Downhole falling object prevention device for workover treatment

Abstract

The utility model discloses an underground anti-falling device for workover treatment, which relates to the technical field of drilling engineering, and comprises an oil well pipe, a mounting ring is in contact connection with the oil well pipe, a limiting ring is arranged on the mounting ring, the limiting ring is clamped in the oil well pipe, support plates are fixedly arranged on two sides of the mounting ring, and the support plates are fixedly connected with the oil well pipe. A threaded rod is rotationally connected to the supporting plate, a clamping plate is rotationally connected to one end of the threaded rod, and one end of the clamping plate is connected with the mounting ring through a first limiting assembly; the mounting ring is connected with a connecting ring through a buffer assembly, and the connecting ring is connected with a blocking cover through a clamping mechanism. The clamping plate is driven by the threaded rod to be connected with an oil well pipe, the device can be conveniently installed and fixed, the installation stability is improved, the blocking cover can effectively prevent stones, dust and other sundries which possibly fall off in the construction process from entering a well, and underground personnel and equipment are prevented from being damaged.

Description

Technical Field

[0001] The utility model relates to the technical field of drilling engineering, in particular to an underground falling object prevention device for well repair operations. Background Art

[0002] During well repair work, the phenomenon of falling objects often occurs in oil well pipes. Except for normal drilling, oil well pipes are often in an unsealed state. Oil well pipes are the place where falling objects are most likely to occur. Objects fall from the oil well pipes into the well, resulting in operation interruption, equipment damage and even casualties.

[0003] In related art, protective plates are installed on oil well pipes to prevent objects from falling through them. These plates are connected to the pipes via an annular support plate, which sleeves onto the pipes. Under external impact or prolonged use, the support plate may loosen or deform, compromising the stability and safety of the plates. This instability may cause the plates to fall off or shift, increasing the risk of accidents at the pipes. Therefore, those skilled in the art have provided a downhole falling object prevention device for well repair operations to address the issues raised in the background art. Utility Model Content

[0004] The purpose of the utility model is to provide an underground falling object prevention device for well repair operations, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A downhole falling object prevention device for well repair operations, comprising:

[0007] An oil well pipe, wherein the oil well pipe is contact-connected with a mounting ring, the mounting ring is provided with a limiting ring, the limiting ring is clamped in the oil well pipe, support plates are fixedly provided on both sides of the mounting ring, a threaded rod is rotatably connected to the support plate, one end of the threaded rod is rotatably connected to a clamping plate, and one end of the clamping plate is connected to the mounting ring via a first limiting assembly;

[0008] The mounting ring is connected to a connecting ring via a buffer assembly, and the connecting ring is connected to a blocking cover via a locking mechanism.

[0009] Preferably, a first turning handle is fixedly provided at the other end of the threaded rod, and a rubber layer is provided on the side of the clamping plate facing away from the threaded rod, and the rubber layer is in contact with and connected to the oil well pipe.

[0010] Preferably, the first limiting assembly includes a first limiting block, the first limiting block is fixedly arranged on the clamping plate, and the mounting ring is provided with a first limiting groove for sliding connection of the first limiting block.

[0011] Preferably, the buffer assembly includes two side rings, a movable ring, a plurality of buffer springs and a plurality of dampers. The two side rings are fixedly arranged on the mounting ring, the movable ring is fixedly connected to the connecting ring, one end of the movable ring is slidingly connected between the two side rings, the buffer spring is sleeved on the outside of the damper, and the two ends of the buffer spring and the damper are respectively connected to the mounting ring and the movable ring.

[0012] Preferably, a connecting groove is provided on the connecting ring, and the blocking cover is engaged in the connecting groove.

[0013] Preferably, the locking mechanism includes a rotating rod, a rotating disk, a moving block and a locking plate, the rotating rod is rotatably connected to the blocking cover, the rotating disk is fixedly arranged at one end of the rotating rod, and a second rotating handle is provided at the other end of the rotating rod, a connecting rod is rotatably connected between the moving block and the rotating disk, one end of the locking plate is fixedly connected to the moving block, and the other end of the locking plate is locked and connected to the connecting ring, and the moving block is connected to the blocking cover through a second limiting assembly.

[0014] Preferably, the second limiting assembly includes a second limiting block, the second limiting block is connected to the moving block, and the blocking cover is provided with a second limiting groove for sliding connection of the second limiting block.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. The utility model drives the clamping plate to connect with the oil well pipe through the threaded rod, which is convenient for fixing the device and improving the installation stability. The blocking cover can effectively prevent stones, dust and other debris that may fall during the construction process from entering the well, avoiding damage to underground personnel and equipment. Through the setting of the limit ring, the limit can be connected when connected to the oil well pipe, which can improve the installation efficiency of the installation ring.

[0017] 2. The utility model can provide a buffer when the cover is impacted by the buffer component, thereby reducing damage to the cover. The locking mechanism can facilitate the opening of the cover, making it easier for construction personnel to enter the well and improving maintenance efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic structural diagram of a downhole falling object prevention device for well repair operations according to an embodiment of the present application;

[0019] Figure 2 This is a schematic diagram of a front cross-sectional structure of a downhole falling object prevention device for well repair operations according to an embodiment of the present application;

[0020] Figure 3 This is a schematic side cross-sectional structural diagram of a downhole falling object prevention device for well repair operations according to an embodiment of the present application;

[0021] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0022] Figure 5 This is a schematic diagram of the cross-sectional structure of a moving ring of a downhole falling object prevention device used in well repair operations in an embodiment of the present application.

[0023] In the figure: 1. oil well pipe; 2. mounting ring; 3. limiting ring; 4. supporting plate; 5. threaded rod; 6. clamping plate; 7. connecting ring; 8. blocking cover; 9. first rotating handle; 10. rubber layer; 11. first limiting block; 12. first limiting groove; 13. side ring; 14. moving ring; 15. buffer spring; 16. damper; 17. connecting groove; 18. rotating rod; 19. turntable; 20. moving block; 21. engaging plate; 22. second rotating handle; 23. connecting rod; 24. second limiting block; 25. second limiting groove. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] See also Figure 1-Figure 5 , the utility model provides a technical solution:

[0026] A downhole falling object prevention device for well repair operations, comprising:

[0027] An oil well pipe 1 is provided. A mounting ring 2 is in contact with and connected to the oil well pipe 1. A limiting ring 3 is provided on the mounting ring 2. The limiting ring 3 is engaged with the oil well pipe 1. Support plates 4 are fixedly provided on both sides of the mounting ring 2. A threaded rod 5 is rotatably connected to the support plates 4. A clamping plate 6 is rotatably connected to one end of the threaded rod 5. One end of the clamping plate 6 is connected to the mounting ring 2 via a first limiting assembly. A first rotating handle 9 is fixedly provided at the other end of the threaded rod 5. A rubber layer 10 is provided on the side of the clamping plate 6 facing away from the threaded rod 5. The rubber layer 10 is in contact with and connected to the oil well pipe 1.

[0028] When the mounting ring 2 is connected to the oil-well tubular good 1, the limiting ring 3 is engaged in the oil-well tubular good 1. Then, the first turning handle 9 is rotated, and the threaded rod 5 can drive the clamping plate 6 to move. The clamping plate 6 is in contact with the oil-well tubular good 1, and the device can be fixed on the oil-well tubular good 1. The installation stability of the mounting ring 2 can be improved. The provision of the rubber layer 10 can increase the friction of the clamping plate 6, thereby improving the installation stability.

[0029] Furthermore, the first limiting assembly includes a first limiting block 11 , which is fixedly disposed on the clamping plate 6 , and a first limiting groove 12 for sliding connection of the first limiting block 11 is formed on the mounting ring 2 .

[0030] When the clamping plate 6 moves, the first limiting block 11 moves in the first limiting groove 12 to limit the moving route of the clamping plate 6 .

[0031] The mounting ring 2 is connected to the connecting ring 7 via a buffer assembly. The buffer assembly includes two side rings 13, a movable ring 14, a plurality of buffer springs 15, and a plurality of dampers 16. The two side rings 13 are fixedly mounted on the mounting ring 2, the movable ring 14 is fixedly connected to the connecting ring 7, one end of the movable ring 14 is slidably connected between the two side rings 13, the buffer spring 15 is sleeved on the outside of the damper 16, and the ends of the buffer spring 15 and the damper 16 are respectively connected to the mounting ring 2 and the movable ring 14;

[0032] When the blocking cover 8 is impacted, the moving ring 14 moves between the two side rings 13 , and the moving ring 14 squeezes the buffer spring 15 and the damper 16 . The buffer spring 15 and the damper 16 can buffer the impact and reduce damage to the blocking cover 8 .

[0033] The blocking cover 8 is connected to the connecting ring 7 through a locking mechanism. A connecting groove 17 is provided on the connecting ring 7. The blocking cover 8 is locked in the connecting groove 17. The locking mechanism includes a rotating rod 18, a rotating disk 19, a moving block 20 and a locking plate 21. The rotating rod 18 is rotatably connected to the blocking cover 8. The rotating disk 19 is fixedly arranged at one end of the rotating rod 18. A second rotating handle 22 is provided at the other end of the rotating rod 18. A connecting rod 23 is rotatably connected between the moving block 20 and the rotating disk 19. One end of the locking plate 21 is fixedly connected to the moving block 20, and the other end of the locking plate 21 is locked and connected to the connecting ring 7. The moving block 20 is connected to the blocking cover 8 through a second limiting assembly.

[0034] Furthermore, the second limiting assembly includes a second limiting block 24 , which is connected to the moving block 20 , and a second limiting groove 25 for the second limiting block 24 to be slidably connected is formed on the blocking cover 8 .

[0035] When installing the blocking cover 8, the blocking cover 8 is engaged in the connecting groove 17, and then the second rotating handle 22 is rotated, the rotating rod 18 drives the rotating disk 19 to rotate, and the rotating disk 19 drives the moving block 20 to move through the connecting rod 23. When the moving block 20 moves, the second limiting block 24 moves in the second limiting groove 25, which can limit the moving path of the moving block 20. The moving block 20 drives the engaging plate 21 to move, and the engaging plate 21 contacts and connects with the connecting ring 7, and the blocking cover 8 can be engaged and installed;

[0036] When removing the blocking cover 8, the second handle 22 is turned, the rotating rod 18 drives the rotating disk 19 to rotate, and the rotating disk 19 drives the moving block 20 to move through the connecting rod 23, so that the clamping plate 21 is separated from the connecting ring 7, and then the blocking cover 8 is taken out from the connecting groove 17, which makes it easy to open the blocking cover 8 and facilitate construction personnel to enter the well, thereby improving maintenance efficiency;

[0037] The retaining cover 8 can effectively prevent stones, dust and other debris that may fall during the construction process from entering the well, thereby avoiding damage to personnel and equipment underground.

[0038] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A downhole falling object prevention device for well repair operations, characterized in that: include: An oil well pipe (1) is contact-connected with a mounting ring (2) at the oil well pipe (1), a limiting ring (3) is provided on the mounting ring (2), and the limiting ring (3) is engaged in the oil well pipe (1), support plates (4) are fixedly provided on both sides of the mounting ring (2), a threaded rod (5) is rotatably connected to the support plate (4), one end of the threaded rod (5) is rotatably connected to a clamping plate (6), and one end of the clamping plate (6) is connected to the mounting ring (2) through a first limiting assembly; The mounting ring (2) is connected to a connecting ring (7) via a buffer assembly, and the connecting ring (7) is connected to a blocking cover (8) via a snap-fit ​​mechanism.

2. The downhole falling object prevention device for well repair operations according to claim 1, characterized in that: A first turning handle (9) is fixedly provided at the other end of the threaded rod (5), and a rubber layer (10) is provided on the side of the clamping plate (6) facing away from the threaded rod (5), and the rubber layer (10) is in contact with and connected to the oil well pipe (1).

3. The downhole falling object prevention device for well repair operations according to claim 1, characterized in that: The first limiting assembly comprises a first limiting block (11), the first limiting block (11) is fixedly arranged on the clamping plate (6), and the mounting ring (2) is provided with a first limiting groove (12) for sliding connection of the first limiting block (11).

4. The downhole falling object prevention device for well repair operations according to claim 1, characterized in that: The buffer assembly comprises two side rings (13), a movable ring (14), a plurality of buffer springs (15) and a plurality of dampers (16); the two side rings (13) are fixedly arranged on the mounting ring (2); the movable ring (14) is fixedly connected to the connecting ring (7); one end of the movable ring (14) is slidably connected between the two side rings (13); the buffer spring (15) is sleeved on the outside of the damper (16); and the two ends of the buffer spring (15) and the damper (16) are respectively connected to the mounting ring (2) and the movable ring (14).

5. The downhole falling object prevention device for well repair operations according to claim 1, characterized in that: The connecting ring (7) is provided with a connecting groove (17), and the blocking cover (8) is engaged in the connecting groove (17).

6. The downhole falling object prevention device for well repair operations according to claim 1, characterized in that: The locking mechanism comprises a rotating rod (18), a rotating disk (19), a moving block (20) and a locking plate (21); the rotating rod (18) is rotatably connected to the blocking cover (8); the rotating disk (19) is fixedly arranged at one end of the rotating rod (18); a second rotating handle (22) is provided at the other end of the rotating rod (18); a connecting rod (23) is rotatably connected between the moving block (20) and the rotating disk (19); one end of the locking plate (21) is fixedly connected to the moving block (20); the other end of the locking plate (21) is locked and connected to the connecting ring (7); and the moving block (20) is connected to the blocking cover (8) via a second limiting assembly.

7. The downhole falling object prevention device for well repair operations according to claim 6, characterized in that: The second limiting assembly includes a second limiting block (24), the second limiting block (24) is connected to the moving block (20), and the blocking cover (8) is provided with a second limiting groove (25) for sliding connection of the second limiting block (24).

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