Whole-cycle self-adaptive anchoring oil well drilling liner hanger

Abstract

The invention discloses a full-circumference self-adaptive anchoring oil well drilling liner hanger, and belongs to the technical field of drilling liner hangers, the full-circumference self-adaptive anchoring oil well drilling liner hanger comprises an outer cylinder, a sleeve is arranged at the bottom of the outer cylinder, a connecting cylinder is arranged at the top of the outer cylinder, a plurality of through grooves are formed in the connecting cylinder, and mounting blocks are slidably arranged in the through grooves; a slip is mounted on the mounting block, and a convex block is mounted outside the slip; one-way linear motion of the connecting frame is converted into synchronous radial expansion motion of the multiple sets of slips through the driving assembly, the slips slide in the through grooves through the mounting blocks, the radial displacement of the slips is determined by the motion stroke of the driving assembly, and the device can effectively adapt to tail pipes with different diameters within a certain range; the universality and field applicability of the tool are improved, a first electric telescopic machine drives a locking pin to be inserted into a locking hole in a vertical plate, the positions of a first moving block and a second moving block can be mechanically locked, and then the whole driving assembly and the slip are fixed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of tailpipe hangers, and particularly relates to a full-circle self-adaptive anchoring oil well tailpipe hanger. BACKGROUND

[0002] The tailpipe hanger is a downhole tool used in oil and gas exploitation oil and gas wells, and the main function of the tailpipe hanger is to fix the tailpipe near the wellhead and provide support force to ensure that the tailpipe is stable, fixed and vertically extended to the target formation and prevent accidental displacement or tilting of the tailpipe during operation.

[0003] The existing tailpipe hanger has the possibility of sliding when the slip and the tail wall are in contact during the limiting and fixing of tailpipes with different diameters, and therefore the present application provides a full-circle self-adaptive anchoring oil well tailpipe hanger. SUMMARY

[0004] In view of the deficiencies of the prior art, the present application provides a full-circle self-adaptive anchoring oil well tailpipe hanger, which overcomes the deficiencies of the prior art and aims to solve the problems in the background art.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a full-circle self-adaptive anchoring oil well tailpipe hanger, comprising an outer cylinder, a sleeve is arranged at the bottom of the outer cylinder, a connecting cylinder is arranged at the top of the outer cylinder, a plurality of through grooves are arranged in the connecting cylinder, an installation block is slidably arranged in the through grooves, a slip is arranged on the installation block, a protrusion is arranged outside the slip, a frame is fixedly arranged in the outer cylinder, a recess is arranged at the top of the frame, a connecting frame is slidably arranged in the recess, and a driving assembly is arranged in the frame, and the full-circle self-adaptive anchoring oil well tailpipe hanger further comprises: The driving assembly comprises a vertical plate, a first moving block, a second moving block and a second rotating rod, the vertical plate is symmetrically arranged in the frame, the first moving block and the second moving block are slidably arranged between the vertical plate, the second rotating rod is hinged to the first moving block and the second moving block, and a fixed block is hingedly arranged at the end of the second rotating rod, and the fixed block is fixedly connected with the installation block.

[0006] In a preferred example, the outer side of the vertical plate is provided with a first movable slot and a second movable slot, a first movable plate is slidably arranged in the first movable slot, the second movable slot comprises a second movable slot one and a second movable slot two, a second movable plate is slidably arranged in the second movable slot one, and a third movable plate is slidably arranged in the second movable slot two.

[0007] The application can be further configured in a preferred example that the first movable plate is fixedly connected with the first moving block, the third movable plate is fixedly connected with the second moving block, the middle part of the vertical plate with the second movable slot is provided with a transmission gear, the first connecting rod is fixedly connected with the second movable plate and the third movable plate, the opposite surface of the first connecting rod is provided with a rack, and the rack is engaged with the transmission gear.

[0008] The application can be further configured in a preferred example that a plurality of limiting frames are welded on the vertical plate, and the limiting frames are arranged in abutment with the first connecting rod.

[0009] The application can be further configured in a preferred example that the connecting frame is fixedly connected with the first movable plate and the second movable plate, and the first movable plate and the second movable plate are arranged on the same horizontal plane.

[0010] The application can be further configured in a preferred example that the first electric telescopic machine is installed on the connecting frame, the end of the first electric telescopic machine is provided with a locking pin, the vertical plate is provided with an inner slot, a plurality of locking holes are arranged in the inner slot, and the locking pin can be embedded in the locking hole.

[0011] The application can be further configured in a preferred example that the inner wall of the outer cylinder is provided with a hydraulic assembly at the top of the frame, the hydraulic assembly is provided with a movable head, the movable head is provided with an empty slot on one side, the empty slot is provided with a rotating sleeve through a first rotating rod, and the rotating sleeve is fixedly provided with a pressing plate.

[0012] The application can be further configured in a preferred example that the rotating sleeve is provided with a circular hole, the two sides of the empty slot are provided with electric push rods, and the end of the electric push rod is provided with a movable rod matched with the circular hole.

[0013] The application can be further configured in a preferred example that the movable head is provided with a first driving motor, the output end of the first driving motor is connected with the first rotating rod, and the first rotating rod is driven to rotate.

[0014] The application has the following beneficial effects: The application can convert the one-way linear motion of the connecting frame into the synchronous radial expansion motion of the plurality of slips through the driving assembly, so that all the slips can simultaneously and uniformly abut against the tail pipe well wall to realize full-contact, and the single-point stress concentration or sliding risk caused by uneven stress is avoided. The slip slides in the through slot through the mounting block, and the radial displacement amount of the slip is determined by the movement stroke of the driving assembly. The transmission mechanism can ensure that the slip continuously pushes out until closely abuts against the well wall, so that the tool can effectively adapt to the tail pipe with different diameters within a certain range, and the universality and field applicability of the tool are improved. Once the slip is anchored in place, the locking pin is inserted into the locking hole on the vertical plate by the first electric telescopic mechanism. This mechanically locks the positions of the first and second moving blocks, thereby fixing the entire drive assembly and slip. This effectively prevents the risk of slip retraction due to downhole pressure or vibration, ensuring the long-term effectiveness of the anchoring effect. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall main structure of the present invention; Figure 2 This is a top view of the overall structure of the present invention; Figure 3 This is a cross-sectional view of the connecting cylinder structure of the present invention; Figure 4 This is a schematic diagram of the framework structure of the present invention; Figure 5 This is a schematic diagram of the vertical plate structure of the present invention; Figure 6 This is a schematic diagram of the first movable plate structure of the present invention; Figure 7 For the present invention Figure 6 Schematic diagram of the structure at point A in the middle; Figure 8 This is a schematic diagram of the first connecting rod structure of the present invention; Figure 9 This is a schematic diagram of the mounting block structure of the present invention; Figure 10 This is a schematic diagram of the mounting block assembly structure of the present invention; Figure 11 This is a schematic diagram of the movable head structure of the present invention; Figure 12 This is a schematic diagram of the connecting frame structure of the present invention.

[0016] In the diagram: 1. Sleeve; 2. Outer cylinder; 3. Connecting cylinder; 4. Slipper; 5. Sealing sleeve; 6. Protrusion; 7. Moving head; 8. Frame; 9. Vertical plate; 10. Hollow groove; 11. Rotating sleeve; 12. First rotating rod; 13. Pressure plate; 14. Embedded groove; 15. Through groove; 16. Second moving block; 17. Groove; 18. Connecting frame; 19. First electric telescopic mechanism; 20. Locking pin; 21. Inner groove; 22. First movable plate; 23. Second movable plate; 24. First movable groove; 25. Third movable plate; 26. First connecting rod; 27. Second movable groove; 271. Second movable groove one; 272. Second movable groove two; 28. Transmission gear; 29. ​​Limiting frame; 30. Mounting block; 31. First moving block; 32. Second rotating rod; 33. Fixed block. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Please see Figures 1-12 A fully adaptive anchoring oil well tailpipe hanger includes an outer cylinder 2. A casing 1 is integrally formed and installed at the bottom of the outer cylinder 2. Two sets of connecting cylinders 3 are welded to the top of the outer cylinder 2. A sealing sleeve 5 is fitted at the joint of the connecting cylinders 3. Three through grooves 15 are opened inside the connecting cylinders 3. An installation block 30 is slidably arranged in the three through grooves 15. A slip 4 is welded to the outside of the outer cylinder 2 through the installation block 30. A recess is opened on the outer surface of the outer cylinder 2 corresponding to the slip 4. Several protrusions 6 are provided on the surface of the slip 4. A drive assembly is provided inside the outer cylinder 2. The drive assembly includes a frame 8 welded inside the outer cylinder 2. Two symmetrically arranged vertical plates 9 are welded inside the frame 8. A first moving block 31 and a second moving block 16 are slidably arranged between the vertical plates 9. A second rotating rod 32 is hinged to both the first moving block 31 and the second moving block 16. A fixed block 33 is hinged to the second rotating rod 32. The fixed block 33 is welded and fixed to the slip 4.

[0019] Furthermore, the mounting block 30 is positioned in abutment against the through groove 15, and the first moving block 31 is positioned above the second moving block 16.

[0020] The outer sides of the two vertical plates 9 are respectively provided with a first movable groove 24 and a second movable groove 27. The second movable groove 27 includes a second movable groove 1 271 and a second movable groove 272. A first movable plate 22 is slidably arranged in the first movable groove 24, a second movable plate 23 is slidably arranged in the second movable groove 1 271, and a third movable plate 25 is slidably arranged in the second movable groove 272. A first connecting rod 26 is welded on both the second movable plate 23 and the third movable plate 25. A transmission gear 28 is installed in the middle of the vertical plate 9 with the second movable plate 23 through a coupling. A rack that meshes with the transmission gear 28 is provided on the opposite side of the first connecting rod 26.

[0021] Furthermore, the second movable groove 271 is located on the side away from the outer cylinder 2, and the second movable groove 272 is located on the side close to the outer cylinder 2.

[0022] Several limit frames 29 are also welded onto the vertical plate 9, which is equipped with transmission teeth 28. The limit frames 29 are all set to abut against the first connecting rod 26.

[0023] Furthermore, the first movable plate 22 is welded and fixed to the first moving block 31, and the third movable plate 25 is welded and fixed to the second moving block 16.

[0024] The top of the frame 8 is provided with a groove 17, and a connecting frame 18 is slidably disposed in the groove 17. The connecting frame 18 is welded and fixed to the first movable plate 22 and the second movable plate 23. Furthermore, one side of the connecting frame 18 extends to the outside of the frame 8, and the length between the connecting frame 18 and the first movable plate 22 is greater than the length between the connecting frame 18 and the second movable plate 23.

[0025] Specifically, the connecting frame 18 is located between the frame 8 and the vertical plate 9 and a first electric telescopic mechanism 19 is welded thereon. The end of the first electric telescopic mechanism 19 is equipped with a locking pin 20. The frame 8 has an inner groove 21 corresponding to the locking pin 20, and a number of locking holes are provided in the inner groove 21.

[0026] The inner wall of the outer cylinder 2 is threaded with a hydraulic assembly at the top of the frame 8. A movable head 7 is installed on the hydraulic assembly. A slot 10 is opened on one side of the movable head 7. A first rotating rod 12 is installed in the middle of the slot 10 through a coupling. A rotating sleeve 11 is sleeved on the first rotating rod 12. A pressure plate 13 is welded on the rotating sleeve 11.

[0027] Specifically, the surface of the connecting frame 18 has an embedding groove 14 corresponding to the pressure plate 13. The pressure plate 13 is inserted into the embedding groove 14 on the surface of the connecting frame 18, causing the connecting frame 18 to move downward.

[0028] Furthermore, a high-strength spring (not shown in the figure) is welded into the slot 10 opened on the movable head 7. The other end of the spring is welded and fixed to the pressure plate 13. The high-strength spring is set above the pressure plate 13, and the pressure plate 13 is controlled to abut against the connecting frame 18 by the spring.

[0029] Working principle: When this device is in use, the tail tube is threaded to the sleeve 1, and the movable head 7 is driven to move down by the hydraulic assembly. The spring installed in the slot 10 on one side of the movable head 7 drives the rotating sleeve 11 and the pressure plate 13 to rotate to the top of the connecting frame 18 and to abut against the connecting frame 18. The bottom of the pressure plate 13 moves into the embedded groove 14 of the connecting frame 18, and then the connecting frame 18 is driven to move down by the pressure plate 13. The connecting frame 18 drives the first movable plate 22 and the second movable plate 23 located on the same plane to move down. The first movable plate 22 moves down, causing the first movable block 31 welded to it to move down. The second movable plate 23 moves down, causing the first connecting rod 26 to move down. The first connecting rod 26 connected to the second movable plate 23 drives the transmission gear 28 to rotate. The rotation of the transmission gear 28 drives the first connecting rod 26 connected to the third movable plate 25 to rotate, thereby achieving the purpose of driving the second movable block 16 to move upward. By moving the first movable block 31 and the second movable block 16 towards each other, the hinged second rotating rod 32 is driven to rotate, thereby driving the mounting block 30 and the slip 4 to move outward, thus limiting the contact of tailpipes with different diameters. Simultaneously, after the hydraulic components drive the different moving heads 7 to move downwards until the slip 4 contacts the external tailpipe, the first electric telescopic mechanism 19 controls the locking pin 20 to embed into the locking hole in the inner groove 21. The locking pin 20 and the locking hole work together to fix the first moving block 31 and the second moving block 16, thereby fixing the position of the slip 4. The pressure plate 13 is then retracted into the empty groove 10, and the hydraulic components are reset.

[0030] Furthermore, the length of the extended part of the slip 4 is set to a. By moving the connecting frame 18 downward, the distance between the first moving block 31 and the second moving block 16 is reduced. At the same time, the angle of the second rotating rod 32 hinged on the first moving block 31 and the second moving block 16 changes, which in turn affects the distance that the mounting block 30 slides in the through groove 15, which is the length a of the extended part of the slip 4.

[0031] Furthermore, a distance sensor is installed at the bottom of the slip 4. The system analyzes the distance between the slip 4 and the pipe wall through the distance sensor and sets the initial distance between the slip 4 and the pipe wall as b0. At the same time, due to the shape of the well barrel and the possible protrusions and depressions inside the pipe wall, the data read by different distance sensors will be different, that is, the required extension length of different slips 4 is not consistent.

[0032] Therefore, in the initial state of the system, the hydraulic components push the three movable heads 7 downward, thereby controlling and driving all slips 4 to start radial expansion movement simultaneously, that is, a begins to increase. At the same time, because the b0 value corresponding to each slip 4 is different, those slips 4 with smaller b0, that is, those slips 4 closer to the well wall, will contact the well wall first, that is, a=b0. Once in contact, the well wall will generate a reaction force on the slip 4, preventing it from moving further radially, and controlling the movable head 7 corresponding to the slip 4 to stop working. At this time, the locking pin 20 is embedded in the locking hole in the inner groove 21 by the first electric telescopic mechanism 19. The locking pin 20 and the locking hole are used to fix the first moving block 31 and the second moving block 16, thereby fixing the position of the slip 4. At the same time, the pressure plate 13 cannot apply pressure to the fixed connecting frame 18. Therefore, the pressure plate 13 squeezes the spring, and the rotating sleeve 11 and the pressure plate 13 rotate until they retract into the empty groove 10. The movable head 7 continues to move downward, but does not drive the connecting frame 18 to move.

[0033] At this time, the hydraulic assembly controls the remaining moving heads 7 to continue working, and the slips 4 that have not yet been contacted will continue to expand outward until they also contact the well wall. Then the hydraulic assembly stops working, and the locking pin 20 is inserted into the locking hole in the inner groove 21 by the first electric telescopic mechanism 19 to complete the limiting process.

[0034] This mechanism ensures that each slip 4 can move independently to a position that is in close contact with the well wall, without the other hydraulic components being prevented from controlling the movement of other slips 4 because one slip 4 makes contact first.

[0035] Ultimately, all Kava 4s will overcome their respective b0 and make contact with the pipe wall.

[0036] b has different distances in different directions, which is a real and common situation in downhole operations. By using a synchronous hydraulic drive source, in conjunction with the independently movable slip 4 and the hinged first rotating rod 12 to control the rotation sleeve 11 and the pressure plate 13 to move the slip 4 to the same distance as the different initial distances b0 in each direction, a truly reliable full-circumference anchoring can be achieved.

[0037] Finally, it should be noted that in the description of this invention, the terms "vertical," "upper," "lower," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0038] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0039] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A fully adaptive anchoring oil well tailpipe hanger, characterized in that, The system includes an outer cylinder (2), a sleeve (1) at the bottom of the outer cylinder (2), a connecting cylinder (3) at the top of the outer cylinder (2), several through slots (15) inside the connecting cylinder (3), a mounting block (30) slidably disposed inside the through slots (15), a slip (4) mounted on the mounting block (30), a protrusion (6) mounted on the outside of the slip (4), a frame (8) fixedly mounted inside the outer cylinder (2), a groove (17) at the top of the frame (8), a connecting bracket (18) slidably disposed inside the groove (17), and a driving assembly inside the frame (8). The system also includes: The driving assembly includes a vertical plate (9), a first moving block (31), a second moving block (16), and a second rotating rod (32). The vertical plate (9) is symmetrically arranged in the frame (8). The first moving block (31) and the second moving block (16) are slidably arranged between the vertical plate (9). The second rotating rod (32) is hinged to the first moving block (31) and the second moving block (16), and a fixing block (33) is hinged to the end of the second rotating rod (32). The fixing block (33) is fixedly connected to the mounting block (30).

2. The fully adaptive anchoring oil well tailpipe hanger according to claim 1, characterized in that, The outer side of the vertical plate (9) is provided with a first movable groove (24) and a second movable groove (27). A first movable plate (22) is slidably arranged in the first movable groove (24). The second movable groove (27) includes a second movable groove one (271) and a second movable groove two (272). A second movable plate (23) is slidably arranged in the second movable groove one (271), and a third movable plate (25) is slidably arranged in the second movable groove two (272).

3. The fully adaptive anchoring oil well tailpipe hanger according to claim 2, characterized in that, The first movable plate (22) is fixedly connected to the first moving block (31), the third movable plate (25) is fixedly connected to the second moving block (16), and a transmission tooth (28) is installed in the middle of the vertical plate (9) with the second movable groove (27). A first connecting rod (26) is fixedly connected to both the second movable plate (23) and the third movable plate (25). A rack is provided on the opposite side of the first connecting rod (26), and the rack meshes with the transmission tooth (28).

4. The fully adaptive anchoring oil well tailpipe hanger according to claim 3, characterized in that, A plurality of limiting frames (29) are welded on the vertical plate (9), and the limiting frames (29) are arranged to abut against the first connecting rod (26).

5. The fully adaptive anchoring oil well tailpipe hanger according to claim 3, characterized in that, The connecting frame (18) is fixedly connected to the first movable plate (22) and the second movable plate (23), and the first movable plate (22) and the second movable plate (23) are arranged on the same horizontal plane.

6. The fully circumferential adaptive anchoring oil well tailpipe hanger according to claim 1, characterized in that, The connecting frame (18) is equipped with a first electric telescopic mechanism (19), and the end of the first electric telescopic mechanism (19) is provided with a locking pin (20). The frame (8) is provided with an inner groove (21), and the inner groove (21) is provided with a plurality of locking holes. The locking pin (20) can be embedded in the locking holes.

7. The fully adaptive anchoring oil well tailpipe hanger according to claim 1, characterized in that, The inner wall of the outer cylinder (2) is equipped with a hydraulic assembly at the top of the frame (8). A movable head (7) is installed on the hydraulic assembly. A slot (10) is opened on one side of the movable head (7). A rotating sleeve (11) is installed in the slot (10) through the first rotating rod (12). A pressure plate (13) is fixed on the rotating sleeve (11).

8. The fully adaptive anchoring oil well tailpipe hanger according to claim 7, characterized in that, The upper surface of the connecting frame (18) is provided with an embedding groove (14), and the pressure plate (13) extends into the interior of the embedding groove (14).

9. A fully circumferential adaptive anchoring oil well tailpipe hanger according to claim 7, characterized in that, The movable head (7) is equipped with a first drive motor, the output end of which is connected to the first rotating rod (12) to drive the first rotating rod (12) to rotate.

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