CN105781468A - Wellhead polish rod sealing device with blowout preventing valve - Google Patents
Wellhead polish rod sealing device with blowout preventing valve Download PDFInfo
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- CN105781468A CN105781468A CN201610118425.1A CN201610118425A CN105781468A CN 105781468 A CN105781468 A CN 105781468A CN 201610118425 A CN201610118425 A CN 201610118425A CN 105781468 A CN105781468 A CN 105781468A
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- Prior art keywords
- main body
- blowout prevention
- prevention valve
- filling
- ball
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- 238000007789 sealing Methods 0.000 title claims abstract description 58
- 238000012856 packing Methods 0.000 claims abstract description 29
- 230000000694 effects Effects 0.000 claims abstract description 7
- 230000002265 prevention Effects 0.000 claims description 99
- 239000000945 filler Substances 0.000 claims description 18
- 229950000845 politef Drugs 0.000 claims description 6
- 239000012530 fluid Substances 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 3
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 7
- 239000010779 crude oil Substances 0.000 description 5
- 238000005299 abrasion Methods 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 238000011084 recovery Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
- E21B33/06—Blow-out preventers, i.e. apparatus closing around a drill pipe, e.g. annular blow-out preventers
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/02—Valve arrangements for boreholes or wells in well heads
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Sealing Devices (AREA)
Abstract
The invention provides a wellhead polish rod sealing device with a blowout preventing valve. The wellhead polish rod sealing device comprises a blowout preventing section and a sealing section which are sequentially connected up and down, wherein the blowout preventing section and the sealing section communicate to form a penetrated polish rod passage; the sealing section comprises a hollow main body, a first-class sealing structure and a second-class sealing structure, wherein the first-class sealing structure comprises a sealing casing, a filling block and a driving part, the sealing casing which is perpendicular to the main body and is axially and convexly arranged communicates with an inner cavity of the main body, and the filling block in the sealing casing is driven by the driving part to move to achieve a sealing effect with the polish rod; the second-class sealing structure comprises a packing main body, a pressing cap and one or more filling balls wrapping the polish rod in a sealing manner, wherein the pressing cap, the packing main body and the main body are sequentially connected up and down, and one or more spherical grooves which are matched with the filling balls are formed in the inner surface between the main body and the pressing cap. The wellhead polish rod sealing device with the blowout preventer valve, provided by the invention, adopts a two-class sealing structure, so that the filling block and the filling balls can be prevented from being taken out by the polish rod, the service life of the sealing structure is prolonged, and the number of times of changing operations is reduced.
Description
Technical field
The present invention relates to technical field of petroleum extraction, particularly to a kind of wellhead polish rod sealing device with blowout prevention valve.
Background technology
At present, China's major part oil field has been enter into the mechanical oil recovery stage.The capital equipment adopted in mechanical oil recovery is sucker rod pumping equipment, and in sucker rod pumping equipment, wellhead polish rod sealing device is indispensable key equipment.
But along with the development in oil field, the exploitation of the complexity of hole condition and viscous crude, super-viscous oil, pumping well polish rod bears load and becomes big, there is the hidden danger of polished rod fracture under the factors such as alternate stress, fatigue, gas-liquid corrosion.Polished rod ruptures the oil well stopping production fault that causes, has that contaminated area is big, stops well time length, feature that economic loss is serious.At present, conventional polish rod seal device is difficult to meet the requirement of polished rod fracture blowout prevention, although a kind of polish rod seal device with eccentric abrasion prevention and anti-gusher function disclosed in Chinese patent, but it exists that sealing life is short and the shortcoming such as blowout prevention effect reaction is slow.
Summary of the invention
It is an object of the invention to provide a kind of simple in construction, there is blowout prevention function and sealing life length the wellhead polish rod sealing device with blowout prevention valve.
For reaching above-mentioned purpose, the present invention proposes a kind of wellhead polish rod sealing device with blowout prevention valve, at least includes:
The blowout prevention section connected successively from top to bottom and seal section, axially have along described blowout prevention section and described seal section and can hold the polished rod passage that polished rod runs through, and wherein, described seal section includes:
The main body of hollow；
Primary seal structure, at least include seal casinghousing, filling block and driver part, described seal casinghousing along be perpendicular to described main body axial projection and with the intracavity inter-connection of described main body, described filling block is located in described seal casinghousing and can along being perpendicular to moving axially of described main body, the side of described filling block is towards described polished rod passage, its opposite side connects with described driver part, and described filling block can be moved to described polished rod passage by described driver part and be combined with described polished rod seal；
Secondary seal structure, at least include packing main body, pressure cap and more than one sealed envelope in the filling ball in the outside of described polished rod, described pressure cap connects successively up and down with described packing main body, described packing main body is located at the top of described main body, inner surface between top and the bottom of described pressure cap of described main body is provided with more than one ball recess, and described filling ball is located at the inside of described ball recess and matches with described ball recess.
Wellhead polish rod sealing device with blowout prevention valve as above, wherein, filler seat it is provided with in described seal casinghousing, the side of described filler seat connects with the side of described driver part, the opposite side of described filler seat connects with described filling block, and the outside of described filler seat is formed with the inwall of described seal casinghousing and threadeds.
Wellhead polish rod sealing device with blowout prevention valve as above, wherein, after described filling block is combined with described polished rod seal, is linked together described filler seat and described seal casinghousing by holding screw.
Wellhead polish rod sealing device with blowout prevention valve as above, wherein, described secondary seal structure includes a described filling ball, the inside of the described ball recess that the inner surface bottom on inner surface top and described packing main body that described filling ball is located at described main body cooperatively forms.
Wellhead polish rod sealing device with blowout prevention valve as above, wherein, described secondary seal structure includes two described filling balls, the inside of the described ball recess that the inner surface bottom on inner surface top and described packing main body that one described filling ball is positioned at described main body cooperatively forms, the inside of the described ball recess that the inner surface bottom on inner surface top and described pressure cap that another described filling ball is positioned at described packing main body cooperatively forms.
Wellhead polish rod sealing device with blowout prevention valve as above, wherein, described filling ball includes the first half filling balls and the second half filling balls, the buckling surface of described the first half filling balls connects with the buckling surface of described the second half filling balls, the buckling surface of described the first half filling balls is provided with at least one groove and at least one is protruding, the buckling surface of described the second half filling balls is provided with the described groove that the projection with the described projection of the fit depressions of the buckling surface of described the first half filling balls with the buckling surface of described the first half filling balls matches, described the first half filling balls and linking together that described the second half filling balls fasten.
Wellhead polish rod sealing device with blowout prevention valve as above, wherein, the inwall of described filling ball is provided with multiple annular groove, and multiple described annular grooves are arranged along the axially spaced-apart of described polished rod.
Wellhead polish rod sealing device with blowout prevention valve as above, wherein, the described wellhead polish rod sealing device with blowout prevention valve also includes ball joint and lower contact, described ball joint is connected to the bottom of described main body, and the spherical inner groovy rotatable engagement that the spherical termination of described ball joint is offered with the upper end of described lower contact is connected.
Wellhead polish rod sealing device with blowout prevention valve as above, wherein, described blowout prevention section includes:
Blowout prevention valve main body, the upper end of described blowout prevention valve main body has Baltimore groove, and described blowout prevention valve main body is located at the top of described pressure cap；
Flow guide sleeve, described flow guide sleeve is the tubular structure that surrounding is evenly arranged pod apertures, and the outer wall of described flow guide sleeve is formed with the inwall epimere of described blowout prevention valve main body and threadeds；
Blowout prevention valve upper cover, the center of described blowout prevention valve upper cover has through hole, the centre bore of the epimere of described blowout prevention valve upper cover is converging transition from top to bottom, the centre bore of the hypomere of described blowout prevention valve upper cover is isometrical section, the epimere of described blowout prevention valve main body connects with the hypomere of described blowout prevention valve upper cover, and described blowout prevention valve main body extends to the inside of hypomere centre bore of described blowout prevention valve upper cover and is configured to hold the chamber of ball sealer with described blowout prevention valve upper cover, described ball sealer matches with the Baltimore groove of the upper end of described blowout prevention valve main body, described ball sealer under fluid pressure effect can on move and shut the centre bore of epimere of described blowout prevention valve upper cover.
Wellhead polish rod sealing device with blowout prevention valve as above, wherein, described ball sealer is the ball sealer of politef.
Compared with prior art, the invention have the advantages that
1, the seal section of the present invention is that two-stage seals structure, primary seal structure make filling block be combined with polished rod seal by the movement of driver part, ensure that the sealing effectiveness of primary seal structure can improve at any time, simultaneously, filling block connects with driver part, it is possible to prevent filling block to be pumped by polished rod and take out of, extend the life-span of primary seal structure, ball sealer in secondary seal structure is located at the inside of ball recess and matches with ball recess, filling ball can be stoped to be pumped by polished rod and take out of, extend the life-span of secondary seal structure, realize extending the life-span sealing structure, reduce and change operations number.
2, filler seat is connected with seal casinghousing by the present invention by holding screw, can avoid, because filling block rotates the filling block caused and polished rod eccentric wear, extending the life-span of primary seal structure.
3, the ball joint of the present invention is connected with well head by lower contact, forms ball-type and compensates connection, can the angle of deviation brought of the compensation well head of comprehensive free angle or hole deviation.
4, the filling ball of the present invention is the first half filling balls and the first half filling balls fasten links together, and filling ball is without being inserted in from polished rod, during as changed filling ball, it may be achieved does not stop well and changes.
5, the flow guide sleeve of the present invention is the tubular structure that surrounding is evenly arranged pod apertures, pod apertures has the effect that pressure amplifies, once leak, the crude oil after pod apertures is boosted can by ball sealer jack-up, ball sealer moves and shuts the centre bore of blowout prevention valve upper cover epimere, it is achieved the effect of blowout prevention；Ball sealer adopts politef material simultaneously, has high-strength low-density, and response time is short, the advantage that closing motion is fast.
Accompanying drawing explanation
Accompanying drawing described here only for illustrative purposes, and is not intended to limit scope disclosed by the invention by any way.It addition, the shape of each parts in figure and proportional sizes etc. are only schematic, it is adapted to assist in the understanding of the present invention, is not the shape and the proportional sizes that specifically limit each parts of the present invention.Those skilled in the art is under the teachings of the present invention, it is possible to select various possible shape and proportional sizes to implement the present invention as the case may be.
Fig. 1 is the structural representation of the wellhead polish rod sealing device with blowout prevention valve of the present invention；
Fig. 2 is the structural representation of filling ball of the present invention；
Fig. 3 is filling ball of the present invention and polished rod fit structure sectional view.
Description of reference numerals:
1-main body；2-primary seal structure；21-seal casinghousing；22-driver part；23-filling block；24-filler seat；25-holding screw；26-attachment screw；27-plug；3-secondary seal structure；31-packing main body；32-pressure cap；33-filling ball；331-the first half filling ball；332-the second half filling ball；4-ball recess；5-ball joint；6-lower contact；7-nut；8-blowout prevention valve main body；9-flow guide sleeve；10-blowout prevention valve upper cover；11-ball sealer；12-chamber；13-polished rod；14-annular groove.
Detailed description of the invention
Description in conjunction with accompanying drawing and the specific embodiment of the invention, it is possible to clearly understand the details of the present invention.But, the detailed description of the invention of invention described herein, only for illustrative purpose, and can not be understood as by any way is limitation of the present invention.Under the teachings of the present invention, technical staff is it is contemplated that based on the arbitrarily possible deformation of the present invention, these are regarded as belonging to the scope of the present invention.
Fig. 1 to Fig. 3 respectively structural representation of the wellhead polish rod sealing device with blowout prevention valve of the present invention, the structural representation of filling ball of the present invention and filling ball of the present invention and polished rod fit structure sectional view.
nullAs shown in Figure 1，Wellhead polish rod sealing device with blowout prevention valve of the present invention at least includes the blowout prevention section and the seal section that connect successively from top to bottom，Blowout prevention section and seal section axially have can hold the polished rod passage that polished rod 13 (shown in Fig. 2) runs through，Seal section includes the main body 1 of hollow、Primary seal structure 2 and secondary seal structure 3，Primary seal structure 2 at least includes seal casinghousing 21、Driver part 22 and filling block 23，Seal casinghousing 21 is along being perpendicular to the axially arranged of main body 1 intracavity inter-connection with main body 1，Filling block 23 is located at the inside of seal casinghousing 21 and can be perpendicular to moving axially of main body 1 in edge，The side of filling block 23 is towards polished rod passage，The opposite side of filling block 23 connects with driver part 22，Filling block 23 can pass through driver part 22 and moves to polished rod passage and seal combination in polished rod 13，Thus realizing adjusting at any time the sealing effectiveness of primary seal structure 2；Secondary seal structure 3 at least includes packing main body 31, pressure cap 32 and more than one sealed envelope in the filling ball 33 in the outside of polished rod 13, pressure cap 32 connects successively up and down with packing main body 31, packing main body 31 is located at the top of main body 1, inner surface between top and the bottom of pressure cap 32 of main body 1 is provided with more than one ball recess 4, filling ball 33 is located at the inside of ball recess 4 and matches with ball recess 4, takes out of to realize preventing filling ball 33 ball from being pumped by polished rod 13.The seal section of the wellhead polish rod sealing device with blowout prevention valve of the present invention adopts two-stage to seal structure, filling block 23 in primary seal structure 2 connects with driver part 22, it is possible to prevent filling block 23 to be pumped by polished rod 13 and take out of, be conducive to extending the life-span of primary seal structure 2, make filling block 23 move by driver part 22 and seal combination to polished rod 13, it is possible to achieve improve the sealing effectiveness of primary seal structure 2 at any time；Meanwhile, the filling ball 33 of secondary seal structure 3 is located at the inside of ball recess 4 and matches with ball recess 4, it is possible to achieve prevent filling ball 33 from being pumped by polished rod 13 and taking out of, is conducive to extending the life-span of secondary seal structure 3.
Further, filler seat 24 it is provided with in seal casinghousing 21, the side of filler seat 24 connects with the side of driver part 22, by attachment screw 26, the opposite side of filler seat 24 and filling block 23 are linked together, the outer wall of filler seat 24 is formed with the inwall of seal casinghousing 21 and threadeds, and is pumped by polished rod 13 and takes out of further ensuring against filling block 23.
Further, filling block 23 and polished rod 13 seal after combining, by holding screw 25, filler seat 24 and seal casinghousing 21 are linked together, the abrasion preventing filling block 23 from rotating the filling block 23 caused that rubs between polished rod 13 can be realized, gap between driver part 22 and seal casinghousing 21 is provided with plug 27, to realize further improving the sealing effectiveness of primary seal structure 2.
Further, secondary seal structure 3 includes a filling ball 33, the inside of the ball recess 4 that the inner surface bottom on inner surface top and packing main body 31 that filling ball 33 is located at main body 1 cooperatively forms, it is achieved change filling ball 33 easily.
Further, secondary seal structure 3 includes two filling balls 33, the inside of the ball recess 4 that the inner surface bottom on inner surface top and packing main body 31 that one filling ball 33 is located at main body 1 cooperatively forms, the inside of the ball recess 4 that the inner surface bottom on inner surface top and pressure cap 32 that another filling ball 33 is located at packing main body 31 cooperatively forms, to improve the sealing property of secondary seal structure 3, realize replacing filling ball 33 efficiently simultaneously.
nullFurther，As shown in Figure 2，Filling ball 33 includes the first half filling balls 331 and the second half filling balls 332，The buckling surface of the buckling surface of the first half filling balls 331 and the second half filling balls 332 connects，The buckling surface of the first half filling balls 331 is provided with at least one groove and at least one is protruding，Projection that the buckling surface of the second half filling balls 332 is provided with the fit depressions of the buckling surface with the first half filling balls 331 and the groove matched with the projection of the buckling surface of the first half filling balls 331，What the first half filling balls 331 and the second half filling balls 332 fastened links together，Make it possible to achieve filling ball 33 and do not stop well replacing，The assembling mode of filling ball 33 is for being fastened and connected，Without being inserted in from polished rod 13，When needing to change filling ball 33，Have only to the connection screw thread unclamping between packing main body 31 and pressure cap 32，Pressure cap 32 and pressure cap 32 above section will be moved，New filling ball 33 is fastened on polished rod 13，Then pressure cap 32 and pressure cap 32 above section are transferred，Again the connection screw thread between packing main body 31 and pressure cap 32 is tightened，When changing the filling ball 33 of lower section，Have only to the connection screw thread unclamping between packing main body 31 and main body 1，Packing main body 31 and packing main body 31 above section will be moved，New filling ball 33 is fastened on polished rod 13，Then packing main body 31 and packing main body 31 above section are transferred，Again the connection screw thread between packing main body 31 and main body 1 is tightened.
Further, as it is shown on figure 3, be provided with multiple annular groove 14 on the inwall of described filling ball 33, multiple annular grooves 14 are arranged along the axially spaced-apart of polished rod 13, the oil droplet that can realize the trace leakage of filling ball 33 place is trapped in the inside of annular groove 14, with the oil droplet contaminated environment preventing trace from revealing.
Further, wellhead polish rod sealing device with blowout prevention valve also includes ball joint 5 and lower contact 6, ball joint 5 is connected to the bottom of described main body 1, the spherical inner groovy rotatable engagement that the spherical termination of ball joint 5 is offered with the upper end of lower contact 6 is connected, the external screw thread of ball joint 5 and the external thread sleeve of lower contact 6 are connected to nut 7, well head is by together with lower contact 6 is rotatably attached to ball joint 5, connecting thus forming spherical compensation, reaching the purpose compensating the angle of deviation that well head or hole deviation are brought of comprehensive free angle.
Further, blowout prevention section includes blowout prevention valve main body 8, flow guide sleeve 9, blowout prevention valve upper cover 10 and ball sealer 11, and blowout prevention valve main body 8 upper end has Baltimore groove, and blowout prevention valve main body 8 is located at the top of pressure cap 32；Flow guide sleeve 9 is evenly arranged the tubular structure of pod apertures for surrounding, and the outer wall of flow guide sleeve 9 is formed with the inwall epimere of blowout prevention valve main body 8 and threadeds；nullThe center of blowout prevention valve upper cover 10 has through hole，The upper section central hole of blowout prevention valve upper cover 10 is converging transition from top to bottom，The hypomere centre bore of blowout prevention valve upper cover 10 is isometrical section，The epimere of blowout prevention valve main body 8 connects with the hypomere of described blowout prevention valve upper cover 10，And blowout prevention valve main body 8 extend to blowout prevention valve upper cover 10 hypomere centre bore inside and with blowout prevention valve upper cover 10 be configured to hold ball sealer 11 chamber 12，Ball sealer 11 matches with the Baltimore groove of the upper end of blowout prevention valve main body 8，Ball sealer 11 under fluid pressure effect can on move and shut the upper section central hole of blowout prevention valve upper cover 10，The inner flow passage of the pod apertures of flow guide sleeve 9 and blowout prevention valve main body 8 forms the unlatching passage of ball sealer 11，The pod apertures of flow guide sleeve 9 has the function that pressure amplifies，Once the crude oil leakage that polished rod 13 fracture causes occurs，Crude oil after the pod apertures of flow guide sleeve 9 is boosted can by ball sealer 11 jack-up，Ball sealer 11 blocks the upper section central hole of blowout prevention valve upper cover 10，Thus realizing the function of blowout prevention.
Further, ball sealer 11 is the ball sealer of politef, and the ball sealer of politef has the feature of high-strength low-density, when polished rod 13 ruptures, the centre bore of the epimere of blowout prevention valve upper cover 10 shut rapidly by the ball sealer of politef, quickly to realize the function of blowout prevention.
nullIn use，Can filling block 23 be made to move in polished rod passage by the movement of driver part 22 and seal in polished rod 13 to combine，To improve the sealing property of primary seal structure 2，Filling block 23 and polished rod 13 seal after combining，By holding screw 25, filler seat 24 and seal casinghousing 21 are linked together，Thus realizing the abrasion preventing filling block 23 from rotating the filling block 23 caused that rubs between polished rod 13，The sealed envelope filling ball 33 in the outside of polished rod 13 is located at the inside of ball recess 4 and matches with ball recess 4，Take out of to realize preventing filling ball 33 ball from being pumped by polished rod 13，Extend the life-span of secondary seal structure 3，Simultaneously，Well head is by together with lower contact 6 is rotatably attached to ball joint 5，Form spherical compensation to connect，Reach the purpose compensating the angle of deviation that well head or hole deviation are brought of comprehensive free angle.
In use, it is replaced if desired for filling ball 33, owing to the assembling mode of filling ball 33 is for being fastened and connected, without being inserted in from polished rod 13, can realizing not stopping well when needing to change filling ball 33 to change, once the crude oil leakage that polished rod 13 fracture causes occurs, the crude oil after the pod apertures of flow guide sleeve 9 is boosted can by ball sealer 11 jack-up, ball sealer 11 blocks the upper section central hole of blowout prevention valve upper cover 10, thus realizing the function of blowout prevention.
Explaining in detail for the respective embodiments described above, it makes an explanation only for purpose of to the present invention, so that better understood when the present invention, but, these describe can not be limitation of the present invention with any explanation one-tenth, particularly, each feature described in various embodiments can also combination in any mutually, thus forming other embodiments, except there being clearly contrary description, these features should be understood can be applied in any one embodiment, and is not limited merely to described embodiment.
Claims (10)
1. the wellhead polish rod sealing device with blowout prevention valve, at least include the blowout prevention section and the seal section that connect successively from top to bottom, described blowout prevention section be connected with described seal section be formed with up/down perforation can hold the polished rod passage that polished rod runs through, it is characterised in that described seal section includes:
The main body of hollow；
Primary seal structure, at least include seal casinghousing, filling block and driver part, described seal casinghousing along be perpendicular to described main body axial projection and with the intracavity inter-connection of described main body, described filling block is located in described seal casinghousing and can along being perpendicular to moving axially of described main body, the side of described filling block is towards described polished rod passage, its opposite side connects with described driver part, and described filling block can be moved to described polished rod passage by described driver part and be combined with described polished rod seal；
Secondary seal structure, at least include packing main body, pressure cap and more than one sealed envelope in the filling ball in the outside of described polished rod, described pressure cap connects successively up and down with described packing main body, described packing main body is located at the top of described main body, inner surface between top and the bottom of described pressure cap of described main body is provided with more than one ball recess, and described filling ball is located at the inside of described ball recess and matches with described ball recess.
2. the wellhead polish rod sealing device with blowout prevention valve as claimed in claim 1, it is characterized in that, filler seat it is provided with in described seal casinghousing, the side of described filler seat connects with the side of described driver part, the opposite side of described filler seat connects with described filling block, and the outside of described filler seat is formed with the inwall of described seal casinghousing and threadeds.
3. the wellhead polish rod sealing device with blowout prevention valve as claimed in claim 2, it is characterised in that after described filling block is combined with described polished rod seal, by holding screw, described filler seat and described seal casinghousing are linked together.
4. the wellhead polish rod sealing device with blowout prevention valve as claimed any one in claims 1 to 3, it is characterized in that, described secondary seal structure includes a described filling ball, the inside of the described ball recess that the inner surface bottom on inner surface top and described packing main body that described filling ball is located at described main body cooperatively forms.
5. the wellhead polish rod sealing device with blowout prevention valve as claimed any one in claims 1 to 3, it is characterized in that, described secondary seal structure includes two described filling balls, the inside of the described ball recess that the inner surface bottom on inner surface top and described packing main body that one described filling ball is positioned at described main body cooperatively forms, the inside of the described ball recess that the inner surface bottom on inner surface top and described pressure cap that another described filling ball is positioned at described packing main body cooperatively forms.
6. the wellhead polish rod sealing device with blowout prevention valve as claimed any one in claims 1 to 3, it is characterized in that, described filling ball includes the first half filling balls and the second half filling balls, the buckling surface of described the first half filling balls connects with the buckling surface of described the second half filling balls, the buckling surface of described the first half filling balls is provided with at least one groove and at least one is protruding, the buckling surface of described the second half filling balls is provided with the groove that the projection with the projection of the fit depressions of the buckling surface of described the first half filling balls with the buckling surface of described the first half filling balls matches, described the first half filling balls and linking together that described the second half filling balls fasten.
7. the wellhead polish rod sealing device with blowout prevention valve as claimed any one in claims 1 to 3, it is characterised in that the inwall of described filling ball is provided with multiple annular groove, and multiple described annular grooves are arranged along the axially spaced-apart of described polished rod.
8. the wellhead polish rod sealing device with blowout prevention valve as claimed any one in claims 1 to 3, it is characterized in that, the described wellhead polish rod sealing device with blowout prevention valve also includes ball joint and lower contact, described ball joint is connected to the bottom of described main body, and the spherical inner groovy rotatable engagement that the spherical termination of described ball joint is offered with the upper end of described lower contact is connected.
9. the wellhead polish rod sealing device with blowout prevention valve as claimed any one in claims 1 to 3, it is characterised in that described blowout prevention section includes:
Blowout prevention valve main body, the upper end of described blowout prevention valve main body has Baltimore groove, and described blowout prevention valve main body is located at the top of described pressure cap；
Flow guide sleeve, described flow guide sleeve is the tubular structure that surrounding is evenly arranged pod apertures, and the outer wall of described flow guide sleeve is formed with the inwall epimere of described blowout prevention valve main body and threadeds；
Blowout prevention valve upper cover, the center of described blowout prevention valve upper cover has through hole, the centre bore of the epimere of described blowout prevention valve upper cover is converging transition from top to bottom, the centre bore of the hypomere of described blowout prevention valve upper cover is isometrical section, the epimere of described blowout prevention valve main body connects with the hypomere of described blowout prevention valve upper cover, and described blowout prevention valve main body extends to the inside of centre bore of hypomere of described blowout prevention valve upper cover and is configured to hold the chamber of ball sealer with described blowout prevention valve upper cover, described ball sealer matches with the Baltimore groove of the upper end of described blowout prevention valve main body, described ball sealer under fluid pressure effect can on move and shut the centre bore of epimere of described blowout prevention valve upper cover.
10. the wellhead polish rod sealing device with blowout prevention valve as claimed in claim 9, it is characterised in that described ball sealer is the ball sealer of politef.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610118425.1A CN105781468A (en) | 2016-03-02 | 2016-03-02 | Wellhead polish rod sealing device with blowout preventing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610118425.1A CN105781468A (en) | 2016-03-02 | 2016-03-02 | Wellhead polish rod sealing device with blowout preventing valve |
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| Publication Number | Publication Date |
|---|---|
| CN105781468A true CN105781468A (en) | 2016-07-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610118425.1A Pending CN105781468A (en) | 2016-03-02 | 2016-03-02 | Wellhead polish rod sealing device with blowout preventing valve |
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| CN (1) | CN105781468A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106194096A (en) * | 2016-08-04 | 2016-12-07 | 中国石油大学(华东) | A kind of offshore platform has the compound wellhead assembly of bar oil recovery |
| CN109869111A (en) * | 2019-03-14 | 2019-06-11 | 青岛理工大学 | Following deflection-regulation polished rod seal and liquid drive blowout prevention integrated apparatus |
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| CN204371191U (en) * | 2014-12-02 | 2015-06-03 | 中国石油天然气股份有限公司 | A kind of polished rod sealer |
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| CA2349988A1 (en) * | 2000-06-09 | 2001-10-10 | Oil Lift Technology Inc | Polish rod locking clamp |
| CN2614262Y (en) * | 2003-04-16 | 2004-05-05 | 赵剑明 | Multifunctional well mouth polished rod sealing equipment |
| CN200952375Y (en) * | 2006-08-01 | 2007-09-26 | 寿光市坤隆石油机械有限公司 | Centering polished rod sealing device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106194096A (en) * | 2016-08-04 | 2016-12-07 | 中国石油大学(华东) | A kind of offshore platform has the compound wellhead assembly of bar oil recovery |
| CN109869111A (en) * | 2019-03-14 | 2019-06-11 | 青岛理工大学 | Following deflection-regulation polished rod seal and liquid drive blowout prevention integrated apparatus |
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Application publication date: 20160720 |