CN117605437A - Balanced lifting type wellhead device for pressurized operation and method thereof - Google Patents
Balanced lifting type wellhead device for pressurized operation and method thereof Download PDFInfo
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- CN117605437A CN117605437A CN202410090307.9A CN202410090307A CN117605437A CN 117605437 A CN117605437 A CN 117605437A CN 202410090307 A CN202410090307 A CN 202410090307A CN 117605437 A CN117605437 A CN 117605437A
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- 238000000034 method Methods 0.000 title claims abstract description 13
- 230000001360 synchronised effect Effects 0.000 claims abstract description 10
- 238000009434 installation Methods 0.000 claims description 18
- 238000007789 sealing Methods 0.000 claims description 7
- 238000006073 displacement reaction Methods 0.000 claims description 6
- 238000010008 shearing Methods 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000007373 indentation Methods 0.000 abstract description 4
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 238000001125 extrusion Methods 0.000 description 9
- 238000005553 drilling Methods 0.000 description 6
- 238000010276 construction Methods 0.000 description 5
- 238000004891 communication Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/10—Slips; Spiders ; Catching devices
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (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)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a balanced lifting type wellhead device with pressure operation and a method thereof, and relates to the field of wellhead devices with pressure operation. According to the invention, the synchronous retainer is arranged, when the pushing rod moves towards the circle center far away from the slip outer sleeve under the action of the air cylinder, the inclined connecting rod is pulled, the shifting frame moves downwards along with the pulling of the inclined connecting rod under the limit of the arc-shaped interlink, and the slip mounting seat is buckled into the communicating groove by the pushing guide of the guide connecting chute, so that the stress of the drill rod is uniform when the clamping jaw plate clamps the drill rod, the stability of the drill rod is improved, meanwhile, the damage of the drill rod caused by indentation due to uneven stress in the clamping process of the drill rod is prevented, and the service life of the drill rod is prolonged.
Description
Technical Field
The invention relates to the field of pressurized operation wellhead devices, in particular to a balanced lifting pressurized operation wellhead device and a method thereof.
Background
The oil-water well maintenance operation generally adopts three operation modes of open-flow, well control and pressurized operation, and pressurized operation mainly refers to an efficient operation mode of lifting and lowering a pipe column under the condition of pressurized operation by using a pressurized operation blowout preventer to control the pressure in a well under the condition that the well control and the open-flow are not carried out in the well repairing operation process of a well site.
After lifting and lowering a drill string, the drill string is clamped through slips, the slip moving speed around the drill string is different when the drill string is clamped, so that part of slips are contacted with the drill string, one side of the drill string is subjected to clamping force, the drill string is damaged to a certain extent due to uneven stress after long-time use, the slips are easy to wear and need to be replaced frequently after the drill rod is clamped repeatedly, the operation is complicated, and a large amount of time is wasted when the slips are detached and installed, so that the construction efficiency is affected.
Disclosure of Invention
The invention aims at: in order to solve the problems that the slips are inconvenient to replace quickly and the slips are easy to cause abrasion of a drill string when clamping the drill string, the balanced lifting type wellhead device for operation under pressure and the method thereof are provided.
In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides a balanced over-and-under type operation wellhead assembly under pressure, includes three ram blowout preventers, closed hydraulic clamp is installed at the top of three ram blowout preventers, two ram blowout preventers are installed on the top of closed hydraulic clamp, the top of two ram blowout preventers is connected with the cross valve, annular blowout preventer is installed on the top of cross valve, the top of annular blowout preventer is provided with rotatory oil feed connector, rotatory oil feed connector's top is connected with slips inner joint cover, slips inner joint cover's outer wall is fixed with slips outer joint cover, the cylinder is installed to slips outer joint cover's outer wall, slips inner joint cover's outer wall is fixed with the side link piece, the inboard of side link piece is connected with the pendulum position piece through the pivot rotation, the bottom of pendulum position piece is fixed with the slips mount pad, the output of cylinder is provided with the synchronous screens ware that links to each other with the slips mount pad, the inside of slips mount pad is provided with the slip connector, the slips mount pad is connected with the slip card tooth plate through tearing open the connector, the bottom of mount pad is provided with the soon card piece that links to each other with the connector and tears open.
As still further aspects of the invention: the synchronous retainer is characterized by comprising a pushing rod connected to the output end of the air cylinder, one end of the pushing rod extends to the inner side of the slip outer connecting sleeve, a U-shaped frame is fixed to the top of the locating block, a communicating groove located below the side connecting block is formed in the outer wall of the slip inner connecting sleeve, guide connecting sliding grooves are formed in two sides of the U-shaped frame, an inclined connecting rod is rotatably connected to one end of the pushing rod through a rotating shaft, a shifting frame is rotatably connected to the top of the inclined connecting rod through the rotating shaft, arc-shaped interlinking rings are fixed to two sides of the shifting frame, a shifting pin located inside the guide connecting sliding grooves is fixed to the inner side of the shifting frame, a locking hole located below the communicating pin is formed in the bottom of the communicating groove, side locating blocks are fixed to two sides of the slip mounting seat, and torsion springs connected with the outer sides of the rotating shaft in a clamping mode and connected with the side locating blocks.
As still further aspects of the invention: the number of the shifting frames is four, the four shifting frames are distributed at equal intervals along the circle center of the slip inner joint sleeve, the four shifting frames are connected through an arc interlink, and the diameter of the inner wall of the arc interlink is equal to that of the outer wall of the slip inner joint sleeve.
As still further aspects of the invention: the utility model discloses a slip installation seat, including the slip installation seat, the slip installation seat is kept away from the slip dental lamina, the T type slot has been seted up to the inside of slip installation seat, the magnetism is inhaled the piece to the inner wall of T type slot, the slip dental lamina is close to one side of slip installation seat and is fixed with the T type picture peg of grafting in T type slot inside, the inside of connecting the piece is connected with the axle soon through the bearing rotation, be fixed with the cam on the axle soon, spacing draw-in groove has been seted up to one side that the slip dental lamina was kept away from to the T type picture peg, the inside spacing bayonet lock that runs through to spacing bayonet lock inside that is provided with of connecting the piece surely, the extrusion groove has been seted up in the outside of cam, the one end that the slip installation seat was kept away from to the spacing bayonet lock is fixed with the T type guide pin of sliding connection in extrusion inslot.
As still further aspects of the invention: the diameter size of the limiting bayonet lock is equal with that of the limiting slot, and the magnetic block extends into the slip installation seat from the bottom of the slip installation seat.
As still further aspects of the invention: and through holes matched with the limiting bayonet are formed in one side of the fixed connecting block, which is close to the slip mounting seat, and one side of the slip mounting seat, which is far away from the slip tooth plate.
As still further aspects of the invention: the clamping piece is revolved including being fixed in the screens post that links the axle bottom soon, the bottom of slips mount pad is provided with the T type spacing groove that is located the location and links the piece below, peg graft in the bottom of screens post has the rectangle guide block, the bottom of rectangle guide block is fixed with the inboard screens board that is located T type spacing groove, the bottom of screens board is fixed with the handle, the top of rectangle guide block is fixed with the spacing disc that is located the screens post inboard, the top of spacing disc is provided with the reset spring that links to each other with screens post inner wall.
As still further aspects of the invention: the cam, the rotary connecting shaft and the clamping column are coaxial in circle center, and the thickness of the T-shaped limiting groove is equal to that of the clamping rotating plate.
As still further aspects of the invention: the slip outer sleeve is of a hollow bottomless cylindrical structure, and the length of the slip outer sleeve in the vertical direction is smaller than that of the slip inner sleeve in the vertical direction.
The invention also discloses a balanced lifting type pressurized operation method, which adopts the balanced lifting type pressurized operation wellhead device and comprises the following steps:
s1: firstly, assembling the device, then installing the assembled device on a wellhead, and inserting a drill string into the wellhead from the upper part of the slip inner joint sleeve along the central axis of the slip inner joint sleeve;
s2: realize that the area is pressed back-off, area is pressed to dismantle downhole tool, drag for spear pipe etc. through the cooperation of two ram blowout preventers, closed hydraulic tong, guarantee the safety simultaneously and close the well, realize dynamic seal through annular preventer simultaneously, three-layer ram in through three ram blowout preventers: the semi-sealing flashboard is used for closing the well when a pipe column exists in the well, the fully-sealing flashboard is used for closing the well when the pipe column does not exist in the well, and the shearing flashboard is used for shearing the pipe column and closing the well when an emergency state occurs when the pipe column exists in the well;
s3: when the drill string is clamped, the air cylinder is started, the slip mounting seat swings towards the circle center of the slip inner joint sleeve under the operation of the synchronous retainer, so that the periphery of the drill string in the slip inner joint sleeve is synchronously clamped by the plurality of slip tooth plates, and meanwhile, the drill string in the slip inner joint sleeve loses the clamping limit of the slip tooth plates through the stretching of the air cylinder;
s4: after a period of use, the snap plate is quickly replaced by the cooperation of the rotation limiting clamp and the disconnecting device.
Compared with the prior art, the invention has the beneficial effects that:
1. through setting up synchronous screens ware, can pull the oblique connecting rod when pushing away from the centre of a circle of slips outer jacket and remove under the effect of cylinder, shift the frame and just can move down along with the pulling of oblique connecting rod under the spacing of arc interlink this moment, the shifting pin makes the slips mount pad detain in the intercommunication spread groove through the pressure direction to leading the even spout for the stuck tooth board carries out the complete laminating with the drill string outer wall, so make the stuck tooth board carry out the clamp to the drilling rod when being tight, the drilling rod atress is even, the stability of drilling string is improved, the drilling rod has also been prevented simultaneously to appear the indentation because of the atress is uneven and has led to the fact the damage of drilling rod in the in-process that receives the centre gripping, the life of drilling rod has been increased;
2. through setting up the disconnect, limit the card piece soon, slip tooth on one side of the tile tooth board will receive wearing and tearing after the tile tooth board uses many times, make the spin-on axle rotate through operating limit the card piece soon at this moment, make the cam pull T type guide link pin through the extrusion groove through rotating of spin-on axle, so alright make spacing bayonet lock separate with spacing draw-in groove, at this moment, staff can draw the slip mount pad with T type picture peg out, can insert the tile tooth board with T type picture peg in T type slot in the same way, at this moment, can be through the absorption of magnetic attraction piece to T type picture peg to tile tooth board pre-fixation, afterwards make spacing bayonet lock carry on spacing to T type picture peg through the reverse rotation of spin-on axle, in order to realize the quick installation dismantlement to tile tooth board, construction efficiency has been improved;
3. through setting up limit and revolve the fastener, pull the handle earlier when rotating the rotatory axle for screens rotating plate and T type spacing groove separation, rotate the screens rotating plate afterwards, make screens rotating plate rotate ninety degrees relative T type spacing groove, with this, make rotatory axle rotate ninety degrees under the effect of rectangle guide block, later loosen the handle, screens rotating plate just can recover under reset spring's effect, with this makes screens rotating plate detain T type spacing inslot and carry out spacingly to rotatory axle, with this comes to carry out spacingly to rotatory axle, has increased the stability of clamping shoe to the drill string centre gripping.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic view of the slip outer sleeve of the present invention;
FIG. 3 is a schematic view of the internal structure of the slip outer sleeve of the present invention;
FIG. 4 is a schematic illustration of the connection between multiple dental tiles of the present invention;
FIG. 5 is a schematic illustration of the connection of the side segments to the slip bowl of the present invention;
FIG. 6 is a schematic view of the internal structure of the fixed connection block of the present invention;
FIG. 7 is a schematic illustration of the construction of a slip bowl according to the present invention;
FIG. 8 is a schematic diagram illustrating the connection of the rotary shaft and the limiting bayonet according to the present invention;
fig. 9 is a schematic view of the inner structure of the clamping post according to the present invention.
In the figure: 1. three ram blowout preventers; 2. closed hydraulic pliers; 3. two ram blowout preventers; 4. a four-way valve; 5. an annular blowout preventer; 6. rotating the oil supply connector; 7. slip outer sleeve; 801. slip inner joint sleeve; 802. a pushing rod; 803. a cylinder; 804. arc interlink; 805. a limit disc; 806. a shift rack; 807. a side connecting block; 808. a positioning block; 809. a return spring; 810. a U-shaped frame; 811. a communicating groove is communicated; 812. a capture hole; 813. a pin is inserted; 814. a T-shaped guide pin; 815. a fixed connection block; 816. a slip mounting seat; 817. a stuck tooth plate; 818. a side position plug block; 819. an inclined connecting rod; 820. a guide connecting chute; 821. a torsion spring; 822. a rotary connecting shaft; 823. a cam; 824. a clamping column; 825. a T-shaped limit groove; 826. a limit clamping groove; 827. a limit bayonet lock; 828. t-shaped plugboard; 829. a magnetic suction block; 830. a T-shaped slot; 831. a clamping rotating plate; 832. a grip; 833. a rectangular guide block; 834. a position extruding groove; 835. and a shifting pin.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "configured" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art. Hereinafter, an embodiment of the present invention will be described in accordance with its entire structure.
Referring to fig. 1-9, in an embodiment of the present invention, a balanced lifting wellhead device for pressurized operation includes a three-ram blowout preventer 1, a closed hydraulic clamp 2 is installed at the top of the three-ram blowout preventer 1, two-ram blowout preventers 3 are installed at the top of the closed hydraulic clamp 2, a four-way valve 4 is connected to the top of the two-ram blowout preventers 3, an annular blowout preventer 5 is installed at the top of the four-way valve 4, a rotary oil supply connector 6 is provided at the top of the annular blowout preventer 5, a slip inner connection sleeve 801 is connected to the top of the rotary oil supply connector 6, a slip outer connection sleeve 7 is fixed to the outer wall of the slip inner connection sleeve 801, a cylinder 803 is installed on the outer wall of the slip outer connection sleeve 7, a side connection block 807 is fixed to the outer wall of the slip inner connection sleeve 801, a swing block 808 is connected to the inner side of the side connection block 807 through a rotating shaft, a synchronous retainer connected to the swing block 808 is fixed to the bottom of the swing block 808, a retainer connected to the output end of the cylinder 803 is provided with the slip retainer 816, a rotary connector is provided inside the slip retainer 816, the slip retainer 816 is connected to the bottom of the slip retainer 816, and the slip retainer 816 is connected to a rotary connector.
In this embodiment: the device is assembled firstly, then the assembled device is installed at a wellhead, a drill string is inserted into the wellhead along the central axis of the slip inner joint 801 from the upper part of the slip inner joint 801, the under-pressure back-off, the under-pressure disassembly of a downhole tool, the fishing spear back-off and the like are realized through the cooperation of the two ram blowout preventers 3 and the closed hydraulic clamp 2, the safe well closing is ensured, the dynamic sealing is realized through the annular blowout preventers 5, and the three ram in the three ram blowout preventers 1: the semi-seal flashboard is used for closing a well when a pipe column exists in the well, the fully-seal flashboard is used for closing the well when the pipe column does not exist in the well, the shear flashboard is used for cutting the pipe column and closing the well when an emergency state occurs when the pipe column exists in the well, when the drill column is clamped, the air cylinder 803 is started, the slip mounting seat 816 swings towards the circle center of the slip inner joint sleeve 801 under the operation of the synchronous retainer through the contraction of the air cylinder 803, so that the periphery of the drill column in the slip inner joint sleeve 801 is synchronously clamped by the plurality of slip tooth plates 817, meanwhile, the drill column in the slip inner joint sleeve 801 loses the clamping limit of the slip tooth plates 817 through the expansion of the air cylinder 803, and after a period of use, the slip tooth plate 817 is quickly replaced through the cooperation of the rotation limiting clamping piece and the disconnecting piece.
Referring to fig. 1, 3, 4 and 5, the synchronous retainer includes a push rod 802 connected to an output end of a cylinder 803, one end of the push rod 802 extends to an inner side of a slip outer sleeve 7, a U-shaped frame 810 is fixed at a top of a positioning block 808, a through slot 811 located below a side connecting block 807 is formed in an outer wall of the slip inner sleeve 801, a guide connecting chute 820 is formed at two sides of the U-shaped frame 810, one end of the push rod 802 is rotatably connected with an inclined connecting rod 819 through a rotating shaft, the top of the inclined connecting rod 819 is rotatably connected with a shifting frame 806 through the rotating shaft, two sides of the shifting frame 806 are fixed with arc-shaped connecting rings 804, a shifting pin 835 located inside the guide connecting chute 820 is fixed at an inner side of the shifting frame 806, a locking hole 812 located below the locking slot 811 is formed in a bottom of the locking slot 811, two sides of the slip mounting seat 816 are fixed with side positioning blocks 818, and the rotating shaft 808 is connected with a torsion spring 821 connected with the outer side positioning block 807.
In this embodiment: when the pushing rod 802 moves towards the center away from the slip outer sleeve 7 under the action of the air cylinder 803, the inclined connecting rod 819 is pulled, at this moment, the shifting frame 806 moves downwards along with the pulling of the inclined connecting rod 819 under the limit of the arc-shaped interlink 804, at this moment, the shifting pin 835 swings the slip mounting seat 816 towards the center of the slip inner sleeve 801 through the extrusion of the guide sliding groove 820, so that the slip mounting seat 816 is buckled into the communication groove 811, at this moment, the central axes of the inserting pin 813, the side inserting block 818 and the locking hole 812 are coaxial, at this moment, the shifting frame 806 moves downwards continuously, so that the inserting pin 813 can penetrate through the side inserting block 818 and be inserted into the locking hole 812, thereby limiting the slip mounting seat 816, enabling the clamping plate 817 to be completely attached to the outer wall of a drill rod, so that the stress of the drill rod is uniform when the clamping the drill rod is carried out by the clamping plate 817, the stability of the drill rod is improved, meanwhile, damage caused by indentation of the drill rod in the process of being stressed is prevented, and the service life of the drill rod is prolonged.
Referring to fig. 3 and 4, the number of the displacement frames 806 is four, and the four displacement frames 806 are equidistantly distributed along the center of the slip inner joint 801, the four displacement frames 806 are connected by an arc-shaped interlink 804, and the diameter of the inner wall of the arc-shaped interlink 804 is equal to that of the outer wall of the slip inner joint 801.
In this embodiment: by providing this structure, when one of the shift racks 806 moves down, the four shift racks 806 move down synchronously, thereby causing the slip plate 817 around the drill rod to swing synchronously.
Referring to fig. 5, 6 and 7, the disconnecting device comprises a fixed connection block 815 fixed on one side of the slip mounting seat 816 far away from the tile plate 817, a T-shaped slot 830 is provided in the slip mounting seat 816, a magnetic attraction block 829 is mounted on the inner wall of the T-shaped slot 830, a T-shaped plugboard 828 inserted in the T-shaped slot 830 is fixed on one side of the tile plate 817 near the slip mounting seat 816, a rotary connection shaft 822 is rotatably connected in the fixed connection block 815 through a bearing, a cam 823 is fixed on the rotary connection shaft 822, a limit clamping groove 826 is provided on one side of the T-shaped plugboard 828 far away from the tile plate 817, a limit clamping pin 827 penetrating into the limit clamping groove 826 is provided in the fixed connection block 815, a position extrusion groove 834 is provided on the outer side of the cam 823, and a T-shaped guide connection pin 814 slidably connected in the position extrusion groove 834 is fixed on one end of the limit clamping pin 827 far away from the slip mounting seat 816.
In this embodiment: after the tile plate 817 is used for many times, the slip teeth on one side of the tile plate 817 are worn, at this time, the rotation limiting clamping piece is operated to enable the rotation connecting shaft 822 to rotate, the cam 823 pulls the T-shaped guide pin 814 through the extrusion groove 834, so that the limiting clamping pin 827 is separated from the limiting clamping groove 826, at this time, a worker can draw the T-shaped inserting plate 828 out of the slip mounting seat 816, the tile plate 817 with the T-shaped inserting plate 828 can be inserted into the T-shaped inserting groove 830, at this time, the tile plate 817 can be pre-fixed by the adsorption of the magnetic attraction block 829 to the T-shaped inserting plate 828, and then the limiting clamping pin 827 is enabled to limit the T-shaped inserting plate 828 by the reverse rotation of the rotation connecting shaft 822, so that the quick mounting and dismounting of the tile plate 817 are realized, and the construction efficiency is improved.
Referring to fig. 6, the diameters of the limiting pin 827 and the limiting slot 826 are equal, and the magnetic block 829 extends from the bottom of the slip mounting seat 816 into the slip mounting seat 816.
In this embodiment: by providing this structure, the T-shaped insert plate 828 limits the left and right movement of the slip plate 817 when fully inserted into the T-shaped insert slot 830, and limits the up and down movement of the slip plate 817 when the limit bayonet 827 is inserted into the limit bayonet 826, thereby increasing the stability of the connection of the slip plate 817 with the slip mount 816.
Referring to fig. 6, the side of the fixed connection block 815 near the slip mounting seat 816 and the side of the slip mounting seat 816 far from the slip tooth plate 817 are provided with through holes matched with the limit clamping pins 827.
In this embodiment: by providing this structure, a movable space is provided for the movement of the limiting bayonet 827, and the limiting bayonet 827 is fully retracted into the fixed connecting block 815 when the cam 823 rotates ninety degrees relative to the fixed connecting block 815, so that the limiting bayonet 827 is prevented from obstructing the movement of the T-shaped insert plate 828.
Referring to fig. 7, 8 and 9, the rotation limiting clamp comprises a clamping column 824 fixed at the bottom of a rotation connecting shaft 822, a T-shaped limiting groove 825 positioned below a positioning block 815 is arranged at the bottom of a slip mounting seat 816, a rectangular guide block 833 is inserted at the bottom of the clamping column 824, a clamping rotating plate 831 positioned at the inner side of the T-shaped limiting groove 825 is fixed at the bottom of the rectangular guide block 833, a grip 832 is fixed at the bottom of the clamping rotating plate 831, a limiting disc 805 positioned at the inner side of the clamping column 824 is fixed at the top of the rectangular guide block 833, and a reset spring 809 connected with the inner wall of the clamping column 824 is arranged at the top of the limiting disc 805.
In this embodiment: when the rotary connecting shaft 822 rotates, the handle 832 is pulled firstly, so that the clamping rotating plate 831 is separated from the T-shaped limiting groove 825, then the clamping rotating plate 831 is rotated for ninety degrees relative to the T-shaped limiting groove 825, so that the rotary connecting shaft 822 rotates for ninety degrees under the action of the rectangular guide block 833, then the handle 832 is released, the clamping rotating plate 831 is restored under the action of the restoring spring 809, so that the clamping rotating plate 831 is buckled into the T-shaped limiting groove 825 to limit the rotary connecting shaft 822, the rotary connecting shaft 822 is limited, and the stability of clamping of the clamping tooth plate 817 on a drill string is improved.
Referring to fig. 8 and 9, the centers of the cam 823, the rotary shaft 822 and the locking post 824 are coaxial, and the thickness of the T-shaped limit slot 825 is equal to that of the locking plate 831.
In this embodiment: by setting this structure, the stability of connection between the self-locking rotating plate 831 and the T-shaped limit groove 825 is achieved, and the rotation angle of the rotating shaft 822 and the locking column 824 is equal.
Referring to fig. 3, the slip outer sleeve 7 has a hollow bottomless cylindrical structure, and the length of the slip outer sleeve 7 in the vertical direction is smaller than the length of the slip inner sleeve 801 in the vertical direction.
In this embodiment: by providing this structure, the slip outer sleeve 7 is prevented from shielding the slip mount 816 in an inclined state, thereby increasing the smoothness of removal and installation of the slip retainer 817.
The following provides a balanced lifting type pressurized operation wellhead device, which specifically comprises the following steps:
s1: firstly, assembling the device, then installing the assembled device on a wellhead, and inserting a drill string into the wellhead from the upper part of the slip inner joint 801 along the central axis of the slip inner joint 801;
s2: realize pressing back-off, taking down the downhole tool under pressure, drag for spear pipe etc. through the cooperation of two ram blowout preventers 3, closed hydraulic tong 2, guarantee the safety simultaneously and close the well, realize dynamic seal through annular preventer 5 simultaneously, three-layer ram in through three ram blowout preventers 1: the semi-sealing flashboard is used for closing the well when a pipe column exists in the well, the fully-sealing flashboard is used for closing the well when the pipe column does not exist in the well, and the shearing flashboard is used for shearing the pipe column and closing the well when an emergency state occurs when the pipe column exists in the well;
s3: when the pushing rod 802 moves away from the center of the slip outer sleeve 7 under the action of the air cylinder 803, the inclined connecting rod 819 is pulled, at the moment, the shifting frame 806 moves downwards along with the pulling of the inclined connecting rod 819 under the limit of the arc-shaped interlink 804, at the moment, the shifting pin 835 swings the slip mounting seat 816 towards the center of the slip inner sleeve 801 through the extrusion of the guide sliding groove 820, so that the slip mounting seat 816 is buckled into the communication groove 811, at the moment, the central axes of the inserting pin 813, the side inserting block 818 and the locking hole 812 are coaxial, at the moment, the shifting frame 806 moves downwards continuously, so that the inserting pin 813 can penetrate through the side inserting block 818 and be inserted into the locking hole 812, thereby limiting the slip mounting seat 816, enabling the clamping plate 817 to be completely attached to the outer wall of a drill rod, enabling the stress of the drill rod to be uniform when the clamping of the drill rod by the clamping plate 817, improving the stability of the drill rod, and simultaneously preventing damage caused by indentation in the process of being stressed unevenly, and prolonging the service life of the drill rod;
s4: after the slip plate 817 is used for many times, slip teeth on one side of the slip plate 817 are worn, when the slip plate 817 is replaced, the grip 832 is pulled firstly to separate the clamping rotating plate 831 from the T-shaped limiting groove 825, then the clamping rotating plate 831 is rotated to enable the clamping rotating plate 831 to rotate ninety degrees relative to the T-shaped limiting groove 825, so that the rotating shaft 822 rotates ninety degrees under the action of the rectangular guide block 833, then the grip 832 is released, the clamping rotating plate 831 is restored under the action of the reset spring 809, the rotating shaft 822 rotates in the process, the cam 823 pulls the T-shaped guide pin 814 through the extrusion groove 834 by the rotation of the rotating shaft 822, and the limiting clamping pin 827 is separated from the limiting clamping groove 826;
s5: at this time, a worker can withdraw the T-shaped insert plate 828 from the slip mounting seat 816, and can insert the tile plate 817 with the T-shaped insert plate 828 into the T-shaped insert slot 830, at this time, the tile plate 817 can be pre-fixed by the adsorption of the magnetic attraction block 829 to the T-shaped insert plate 828, and then the limiting bayonet 827 is used for limiting the T-shaped insert plate 828 by the reverse rotation of the rotary connecting shaft 822, so that the tile plate 817 can be quickly assembled and disassembled, and the construction efficiency is improved.
The foregoing description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical solution of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (9)
1. The utility model provides a balanced lift type pressurized operation wellhead assembly, includes three ram blowout preventer (1), its characterized in that, closed hydraulic tong (2) are installed at the top of three ram blowout preventer (1), two ram blowout preventers (3) are installed on the top of closed hydraulic tong (2), the top of two ram blowout preventers (3) is connected with cross valve (4), annular blowout preventer (5) are installed on the top of cross valve (4), the top of annular blowout preventer (5) is provided with rotatory oil feed connector (6), the top of rotatory oil feed connector (6) is connected with slips inner connection cover (801), the outer wall of slips inner connection cover (801) is fixed with slips outer connection cover (7), cylinder (803) are installed to the outer wall of slips outer connection cover (7), the outer wall of slips inner connection cover (801) is fixed with a plurality of side connection pieces (807), a plurality of side connection pieces (807) are equidistantly distributed along the centre of a circle of slips inner connection cover (801), the inboard of side connection piece (807) is provided with pendulum block 808 through pivot rotation, the bottom of pendulum block 808 is installed with the interior seat of slips (816), the seat of slips (816) is installed to install in the interior seat of slips (816) and the seat of slips (816), the slip installation seat (816) is connected with a slip tooth plate (817) through a disconnecting device, and the bottom of the slip installation seat (816) is provided with a rotation limiting clamping piece connected with the disconnecting device;
synchronous screens ware is including being connected in pushing away position pole (802) of cylinder (803) output, and the one end of pushing away position pole (802) extends to the inboard of slips outer cover (7), the top of shifting block (808) is fixed with U type frame (810), link groove (811) that are located side link groove (807) below have been seted up to the outer wall of slips inner cover (801), lead link groove (820) have been seted up to the both sides of U type frame (810), the one end of pushing away position pole (802) is connected with oblique connecting rod (819) through the pivot rotation, the top of oblique connecting rod (819) is connected with shifting frame (806) through the pivot rotation, the both sides of shifting frame (806) are fixed with arc link (804), the inboard of shifting frame (806) is fixed with and is located lead link groove (820) inside and dial down pin (835), be fixed with on arc link (804) and be located link groove (811) inboard plug pin (813), the bottom of link groove (811) has seted up plug pin (813) and is located plug hole (812) of inserting down of block (808), the outside of setting up swing block (808) and connecting block (808) are connected with torsion.
2. The balanced lifting type pressurized operation wellhead device according to claim 1, wherein the number of the displacement frames (806) is four, the four displacement frames (806) are distributed at equal intervals along the circle center of the slip inner joint sleeve (801), the four displacement frames (806) are connected through an arc-shaped interlink (804), and the diameter of the inner wall of the arc-shaped interlink (804) is equal to that of the outer wall of the slip inner joint sleeve (801).
3. The balanced lifting wellhead assembly with pressure operation according to claim 1, wherein the disconnecting device comprises a fixed connection block (815) fixed on one side of a slip installation seat (816) away from a slip tooth plate (817), a T-shaped slot (826) is formed in the slip installation seat (816), a magnetic attraction block (829) is mounted on the inner wall of the T-shaped slot (830), a T-shaped plugboard (828) inserted into the T-shaped slot (830) is fixed on one side of the slip installation seat (817) close to the slip installation seat (816), a rotary connection shaft (822) is connected in a rotating manner through a bearing, a cam (823) is fixed on the rotary connection shaft (822), a limit clamping groove (826) is formed in one side of the T-shaped plugboard (828) away from the slip tooth plate (817), a limit clamping pin (827) penetrating into the limit clamping groove (826) is formed in the interior, a squeezing groove (834) is formed in the outer side of the cam (817), and one end of the fixed connection block (834) away from the slip installation seat (834).
4. A balanced lift pressurized working wellhead according to claim 3, characterised in that the diameter of the limit bayonet (827) is equal to that of the limit slot (826), and the magnet (829) extends from the bottom of the slip mount (816) into the slip mount (816).
5. The balanced lift pressurized work wellhead assembly of claim 4 wherein the side of the stator block (815) adjacent the slip mount (816) and the side of the slip mount (816) remote from the slip retainer plate (817) are each provided with a through hole matching the stop pin (827).
6. The balanced lifting wellhead assembly with pressure operation according to claim 4, wherein the rotation limiting clamping piece comprises a clamping column (824) fixed at the bottom of the rotation connecting shaft (822), a T-shaped limiting groove (825) positioned below the positioning block (815) is formed in the bottom of the slip mounting seat (816), a rectangular guide block (833) is inserted into the bottom end of the clamping column (824), a clamping rotating plate (831) positioned at the inner side of the T-shaped limiting groove (825) is fixed at the bottom of the rectangular guide block (833), a grip (832) is fixed at the bottom of the clamping rotating plate (831), a limiting disc (805) positioned at the inner side of the clamping column (824) is fixed at the top of the rectangular guide block (833), and a reset spring (809) connected with the inner wall of the clamping column (824) is arranged at the top of the limiting disc (805).
7. The balanced lift pressurized operation wellhead assembly of claim 6 wherein the cam (823), swivel (822) and detent post (824) are concentric about a center of a circle, and the T-shaped limit slot (825) has a thickness equal to the thickness of the detent swivel plate (831).
8. The balanced lift type pressurized working wellhead device according to claim 6, wherein the slip outer sleeve (7) has a hollow bottomless cylindrical structure, and the length of the slip outer sleeve (7) in the vertical direction is smaller than the length of the slip inner sleeve (801) in the vertical direction.
9. A balanced lift pressurized working method, characterized in that a balanced lift pressurized working wellhead device according to any of claims 1-9 is used, comprising the following steps:
s1: firstly, assembling the device, then installing the assembled device on a wellhead, and inserting a drill string into the wellhead from the upper part of the slip inner joint sleeve (801) along the central axis of the slip inner joint sleeve (801);
s2: realize pressing back-off, taking down the downhole tool, drag for spear pouring through the cooperation of two ram blowout preventers (3), closed hydraulic tong (2), guarantee the safety simultaneously and close the well, realize dynamic seal through annular preventer (5) simultaneously, three-layer ram in through three ram blowout preventers (1): the semi-sealing flashboard is used for closing the well when a pipe column exists in the well, the fully-sealing flashboard is used for closing the well when the pipe column does not exist in the well, and the shearing flashboard is used for shearing the pipe column and closing the well when an emergency state occurs when the pipe column exists in the well;
s3: when a drill string is clamped, a cylinder (803) is started, the slip installation seat (816) swings towards the center of the slip inner joint sleeve (801) under the operation of the synchronous retainer, so that the periphery of the drill string in the slip inner joint sleeve (801) is synchronously clamped by a plurality of slip tooth plates (817), and meanwhile, the drill string in the slip inner joint sleeve (801) loses the clamping limit of the slip tooth plates (817) through the extension of the cylinder (803);
s4: after a period of use, the slip plate (817) is quickly replaced by the engagement of the spin-limited clip with the disconnect.
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| CN202410090307.9A CN117605437B (en) | 2024-01-23 | 2024-01-23 | Balanced lifting type wellhead device for pressurized operation and method thereof |
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| CN202410090307.9A CN117605437B (en) | 2024-01-23 | 2024-01-23 | Balanced lifting type wellhead device for pressurized operation and method thereof |
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