CN118029936B - 175MPa superhigh pressure gas production wellhead device - Google Patents
175MPa superhigh pressure gas production wellhead device Download PDFInfo
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- CN118029936B CN118029936B CN202410274523.9A CN202410274523A CN118029936B CN 118029936 B CN118029936 B CN 118029936B CN 202410274523 A CN202410274523 A CN 202410274523A CN 118029936 B CN118029936 B CN 118029936B
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 33
- 230000008878 coupling Effects 0.000 claims description 69
- 238000010168 coupling process Methods 0.000 claims description 69
- 238000005859 coupling reaction Methods 0.000 claims description 69
- 230000000903 blocking effect Effects 0.000 claims description 15
- 210000002445 nipple Anatomy 0.000 abstract description 58
- 230000000694 effects Effects 0.000 abstract description 5
- 238000007789 sealing Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 6
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 2
- 235000017491 Bambusa tulda Nutrition 0.000 description 2
- 241001330002 Bambuseae Species 0.000 description 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 239000011425 bamboo Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000011900 installation process Methods 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/08—Casing joints
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
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- Mining & Mineral Resources (AREA)
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- Environmental & Geological Engineering (AREA)
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- Mechanical Engineering (AREA)
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Abstract
The invention discloses a 175MPa ultrahigh pressure gas production wellhead device in the technical field of gas production devices, which comprises a gas production tree, wherein a flange plate is arranged at the bottom of the gas production tree, bolt holes are formed in the flange plate, and a connecting group and a fixing group are arranged below the flange plate; when the gas production tree is installed, the external threads of the casing nipple cannot directly touch the wellhead casing collar through the assistance of the connecting group, so that the effect that the sealing and gas production effects are affected due to the fact that the threads of the external threads are damaged is avoided.
Description
Technical Field
The invention relates to the technical field of gas production devices, in particular to a 175MPa ultrahigh pressure gas production wellhead device.
Background
The gas production wellhead equipment standard globally used in the petroleum and gas industry at present prescribes that the highest pressure can be applied to 140MPa, the foreign drilling stratum is shallow, the product demand for 140MPa and above is very small, and domestic 140MPa wellhead use blocks are mainly distributed in the south-edge blocks of Xinjiang oil fields, the front of Tarim mountain and the northwest blocks of southwest oil and gas fields. In recent years, more and more ultra-deep, ultra-high pressure and high Wen Dengfeng dangerous exploratory wells are deployed in China, the ultra-high pressure and high-pressure deep wells are gradually increased, the closing pressure exceeds 120MPa, even the rated pressure is close to 140MPa, the product with the pressure grade of 140MPa can not completely meet the requirements of the exploration and development of the ultra-deep oil-gas well, well control equipment with higher pressure grade is urgently needed, and well control equipment with the pressure grade of 175MPa is put into use;
When 175MPa well control equipment is installed, the external threads of the casing nipple are required to be buckled on a wellhead casing coupling as in normal well control equipment, so that the connection between a wellhead casing and the casing is completed, the connection between the external threads of the casing nipple and the wellhead casing coupling is manually installed, in the installation process, two or more operators lift the external threads of the casing nipple to place the bottom end of the external threads of the casing nipple on the casing coupling, and then the external threads of the casing nipple are rotated to enable the threads of the casing nipple and the casing coupling to be meshed with each other, so that the connection is completed;
but in actual operation, there are various reasons to influence the connection of the external thread of the casing nipple and the casing collar:
1. Because the flange plate used for being connected with the gas production tree is arranged above the casing nipple external thread, the casing nipple external thread has heavier weight, and a special auxiliary device is not arranged when the casing nipple external thread is connected with the casing coupling, so that when a plurality of people lift the casing nipple external thread to be placed on a wellhead casing coupling, the situation that the casing nipple external thread directly collides with the internal thread of the casing coupling to cause thread damage can be influenced due to inertia or improper operation, the tightness and the connection strength can be influenced, and the situation that the casing nipple external thread and the casing coupling thread cannot be damaged during gas production work can not be caused, so that leakage is avoided;
2. The external threads of the casing nipple and the casing coupling are not convenient to align when the external threads of the casing nipple and the casing coupling are buckled, so that the situation that the threads are crossed and misplaced is easily caused, the external threads of the casing nipple and the casing coupling are extremely difficult to be taken down intact once the situation that the threads are crossed and misplaced is caused, and the external threads of the casing nipple and the casing coupling are difficult to be taken down by pushing by manpower when the threads are crossed and misplaced, so that the external threads of the casing nipple or the casing coupling are always collided by external force or are forcedly taken down by applying larger torsion force, and the applied force is applied to the threads to cause the damage of the threads, so that the external threads of the casing nipple or the casing coupling cannot meet the use requirement in gas production;
3. when the external thread of the casing nipple and the thread of the casing coupling are smoothly meshed, the external thread of the casing nipple is required to be rotated, but the weight of the external thread of the casing nipple is large, so that manual rotation can not be realized due to large friction force generated between the external thread of the casing nipple and the thread when the casing nipple rotates in a small range, and rotation is required to be realized in other modes, for example, a stress application rod is placed on a bolt hole of a flange plate on the external thread of the casing nipple, then a bolt is respectively inserted into the bolt holes at the front and rear positions of two sides of the stress application rod to be different from the stress application rod, then rotate the afterburning pole and drive ring flange and sleeve nipple external screw thread and rotate, when rotatory sleeve nipple external screw thread of this kind of mode, the manual work can intermittent type nature striking and promote the afterburning pole, it is rotatory to drive sleeve nipple external screw thread through the impact to the afterburning pole, lead to two individual bolts that the afterburning pole destroy the screw thread in the bolt hole of ring flange in a moment, influence the leakproofness of being connected between ring flange and the gas production tree, second, the impact force can lead to too big and the too fast of rotation dynamics when buckling more, can destroy the intensity and the life-span of screw thread, can directly influence sealed effect, also extremely form the potential safety hazard easily.
Disclosure of Invention
The invention aims to provide a 175MPa ultrahigh pressure gas production wellhead device so as to solve the problems in the background art.
In order to achieve the above purpose, the present invention provides the following technical solutions: the 175MPa ultrahigh pressure gas production wellhead device comprises a gas production tree, wherein a flange plate is arranged at the bottom of the gas production tree, bolt holes are formed in the flange plate, and a connecting group and a fixing group are arranged below the flange plate;
The connecting group comprises a connecting ring, a first thread cylinder and a second thread cylinder, wherein the first thread cylinder is fixedly connected to the top end of the connecting ring, matched threads are respectively arranged on the outer part of the first thread cylinder and the inner part of the second thread cylinder, a plurality of U-shaped frames are fixedly connected to the outer side wall of the second thread cylinder, a first air cylinder is fixedly connected to the inner wall of each U-shaped frame, a cross rod is fixedly connected to the top end of each first air cylinder, a supporting rod is fixedly connected to the top end of each cross rod in a sliding manner, a second air cylinder is fixedly connected to the inner part of each cross rod, a positioning rod is fixedly connected to the top end of each supporting rod, and a plug rod is fixedly connected to the side wall of each second thread cylinder;
the fixed group is used for installing and detaching the connecting ring on the wellhead casing coupling and positioning the connecting group.
As a further scheme of the invention, the fixed group comprises a supporting ring and guide holes, the supporting ring is positioned under the connecting ring, a chute is formed in the top of the supporting ring, the chute is arc-shaped, the bottom end of the connecting ring is positioned in the chute and is in sliding connection with the chute, a first spring is fixedly connected between the chute and the connecting ring, the guide holes are equidistantly formed on the connecting ring by taking the central point of the connecting ring as the center, rack rods are all in sliding connection with the inside of the guide holes, the rack rods are all meshed with first gears, the first gears are all in rotary connection with the connecting ring, clamping rods are fixedly connected to one sides, close to the circle center position of the connecting ring, of the top ends of the rack rods, of the clamping rods can be clamped at the top of a wellhead casing collar, the parts, close to the lower half parts of the first gears are all meshed with first arc-shaped rack rods, the first arc-shaped rack rods are fixedly connected to the inner side walls of the supporting ring, and when the first arc-shaped rack rods rotate around the points, the first arc-shaped rack rods drive the rack rods to slide along the guide holes through the first gears;
The fixed group still includes dead group of card and one-way restriction group the same with rack bar quantity, one-way restriction group is used for restricting go-between and slip direction, dead group of card and one-way restriction group's cooperation can avoid the second screw thread section of thick bamboo to rotate the time through frictional force drive connection group around well head casing collar outer wall rotation.
As a further scheme of the invention, the clamping rod is L-shaped as a whole and the top end of the clamping rod can be hung on a wellhead casing collar.
As a further scheme of the invention, the top ends of the clamping rods are all connected with clamping blocks in a sliding manner, the clamping rods are rotationally connected with threaded rods, and the threaded rods are in threaded connection with the clamping blocks.
As a further scheme of the invention, the outer ends of the rack bars are bent to one side.
As a further scheme of the invention, the blocking group comprises a second gear, the second gear is rotationally connected to the bottom of one side of the rack bar, which is close to the center point of the connecting ring, the bottom end of the second gear is fixedly connected with a contact wheel, the second gear is meshed with a third gear, the third gear is rotationally connected to the bottom of the rack bar, the fixed bottom end of the third gear is fixedly connected with a blocking rod, and the rotating shaft of the third gear is sleeved with a torsion spring.
As a further scheme of the invention, the unidirectional limiting group comprises a second arc-shaped rack rod and a fourth gear, wherein the second arc-shaped rack rod is fixedly connected to the outer side wall of the supporting ring, the fourth gear is connected with a guide rod in a sliding manner, the guide rod is fixedly connected to the supporting ring, a second spring is arranged between the guide rod and the fourth gear, and the second spring is sleeved outside the guide rod.
As a further scheme of the invention, the connecting ring is fixedly connected with a handrail, and the supporting ring is fixedly connected with a push rod.
Compared with the prior art, the invention has the beneficial effects that:
The external thread of the casing nipple is coaxial with the wellhead casing coupling and is positioned on the same horizontal plane before the casing nipple is meshed with the wellhead casing coupling, so that the situation of cross dislocation can not occur during the meshing, the external thread of the casing nipple can not directly touch the wellhead casing coupling through the assistance of a connecting group, the effect that the sealing and gas production are affected by the damage of the threads of the casing nipple and the wellhead casing coupling is avoided, and in the mode, the power during the buckling of the casing nipple external thread and the wellhead casing coupling is not directly applied to the casing nipple external thread and the wellhead casing coupling, but is directly applied to the first thread cylinder and the second thread cylinder, the problem that the external thread of the casing nipple and the threads on the wellhead casing coupling are damaged is avoided again, and the mode that a stress rod is rotated by being different from a bolt is replaced, and the damage of the threads in a bolt hole can also be avoided.
The invention can also adapt to external threads of casing nipple joints and wellhead casing couplings with different sizes, improves the working capacity in the field, is convenient to disassemble, and greatly reduces the fault tolerance and the potential safety hazard.
Drawings
FIG. 1 is a schematic diagram of a connection between a gas production tree and a flange plate;
FIG. 2 is a schematic illustration of an external thread of a casing nipple and a wellhead casing coupling;
FIG. 3 is a schematic diagram of the overall structure of the present invention;
FIG. 4 is a schematic diagram of the connection relationship between the first screw barrel, the second screw barrel and the plug rod according to the present invention;
FIG. 5 is a schematic view of the positional relationship of the support bar, cross bar and positioning bar of the present invention;
FIG. 6 is a schematic view of the rack bar of the present invention in contact with a clamp bar and wellhead casing collar;
FIG. 7 is a schematic view of the positional relationship between the locking set and the connecting ring and unidirectional limiting set according to the present invention;
FIG. 8 is a schematic diagram of the connection relationship between the first spring and the connecting ring according to the present invention;
FIG. 9 is a schematic diagram of the connection of the support ring to the fourth gear and the second arcuate rack bar of the present invention;
FIG. 10 is a schematic view of the fourth gear in position relationship with the second spring and the guide bar of the present invention;
FIG. 11 is a schematic diagram of a dead set according to the present invention;
FIG. 12 shows a threaded rod according to the present invention the connection relation of the clamping rod is shown schematically.
In the drawings, the list of components represented by the various numbers is as follows:
a. External threads of the casing nipple; b. a wellhead casing collar; 1. a gas production tree; 3. a flange plate; 4. bolt holes; 5. a connecting ring; 6. a first thread cylinder; 7. a second thread cylinder; 8. a U-shaped frame; 9. a first cylinder; 10. a cross bar; 11. a second cylinder; 12. a support rod; 13. a positioning rod; 14. a rod; 15. a support ring; 16. a chute; 17. a first spring; 18. a guide hole; 19. a rack bar; 20. a first gear; 21. a clamping rod; 22. a first arcuate rack bar; 23. a threaded rod; 24. a second gear; 25. a contact wheel; 26. a third gear; 27. a blocking rod; 28. a torsion spring; 29. a second arcuate rack bar; 30. a fourth gear; 31. a guide rod; 33. a second spring; 34. an armrest; 35. a push rod; 36. and (5) clamping blocks.
Detailed Description
Preferred embodiments of the present invention will be described with reference to the accompanying drawings in order to fully understand the present invention. The embodiments of the present invention can be modified into various forms, and the scope of the present invention is not limited to the embodiments described in detail below. The present embodiments are provided to more fully explain the present invention to those skilled in the art to which the present invention pertains. Accordingly, the shapes of elements and the like in the drawings may be exaggerated for further emphasis on the clear description. Like parts are given like reference numerals throughout the various figures. Detailed descriptions of known functions and configurations that are determined to be likely to obscure the gist of the present invention will be omitted.
Referring to fig. 1-12, the present invention provides a technical solution: a175 MPa ultra-high pressure gas production wellhead device comprises a gas production tree 1, wherein a flange plate 3 is arranged at the bottom of the gas production tree 1, bolt holes 4 are formed in the flange plate 3, and a connecting group and a fixing group are arranged below the flange plate 3;
The connecting group comprises a connecting ring 5, a first threaded cylinder 6 and a second threaded cylinder 7, wherein the first threaded cylinder 6 is fixedly connected to the top end of the connecting ring 5, matched threads are respectively arranged on the outer part of the first threaded cylinder 6 and the inner part of the second threaded cylinder 7, a plurality of U-shaped frames 8,U are fixedly connected to the outer side wall of the second threaded cylinder 7, a first air cylinder 9 is fixedly connected to the inner wall of each U-shaped frame 8,U, a cross rod 10 is fixedly connected to the top end of each first air cylinder 9, a supporting rod 12 is fixedly connected to the top end of each cross rod 10 in a sliding manner, a second air cylinder 11 is fixedly connected to the inner part of each cross rod 10, a positioning rod 13 is fixedly connected to the top end of each supporting rod 12, and a plug rod 14 is fixedly connected to the side wall of each second threaded cylinder 7;
The fixed set is used to mount and dismount the connection ring 5 on the wellhead casing collar b and to position the connection set.
As shown in fig. 1-5:
Preparation work before connection:
The well head casing coupling b is positioned underground and the upper end extends out of the ground, the external thread a of the casing nipple and the flange plate 3 are connected, the connecting group is fixed on the well head casing coupling b through the fixing group before the external thread a of the casing nipple and the well head casing coupling b are connected, the state shown in figure 2 is the state after the fixing is finished, the center points of the connecting ring 5, the first thread cylinder 6 and the second thread cylinder 7 are overlapped with the well head casing coupling b, then the extending distance of the second air cylinder 11 is adjusted according to the diameter length of the bolt hole 4 on the flange plate 3, the support rod 12 is pushed to slide along the cross rod 10 when the second air cylinder 11 is extended, the bolt hole 4 is inserted into the positioning rod 13 after the diameter between the two relatively heavy positioning rods 13 can be inserted into the threaded hole 4, then the second air cylinder 11 is controlled to be shortened, the second air cylinder 11 can be closed when the second air cylinder 11 cannot be shortened again, the flange plate 3 and the external thread a are positioned on the same axis with the well head casing coupling b, and the positioning work between the two is finished, the support rod 3 and the top of the casing nipple is supported by the support rod 12 after the flange plate 3 and the well head casing coupling b are concentric, and the bottom of the top of the casing nipple 3 is parallel to the horizontal plane;
then the first cylinder 9 is controlled to be shortened, the U-shaped frame 8 can support the first cylinder 9, the flange 3, the cross rod 10 and the support rod 12 can descend, and the first cylinder 9 is stopped until the bottom of the external thread a of the casing nipple is about to be contacted with the top end of the wellhead casing coupling b, namely, the state shown in fig. 2 and 3;
and (3) connection work:
As shown in fig. 2-5:
the stressing rod is directly inserted into the inserted link 14 and is rotated, the rotating speed is kept constant as much as possible, the second threaded cylinder 7 is driven to rotate on the outer wall of the first threaded cylinder 6 through the inserted link 14 when the stressing rod rotates, at the moment, the threads on the outer wall of the first threaded cylinder 6 are meshed with the threads on the outer wall of the second threaded cylinder 7, and the second threaded cylinder 7 gradually descends along the outer wall of the second threaded cylinder 7 while rotating, at the moment, the second threaded cylinder 7 gradually descends while driving the U-shaped frame 8, the cross rod 10, the supporting rod 12 and the flange 3 to rotate with the casing coupling nipple external thread a, and when the casing nipple external thread a descends for a small distance, the second threaded cylinder 7 gradually meshes with the threads of the wellhead casing b while the casing nipple external thread a descends, and then the stressing rod continues to rotate until the connection of the casing nipple external thread a and the wellhead casing coupling b is completed;
Because the external thread a of the casing nipple and the external thread a of the wellhead casing coupling are coaxial and are positioned on the same horizontal plane before the casing nipple is meshed with the wellhead casing coupling b, the situation of cross dislocation can not occur during the meshing, moreover, the external thread a of the casing nipple can not directly touch the wellhead casing coupling b through the assistance of a connecting group, the effect that the sealing and the gas production are influenced by the damage of the threads of the casing nipple and the wellhead casing coupling b is avoided, in this way, the power during the buckling of the external thread a of the casing nipple and the wellhead casing coupling b is not directly acted on the external thread a of the casing nipple and the wellhead casing coupling b, but directly acted on the first thread cylinder 6 and the second thread cylinder 7, the problem that the threads on the external thread a of the casing nipple and the wellhead casing coupling b are damaged can be avoided again, the mode that a stress rod rotates by being different from a bolt is replaced, and the damage of the threads in the bolt hole 4 can be avoided;
and (3) disassembling:
After the casing nipple external thread a and the wellhead casing coupling b are installed, the second cylinder 11 is controlled to be shortened to the limit degree, at the moment, one end of the supporting rod 12, which is close to the flange 3, is far away from the flange 3 to the limit degree and is positioned on the outer side of the flange 3, then the fixed group is released from fixing the connecting group, and the connecting ring 5 is directly pulled upwards;
Therefore, the mode can also adapt to the external threads a of the casing nipple and the wellhead casing coupling b with different sizes, improves the working capacity in the field, is convenient to disassemble, and reduces the fault tolerance and the potential safety hazard to a great extent.
As a further scheme of the invention, the fixed group comprises a supporting ring 15 and a guide hole 18, the supporting ring 15 is positioned under the connecting ring 5, a chute 16 is formed at the top of the supporting ring 15, the chute 16 is arc-shaped, the bottom end of the connecting ring 5 is positioned in the chute 16 and is in sliding connection with the chute 16, a first spring 17 is fixedly connected between the chute 16 and the connecting ring 5, the guide hole 18 is equidistantly formed on the connecting ring 5 by taking the central point of the connecting ring 5 as the center, rack rods 19 are all in sliding connection with the inside of the guide hole 18, the rack rods 19 are all meshed with a first gear 20, the first gears 20 are all in rotating connection with the connecting ring 5, one side, close to the center of the connecting ring 5, of the top end of the rack rod 19 is fixedly connected with a clamping rod 21, the clamping rod 21 can be clamped at the top of a wellhead casing collar b, the part, close to the lower half part of the first gear 20 is all meshed with a first arc-shaped rack rod 22, the first arc-shaped rack rod 22 is fixedly connected to the inner side wall of the supporting ring 15, and when the first arc-shaped rack rod 22 rotates around the center point, the first arc-shaped rod 22 drives the rack rod 19 to slide along the guide hole 18 through the first gear 20;
The fixed group still includes the dead group of card and one-way restriction group the same with rack bar 19 quantity, and one-way restriction group is used for restricting go-between 5 and slip direction, and the dead group of card can avoid through frictional force drive connection group around wellhead casing coupling b outer wall rotation when the cooperation of one-way restriction group is rotated to second screw thread section of thick bamboo 7.
Examples
As a further aspect of the invention, the clamping rod 21 is generally L-shaped and can be hung on the wellhead casing collar b at its top end.
As shown in fig. 3-4, 6-9 and 11:
the support ring 15 and the connecting ring 5 are sleeved on the wellhead casing coupling b, the top end of the clamping rod 21 is higher than the wellhead casing coupling b, then the limitation of the unidirectional limiting group on the connecting ring 5 needs to be released, the first spring 17 is kept in a stretching state before the unidirectional limiting group is used for releasing the limitation on the connecting ring 5, after the limitation is released, the connecting ring 5 is pulled to rapidly slide in the sliding groove 16 under the elastic reset action of the first spring 17, at the moment, the connecting ring 5 is in a clockwise rotating state, the first arc-shaped rack rod 22 can rotate along the connecting ring 5 and is meshed with the first gear 20 when the connecting ring 5 rotates, the length of the first gear 20 is longer, the first arc-shaped rack rod 22 is positioned above the horizontal plane of the rack rod 19, so that the first gear 20 can be meshed with the first arc-shaped rack rod 22 and the rack rod 19 simultaneously, at the moment, the rack rod 19 is close to the wellhead casing coupling b along the guide hole 18, and the connecting ring 5 and the support ring 15 can be loosened after the clamping rod 21 contacts the wellhead casing coupling b, and the clamping rod 21 can not touch the top end of the wellhead casing coupling b when the clamping rod 21 is in a certain thickness is not contacted with the wellhead casing coupling b, and the top end of the casing coupling b is not contacted with the casing coupling a when the coupling b is arranged;
after the clamping rods 21 are clamped on the wellhead casing coupling b, the plurality of rack rods 19 are uniformly distributed outside the wellhead casing coupling b, the clamping groups fix the connecting ring 5 and the supporting ring 15 outside the wellhead casing coupling b, and then the preparation work and the connection work before connection can be performed.
Examples
As a further scheme of the invention, the top ends of the clamping rods 21 are all connected with clamping blocks 36 in a sliding manner, the clamping rods 21 are rotatably connected with threaded rods 23, and the threaded rods 23 are in threaded connection with the clamping blocks 36.
As shown in fig. 12, this embodiment is different from the first embodiment in that the threaded rod 23 and the latch 36 are provided so that the latch 36 can slide along the latch rod 21 by rotating the threaded rod 23, thereby performing fine adjustment work when the thickness of the wellhead casing coupling b is large, and providing stability and adaptability.
As a further aspect of the present invention, the outer ends of the rack bars 19 are each bent to one side.
The initial restriction can be performed by bending the rack bar 19, and the rack bar 19 is prevented from sliding out along the guide hole 18 due to other factors.
As a further scheme of the invention, the locking group comprises a second gear 24, the second gear 24 is rotatably connected to the bottom of one side of the rack bar 19, which is close to the center point of the connecting ring 5, the bottom end of the second gear 24 is fixedly connected with a contact wheel 25, the second gear 24 is meshed with a third gear 26, the third gear 26 is rotatably connected to the bottom of the rack bar 19, the fixed bottom end of the third gear 26 is fixedly connected with a blocking bar 27, and the rotating shaft of the third gear 26 is sleeved with a torsion spring 28.
As shown in fig. 6-9 and 11:
When the unidirectional limiting group releases the limitation on the connecting ring 5, the rack bar 19 approaches the wellhead take-over collar 2, and the blocking bar 27 is inclined under the action of the torsion spring 28 and is positioned in front of the rack bar 19, so that the rack bar 19 contacts the wellhead casing collar b when approaching the wellhead casing collar b, and the angle of inclination of the blocking bar 27 is gradually increased due to the guiding of the rack bar 19 during the advancing process, and the torsion spring 28 is gradually compressed, and the second gear 24 and the third gear 26 are gradually meshed during the process;
When the clamping rod 21 is contacted with the wellhead casing coupling b, the contact wheel 25 is contacted with the wellhead casing coupling b, and the unidirectional limiting group limits the connecting ring 5 again, so that the connecting ring 5 cannot reversely rotate;
Then, connection work can be performed, in the connection work, the rotation direction of the thrust rod is consistent with the inclination direction of the blocking rod 27 when the thrust rod rotates the inserted rod 14 and the second threaded cylinder 7, along with the engagement of threads, friction force between the first threaded cylinder 6 and the second threaded cylinder 7 and between the casing nipple external thread a and the wellhead casing coupling b can be gradually increased, the situation that the connecting ring 5 drives the rack rod 19 and the blocking rod 21 to rotate around the wellhead casing coupling b can be possibly caused, when the connecting ring 5 drives the rack rod 19 and the blocking rod 21 to rotate around the wellhead casing coupling b, the contact wheel 25 rotates along the wellhead casing coupling b and drives the third gear 26 to rotate through the second gear 24, then the third gear 26 drives the blocking rod 27 to swing reversely, and the rotation direction of the blocking rod 27 is opposite to the rotation direction of the connecting ring 5, so that the connecting ring 5 can not rotate due to the blocking of the blocking rod 27 but is blocked on the wellhead casing coupling b, and the unidirectional limiting group can limit the rotation of the connecting ring 5, so that the connecting ring 5 can not drive the connecting rod 19 to rotate, and the connection work efficiency of the connecting rack rod 19 cannot be prevented;
the manner of securing by blocking the rod 27 is more efficient than the conventional manner of securing by clamping, is more secure, and does not damage the wellhead casing collar b surface.
As a further scheme of the invention, the unidirectional limiting group comprises a second arc-shaped rack bar 29 and a fourth gear 30, wherein the second arc-shaped rack bar 29 is fixedly connected to the outer side wall of the support ring 15, the fourth gear 30 is slidably connected with a guide bar 31, the guide bar 31 is fixedly connected to the support ring 15, a second spring is arranged between the guide bar and the fourth gear (30), and the second spring is sleeved outside the guide bar.
As shown in fig. 9 and 10, when the connecting ring 5 and the supporting ring 15 just pass through the wellhead casing coupling b, the fourth gear 30 limits the second arc-shaped rack bar 29, so that the second arc-shaped rack bar 29 and the connecting ring 5 cannot rotate, so that the first spring 17 is kept in a stretched state, the fourth gear 30 is pressed downwards until the supporting ring 15 is lifted to the top end of the clamping rod 21 higher than the wellhead casing coupling b, the fourth gear 30 slides along the guide rod 31 and presses the second spring 33 downwards (the guide rod 31 is not a round rod, and the fourth gear 30 can only slide along the guide rod 31 but cannot rotate), at the moment, the fourth gear 30 is lowered to be lower than the height of the second arc-shaped rack bar 29, and at the moment, the first spring 17 pulls the connecting ring 5 to rotate, so that the rack rod 19 and the clamping rod 21 can be positioned outside the wellhead casing coupling b;
Then, the fourth gear 30 is released again, and the fourth gear 30 will slide up along the guide rod 31 and then mesh with the second arc-shaped rack bar 29 again, so as to limit the connecting ring 5 and the supporting ring 15, and avoid instability between the two.
As a further scheme of the invention, the connecting ring 5 is fixedly connected with a handrail 34, and the supporting ring 15 is fixedly connected with a push rod 35.
As shown in fig. 6, the rotation of the link ring 5 and the support ring 15 is facilitated by the handrails 34 and the push rods 35.
The embodiments of the present invention described above are merely examples, and those skilled in the art to which the present invention pertains may make various modifications or derive equivalent other embodiments. Accordingly, the present invention is not limited to the embodiments mentioned in the above detailed description. Therefore, the true technical scope of the present invention should be determined according to the technical ideas of the scope of the appended claims. Moreover, it should be understood that the invention includes all modifications, equivalents and alternatives falling within the spirit and scope of the invention as defined by the appended claims.
Claims (5)
1. The utility model provides a 175MPa superhigh pressure gas production wellhead assembly, includes gas production tree (1), gas production tree (1) bottom is provided with ring flange (3), be provided with bolt hole (4), its characterized in that on ring flange (3): a connecting group and a fixing group are arranged below the flange plate (3);
The connecting group comprises a connecting ring (5), a first threaded cylinder (6) and a second threaded cylinder (7), wherein the first threaded cylinder (6) is fixedly connected to the top end of the connecting ring (5), matched threads are respectively arranged on the outer part of the first threaded cylinder (6) and the inner part of the second threaded cylinder (7), a plurality of U-shaped frames (8) are fixedly connected to the outer side wall of the second threaded cylinder (7), first air cylinders (9) are fixedly connected to the inner wall of each U-shaped frame (8), cross rods (10) are fixedly connected to the top ends of the first air cylinders (9), support rods (12) are fixedly connected to the top ends of the cross rods (10), second air cylinders (11) are fixedly connected to the inner sides of the cross rods (10), positioning rods (13) are fixedly connected to the top ends of the support rods (12), and inserting rods (14) are fixedly connected to the side walls of the second threaded cylinders (7);
The fixing group is used for installing and detaching the connecting ring (5) and positioning the connecting group;
The fixed group comprises a supporting ring (15) and a guide hole (18), the supporting ring (15) is positioned under the connecting ring (5), a chute (16) is formed in the top of the supporting ring (15), the chute (16) is arc-shaped, the bottom end of the connecting ring (5) is positioned inside the chute (16) and is in sliding connection with the chute (16), a first spring (17) is fixedly connected between the chute (16) and the connecting ring (5), the guide hole (18) is formed on the connecting ring (5) at equal distance by taking the central point of the connecting ring (5) as the center, rack bars (19) are slidably connected inside the guide hole (18), the rack bars (19) are meshed with first gears (20), the first gears (20) are rotatably connected with the connecting ring (5), clamping bars (21) are fixedly connected to one sides of the top ends of the rack bars (19) close to the circle center of the connecting ring (5), the clamping bars (21) can be clamped at the top of a wellhead casing (2), the first gears (20) are meshed with first arc-shaped inner side walls (22) of the first gears (22) which are meshed with the first gears (22) on the first arc-shaped inner side walls, when the first arc-shaped rack bar (22) rotates around the center point, the rack bar (19) is driven to slide along the guide hole (18) through the first gear (20);
The fixed group further comprises a clamping group and a one-way limiting group, the number of the clamping group and the number of the rack bars (19) are the same, the one-way limiting group is used for limiting the connecting ring (5) and the sliding direction, and the clamping group and the one-way limiting group are matched to prevent the connecting group from rotating around the outer wall of the wellhead casing coupling through friction force when the second threaded cylinder (7) rotates;
The locking group comprises a second gear (24), the second gear (24) is rotationally connected to the bottom of one side, close to the center point of the connecting ring (5), of the rack bar (19), a contact wheel (25) is fixedly connected to the bottom end of the second gear (24), a third gear (26) is meshed with the second gear (24), the third gear (26) is rotationally connected to the bottom of the rack bar (19), a blocking rod (27) is fixedly connected to the fixed bottom end of the third gear (26), and a torsion spring (28) is sleeved on a rotating shaft of the third gear (26);
The unidirectional limiting group comprises a second arc-shaped rack rod (29) and a fourth gear (30), the second arc-shaped rack rod (29) is fixedly connected to the outer side wall of the supporting ring (15), the fourth gear (30) is slidably connected with a guide rod (31), the guide rod (31) is fixedly connected to the supporting ring (15), a second spring (33) is arranged between the guide rod (31) and the fourth gear (30), and the second spring (33) is sleeved outside the guide rod (31).
2. The 175MPa ultra-high pressure gas production wellhead device of claim 1, wherein: the clamping rod (21) is L-shaped integrally, and the top end of the clamping rod can be hung on a wellhead casing coupling.
3. The 175MPa ultra-high pressure gas production wellhead device of claim 1, wherein: the top of clamping rod (21) all sliding connection has fixture block (36), clamping rod (21) rotate and are connected with threaded rod (23), threaded rod (23) and fixture block (36) threaded connection.
4. The 175MPa ultra-high pressure gas production wellhead device of claim 1, wherein: the outer ends of the rack bars (19) are bent to one side.
5. The 175MPa ultra-high pressure gas production wellhead device of claim 1, wherein: the connecting ring (5) is fixedly connected with a handrail (34), and the supporting ring (15) is fixedly connected with a push rod (35).
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| CN202410274523.9A CN118029936B (en) | 2024-03-11 | 2024-03-11 | 175MPa superhigh pressure gas production wellhead device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202410274523.9A CN118029936B (en) | 2024-03-11 | 2024-03-11 | 175MPa superhigh pressure gas production wellhead device |
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| CN118029936B true CN118029936B (en) | 2024-08-30 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110094178A (en) * | 2019-05-31 | 2019-08-06 | 中国石油集团川庆钻探工程有限公司 | Wellhead resetting device and method suitable for flange with bottom |
| CN113216890A (en) * | 2020-02-04 | 2021-08-06 | 中国石油天然气股份有限公司 | Fixing and adjusting device and adjusting method for oil well casing |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2554463B (en) * | 2016-09-29 | 2019-09-18 | Subsea 7 Do Brasil Servicos Ltda | Assembling flanged couplings |
| CN114753789B (en) * | 2022-05-27 | 2024-04-09 | 吴海军 | Installation device with anti-eccentric function for oilfield christmas tree |
| CN116122758A (en) * | 2022-09-12 | 2023-05-16 | 胜利油田胜机石油装备有限公司 | Christmas tree wellhead connecting device capable of uploading pressure data in real time |
| CN219826759U (en) * | 2023-05-20 | 2023-10-13 | 江苏双辉机械制造有限公司 | Auxiliary device is connected to casing head bottom |
| CN116927708B (en) * | 2023-07-27 | 2024-11-19 | 盐城佰信石油机械有限公司 | Casing head with pressure relief structure |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110094178A (en) * | 2019-05-31 | 2019-08-06 | 中国石油集团川庆钻探工程有限公司 | Wellhead resetting device and method suitable for flange with bottom |
| CN113216890A (en) * | 2020-02-04 | 2021-08-06 | 中国石油天然气股份有限公司 | Fixing and adjusting device and adjusting method for oil well casing |
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| CN118029936A (en) | 2024-05-14 |
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