane of its length is referred to as shortwall plane, the wall plane that its length is long is referred to as longwell plane, the afterbody of special-shaped cam is convex-concave curved configuration, the afterbody of special-shaped cam comprises the outside wall surface of " s " shape, the outside wall surface of arc curve and tail wall plane, the outside wall surface of " s " shape, the outside wall surface of arc curve and tail wall plane are respectively with the lateral surface of special-shaped cam with medial surface is crossing is connected, one end of the outside wall surface of " s " shape connects longwell plane, the other end of the outside wall surface of " s " shape connects tail wall plane, one end of the outside wall surface of arc connects shortwall plane, the other end of the outside wall surface of arc connects tail wall plane, like this, tail wall interplanar is in the outside wall surface of " s " shape, between the outside wall surface of arc, and respectively with the outside wall surface of " s " shape, the outside wall surface of arc curve intersects and connects, the inner side being positioned at the affiliated plane of longwell plane of the outside wall surface of " s " shape, the protrusion of the outside wall surface of arc curve and be positioned at the outside of the affiliated plane of shortwall plane, like this, the interior angle of the affiliated plane of tail wall plane and the affiliated Plane intersects of shortwall plane is obtuse angle, and the interior angle of the affiliated plane of tail wall plane and the affiliated Plane intersects of longwell plane is acute angle, connector is flat bar structure, and connector has two lateral surfaces and two arc surfaces, and two lateral surfaces of connector are parallel to each other, and lateral surface is between two arc surfaces, and arc surface is crossing with two lateral surfaces respectively to be connected, the medial surface of special-shaped cam intersects vertically with connector and is connected, the center line of its connector is parallel and vertical with medial surface with the lateral surface of special-shaped cam with two lateral surfaces of connector respectively, and two special-shaped cams be positioned at respectively symmetrically connector two outside, an arc surface of connector and the head of special-shaped cam are in the same side, and another arc surface of connector and the afterbody of special-shaped cam are in the same side.

3. the hydraulic flashboard blowout preventer of reducing sealing according to claim 1, it is characterized in that: multiple ironware is spaced, evenly forward, ordered arrangement, the center line of the connector of its each ironware is parallel to each other and respectively on same circular arc, spacing distance between the center line of the connector of each ironware is identical, the lateral surface being positioned at the special-shaped cam of the same side of its each ironware at grade, the medial surface being positioned at the special-shaped cam of the same side of each ironware at grade, the head of ironware does not point to the arc core line of the circular arc at the center line place of the connector of each ironware, its arc core line refer to the circular arc at the center line place of the connector through its each ironware arc core and respectively with the center line of the centerline parallel of the connector of each ironware, ironware is tiltedly to its arc core line, the head of the special-shaped cam of ironware refers to the side of arc core line partially, interval between the head of the special-shaped cam of its multiple ironware is identical, and equally, the interval between the afterbody of the special-shaped cam of its multiple ironware is identical.

4. the hydraulic flashboard blowout preventer of reducing sealing according to claim 1, it is characterized in that: the through hole in the middle of its parallels has two relative inwall side planes be parallel to each other and two relative arc inner wall faces, relative with two the respectively inwall side plane be parallel to each other in arc inner wall face is crossing to be connected; The mobile jib two ends connecting-rod cap respectively of motion bar, mobile jib and bar head are respectively cylindrical shape, and the diameter of mobile jib is greater than the diameter of bar head, and the center line of mobile jib and bar head and motion bar is on the same line; The main body bar of connecting rod is cylindrical shape, the through hole of the outer end of the main body bar of its connecting rod has two relative inwall side planes be parallel to each other and two relative arc inner wall faces, and relative with two the respectively inwall side plane be parallel to each other in arc inner wall face is crossing to be connected; The medial plane of its connecting rod is parallel with the inwall side plane of the through hole of main body bar, and the breach of its connecting rod is the opening of the shape of arc side face, and the arc core line of the arc side face of its breach is parallel with medial plane, its arc core line and main body bar central axis.

5. the hydraulic flashboard blowout preventer of reducing sealing according to claim 1, it is characterized in that: the center line of the center line of motion bar and the connector of ironware is parallel to each other, the center line of motion bar is vertical with the lateral surface of two parallels respectively, motion bar and connecting rod are interconnected, make the center line of main body bar and the central axis of motion bar of connecting rod, and the center line of the main body bar of connecting rod divides the vertical distance of the lateral surface being clipped to two parallels equal, it is positioned at the lateral surface of two parallels of the same side of anterior reducing glue core at grade; The center line of the main body bar of two connecting rod is parallel to each other, and the center line of the main body bar of two connecting rods divides the vertical distance of the longitudinally middle tangent plane being clipped to anterior reducing glue core equal.

6. the hydraulic flashboard blowout preventer of reducing sealing according to claim 1, it is characterized in that: its inner ring is sandwiched between the affiliated plane of the medial surface of two special-shaped cams of same ironware, in the middle of inner ring is longitudinal, the longitudinally middle tangent plane of tangent plane and anterior reducing glue core is same plane, the inner ring of the agent structure of anterior reducing glue core adopts the structure of semicircular inwall side face or adopts semicircular inwall side face inwardly to give prominence to the structure of the semi-ring body of each special-shaped cam of assembly, two heads of anterior reducing glue core, one for there being the head of two interfaces, one for there being the head of two guide grooves, at the head having two interfaces of anterior reducing glue core, two special-shaped cams of the ironware of one end of its assembly stretch out corresponding front glue plane respectively, the part at middle part that the part of stretching out front glue plane of its special-shaped cam is the whole of a part for the head of its special-shaped cam or the head of the head of special-shaped cam and the part at middle part or special-shaped cam and is inconjunction with, the part of stretching out front glue plane of its special-shaped cam is referred to as stretched head, stretched head is two, and the interface of the head of its anterior reducing glue core is in front glue plane, at the head having two guide grooves of anterior reducing glue core, two special-shaped cams of the ironware of the other end of its assembly stretch out its front glue plane corresponding respectively, the part of stretching out front glue plane of its special-shaped cam is the part of the afterbody of its special-shaped cam or the afterbody of special-shaped cam and the part at middle part, two special-shaped cams of the ironware of this end of its assembly respectively and produce the breach of two dihedrals between inner ring and front glue plane, its breach is guide groove, the part of stretching out front glue plane of the special-shaped cam of this end of its assembly is referred to as to stretch out tail, and stretching out tail is two, when the inner ring of the agent structure of anterior reducing glue core adopts the structure of semicircular inwall side face, each special-shaped cam of the inside outstanding assembly of its inner ring, when the inner ring of the agent structure of anterior reducing glue core adopts semicircular inwall side face inwardly to give prominence to the structure of the semi-ring body of each special-shaped cam of assembly, its semi-ring body inwardly gives prominence to each special-shaped cam of assembly, its semi-ring body is sandwiched between the affiliated plane of the medial surface of two special-shaped cams of same ironware, in the middle of semi-ring body is longitudinal, the longitudinally middle tangent plane of tangent plane and anterior reducing glue core is same plane, a part for the head of two special-shaped cams of each ironware of assembly or the head of the head of two special-shaped cams and the part at middle part or two special-shaped cams whole and the part at middle part that is inconjunction with thereof are respectively to the interior inwall side face tiltedly stretching out inner ring.

7. the hydraulic flashboard blowout preventer of reducing sealing according to claim 1, it is characterized in that: two side inner faces of opening sheet lay respectively at the both sides of middle inner face, two side inner faces at grade, middle inner face is parallel with side inner face, middle inner face is mutually vertical with the arc core line of the inner circumferential wall of opening, middle inner face protrudes from side inner face, thus is connected by side between its middle inner face and side inner face, and its side is vertical with side inner face with middle inner face to be respectively connected; Make to form a breach between the side inner face of the groove bottom of side seal groove, inner plane and top opening sheet.

8. the hydraulic flashboard blowout preventer of reducing sealing according to claim 1, it is characterized in that: when the flashboard assembly of two reducings docks mutually, in its a set of anterior reducing glue core, the lateral surface being positioned at the special-shaped cam of the same side of each ironware of two anterior reducing glue cores at grade; Simultaneously, in two anterior reducing glue cores of a set of anterior reducing glue core, having the head of two interfaces and having the head of two guide grooves to cooperatively interact to dock respectively on two anterior reducing glue cores, its stretched head and guide groove respectively on two anterior reducing glue cores, stretch out tail and interface cooperatively interacts, make stretched head inject mutually corresponding guide groove, stretch out tail and inject mutually corresponding interface.