Casing running auxiliary tool for petroleum drilling

Abstract

The utility model discloses a casing running auxiliary tool for petroleum drilling, which relates to the technical field of petroleum drilling, and comprises two support frames, the two support frames are connected with a support ring through a lifting mechanism, the support ring is provided with a servo electric cylinder, the servo electric cylinder is connected with a support plate through a buffer component, and the support plate is connected with a hydraulic cylinder. Limiting plates are fixedly arranged at the two ends of the supporting plate, and pulleys are connected to the limiting plates through clamping assemblies. The clamping assembly comprises a clamping plate and a triangular clamping block, the pulley is rotationally connected to the connecting plate, the triangular clamping block is fixedly arranged on the clamping plate, a connecting groove is formed in the limiting plate, the clamping plate is fixedly connected into the connecting groove, and a clamping groove is formed in the connecting plate; according to the pulley, original sliding friction can be converted into rolling friction, scraping and abrasion of the limiting plate to the surface of the casing pipe are reduced, the service life of the casing pipe is effectively prolonged, and the quality and efficiency of casing pipe running operation are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of oil drilling, in particular to a casing lowering auxiliary tool used for oil drilling. Background Art

[0002] In oil drilling operations, casing running is one of the key links. Its core goal is to lower the casing string (consisting of multiple casing pipes connected together) into the wellbore to reinforce the well wall, isolate the formation fluid, and provide a foundation for subsequent cementing and completion operations.

[0003] Under existing drilling technology, centralizers are typically used to maintain concentricity between the casing and the wellbore during casing lowering. During operation, the casing is rotated to utilize its dynamic adjustment capabilities, or the position of the centralizer is finely adjusted to prevent the casing from contacting the wellbore wall. However, the casing lowering tools used during this process, such as positioners and centralizers, must closely adhere to the casing surface to perform positioning tasks, relying on purely mechanical contact to achieve precise positioning. However, this close contact method has significant drawbacks: it subjects the casing to considerable friction during operation. This constant friction continuously scrapes the casing surface, causing wear. Once the casing wears, its previously intact protective layer is destroyed, exposing the metal substrate to the complex and harsh downhole environment. This significantly accelerates the rate of corrosion and causes premature fatigue failure, significantly reducing the expected service life of the casing and posing a threat to the long-term stability of the entire drilling project. Therefore, those skilled in the art provide a casing running auxiliary tool for oil drilling to solve the problems raised in the above background technology. Utility Model Content

[0004] The purpose of the present utility model is to provide a casing running auxiliary tool for oil drilling, so as to solve the problems raised in the above background technology.

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

[0006] A casing running auxiliary tool for oil drilling, comprising:

[0007] Two support frames, each of which is connected to a support ring via a lifting mechanism, a servo electric cylinder is installed on the support ring, the servo electric cylinder is connected to a support plate via a buffer assembly, and limit plates are fixed at both ends of the support plate, and a pulley is connected to the limit plate via a clamping assembly;

[0008] The engaging assembly includes a engaging plate and a triangular engaging block. The pulley is rotatably connected to the connecting plate. The triangular engaging block is fixedly arranged on the engaging plate. A connecting groove is provided on the limiting plate. The engaging plate is fixedly connected in the connecting groove. A engaging groove is provided on the connecting plate. The engaging plate passes through the engaging groove. The triangular engaging block is engaged with the connecting plate.

[0009] Preferably, the lifting mechanism includes a servo motor, a threaded rod and a moving block, the moving block is fixedly connected to the support ring, the threaded rod is rotatably connected to the support frame, the moving block is threadedly connected to the threaded rod, the servo motor is installed on the support frame, and the output end of the servo motor is connected to the extension end of the threaded rod passing through the support frame.

[0010] Preferably, an L-shaped plate is fixedly mounted on the support frame, and the servo motor is fixedly mounted on the L-shaped plate.

[0011] Preferably, a fixing plate is fixed on the support frame, and a mounting threaded hole is opened on the fixing plate.

[0012] Preferably, the output end of the servo electric cylinder is provided with a mounting plate, and a pressure sensor is fixedly mounted on the mounting plate.

[0013] Preferably, the buffer assembly includes a support frame, a support rod, a damper and a buffer spring, one end of the support frame is connected to the end of the pressure sensor away from the mounting plate, the end of the support rod away from the support frame is connected to the support plate, the mounting plate and the support frame support are supported and installed with a telescopic rod, the buffer spring is sleeved on the outside of the damper, one end of the buffer spring and the damper is connected to the inner cavity of the support frame, and the other end of the buffer spring and the damper is connected to the support rod.

[0014] Preferably, a controller is fixedly mounted on the support frame, and the controller is electrically connected to the servo cylinder, the servo motor and the pressure sensor.

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

[0016] 1. The utility model can provide buffering when limiting the casing through the setting of the buffer component, thereby preventing the casing from being damaged due to excessive force. Moreover, through the setting of the pulley, the original sliding friction is converted into rolling friction, reducing the scratching and wear of the limiting plate on the casing surface, effectively extending the service life of the casing, and improving the quality and efficiency of the entire casing operation.

[0017] 2. The utility model is provided with a locking mechanism, so that the pulley can be disassembled and replaced when it is damaged, which effectively improves the maintenance efficiency of the equipment and ensures the continuity and stability of oil drilling operations. The pressure sensor can detect the clamping pressure of the limit. The pressure sensor can sense the pressure when it contacts the casing in real time and make a judgment based on the pressure threshold. If the pressure value exceeds a reasonable range, it means that the casing may be skewed, the surface is uneven, or the straightening force is too large. It ensures that the pressure on the casing is in a safe and reasonable range, and prevents the casing from being damaged due to excessive straightening. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural schematic diagram of a casing running auxiliary tool for oil drilling in an embodiment of the present application;

[0019] Figure 2 This is a schematic cross-sectional view of a casing running auxiliary tool for oil drilling in an embodiment of the present application;

[0020] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0021] Figure 4 for Figure 2 Enlarged view of point B in the middle.

[0022] In the figure: 1. Support frame; 2. Support ring; 3. Servo cylinder; 4. Support plate; 5. Limit plate; 6. Pulley; 7. Clamping plate; 8. Triangular clamping block; 9. Connecting plate; 10. Connecting groove; 11. Clamping groove; 12. Servo motor; 13. Threaded rod; 14. Moving block; 15. L-shaped plate; 16. Fixed plate; 17. Mounting threaded hole; 18. Mounting plate; 19. Pressure sensor; 20. Support frame; 21. Support rod; 22. Damper; 23. Buffer spring; 24. Telescopic rod; 25. Controller. DETAILED DESCRIPTION

[0023] 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.

[0024] See also Figures 1-4 , the utility model provides a technical solution:

[0025] A casing running auxiliary tool for oil drilling, comprising:

[0026] Two support frames 1, the two support frames 1 are connected to a support ring 2 through a lifting mechanism, the lifting mechanism includes a servo motor 12, a threaded rod 13 and a moving block 14, the moving block 14 is fixedly connected to the support ring 2, the threaded rod 13 is rotatably connected to the support frame 1, the moving block 14 is threadedly connected to the threaded rod 13, the servo motor 12 is installed on the support frame 1, and the output end of the servo motor 12 is connected to the extended end of the threaded rod 13 that passes through the support frame 1, an L-shaped plate 15 is fixedly installed on the support frame 1, the servo motor 12 is fixedly mounted on the L-shaped plate 15, and the L-shaped plate 15 facilitates the installation and support of the servo motor 12;

[0027] The controller 25 controls the operation of the servo motor 12, and the output end of the servo motor 12 drives the threaded rod 13 connected to it to rotate. Since the moving block 14 is fixedly connected to the support ring 2 and is threadedly connected to the threaded rod 13, when the threaded rod 13 rotates, the moving block 14 will perform vertical lifting and lowering movements along the threaded rod 13, thereby driving the support ring 2 to rise and fall synchronously; the operator accurately controls the rotation direction and number of turns of the servo motor 12 through the controller 25 according to the length of the casing to be lowered into the wellbore and the wellhead height, and adjusts the support ring 2 to a suitable height so that the casing can be smoothly introduced into the support ring 2.

[0028] Furthermore, a fixing plate 16 is fixed on the support frame 1, and a mounting threaded hole 17 is opened on the fixing plate 16. When the support frame 1 is installed and fixed, bolts are used to connect with the mounting threaded holes 17 to install the support frame 1 at the drilling side.

[0029] A servo electric cylinder 3 is installed on the support ring 2, and a mounting plate 18 is installed on the output end of the servo electric cylinder 3. A pressure sensor 19 is fixedly installed on the mounting plate 18. The servo electric cylinder 3 is connected to the support plate 4 through a buffer assembly. Limit plates 5 are fixed at both ends of the support plate 4. The limit plate 5 is connected to a pulley 6 through a clamping assembly. The buffer assembly includes a support frame 20, a support rod 21, a damper 22 and a buffer spring 23. One end of the support frame 20 is connected to the end of the pressure sensor 19 away from the mounting plate 18, and the end of the support rod 21 away from the support frame 20 is connected to the support plate 4. A telescopic rod 24 is supported and installed on the mounting plate 18 and the support frame 20. The buffer spring 23 is sleeved on the outside of the damper 22. One end of the buffer spring 23 and the damper 22 is connected to the inner cavity of the support frame 20, and the other end of the buffer spring 23 and the damper 22 is connected to the support rod 21;

[0030] After the sleeve passes through the support ring 2, the controller 25 drives the servo electric cylinder 3 to start, and the output end of the servo electric cylinder 3 extends outward, pushing the mounting plate 18 and the pressure sensor 19 thereon to approach the sleeve. When the pulley 6 on the limit plate 5 is in contact with the sleeve; the buffer assembly begins to work, and the support frame 20 moves with the mounting plate 18. Since the buffer spring 23 is sleeved on the outside of the damper 22, when the mounting plate 18 is subjected to the reaction force from the sleeve, the buffer spring 23 is compressed, and the damper 22 suppresses the excessive rebound of the buffer spring 23, thereby ensuring that a certain straightening force is applied to the sleeve while buffering the impact force caused by the shaking or unevenness of the sleeve, ensuring that the sleeve remains in the center position; when the sleeve is limited, the pressure sensor 19 senses the pressure it is subjected to when in contact with the sleeve in real time, and transmits the pressure data back to the controller 25. The controller 25 makes a judgment based on a preset pressure threshold. If the pressure value exceeds a reasonable range, it indicates that the casing may be skewed, the surface is uneven, or the straightening force is too large. At this time, the controller 25 automatically adjusts the output force of the servo cylinder 3 to optimize the straightening effect of the casing, ensuring that the pressure on the casing is within a safe and reasonable range, and preventing damage to the casing due to excessive straightening.

[0031] The pulley 6 is provided to convert the original sliding friction into rolling friction, thereby reducing the scratching and wear of the limit plate 5 on the casing surface, effectively extending the service life of the casing, and improving the quality and efficiency of the entire casing running operation.

[0032] Specifically, the locking assembly includes a locking plate 7 and a triangular locking block 8. The pulley 6 is rotatably connected to the connecting plate 9. The triangular locking block 8 is fixedly set on the locking plate 7. A connecting groove 10 is provided on the limit plate 5. The locking plate 7 is fixedly connected in the connecting groove 10. A locking groove 11 is provided on the connecting plate 9. The locking plate 7 passes through the locking groove 11, and the triangular locking block 8 is engaged with the connecting plate 9.

[0033] When the pulley 6 is disassembled, the engaging plate 7 is deformed by moving the engaging plate 7 due to its toughness, and then the pulley 6 is pulled to remove the triangular engaging block 8 from the engaging groove 11.

[0034] When the pulley 6 is installed, one end of the locking plate 7 passes through the locking groove 11, and the connecting plate 9 is in contact with the inclined surface of the triangular clamping block 8. Then the connecting plate 9 is pressed, the locking plate 7 is deformed, and the triangular clamping block 8 passes through the locking groove 11. The locking plate 7 drives the triangular clamping block 8 to engage with the connecting plate 9.

[0035] In the above embodiment, the controller 25 is fixedly mounted on the support frame 1 , and the controller 25 is electrically connected to the servo cylinder 3 , the servo motor 12 and the pressure sensor 19 .

[0036] 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 casing running auxiliary tool for oil drilling, characterized in that: include: Two support frames (1), the two support frames (1) are connected to support rings (2) via a lifting mechanism, a servo electric cylinder (3) is installed on the support ring (2), the servo electric cylinder (3) is connected to a support plate (4) via a buffer assembly, and limit plates (5) are fixedly provided at both ends of the support plate (4), and a pulley (6) is connected to the limit plate (5) via a locking assembly; The clamping assembly comprises a clamping plate (7) and a triangular clamping block (8); the pulley (6) is rotatably connected to the connecting plate (9); the triangular clamping block (8) is fixedly arranged on the clamping plate (7); a connecting groove (10) is provided on the limiting plate (5); the clamping plate (7) is fixedly connected in the connecting groove (10); a clamping groove (11) is provided on the connecting plate (9); the clamping plate (7) passes through the clamping groove (11); and the triangular clamping block (8) is clamped with the connecting plate (9).

2. The casing running auxiliary tool for oil drilling according to claim 1, characterized in that: The lifting mechanism comprises a servo motor (12), a threaded rod (13) and a moving block (14); the moving block (14) is fixedly connected to the support ring (2); the threaded rod (13) is rotatably connected to the support frame (1); the moving block (14) is threadedly connected to the threaded rod (13); the servo motor (12) is mounted on the support frame (1); and the output end of the servo motor (12) is connected to the extension end of the threaded rod (13) that passes through the support frame (1).

3. The casing running auxiliary tool for oil drilling according to claim 2, characterized in that: An L-shaped plate (15) is fixedly mounted on the support frame (1), and the servo motor (12) is fixedly mounted on the L-shaped plate (15).

4. The casing running auxiliary tool for oil drilling according to claim 1, characterized in that: A fixing plate (16) is fixedly provided on the support frame (1), and a mounting threaded hole (17) is provided on the fixing plate (16).

5. The casing running auxiliary tool for oil drilling according to claim 2, characterized in that: The output end of the servo electric cylinder (3) is provided with a mounting plate (18), and a pressure sensor (19) is fixedly mounted on the mounting plate (18).

6. The casing running auxiliary tool for oil drilling according to claim 5, characterized in that: The buffer assembly includes a support frame (20), a support rod (21), a damper (22) and a buffer spring (23), one end of the support frame (20) is connected to the end of the pressure sensor (19) away from the mounting plate (18), the end of the support rod (21) away from the support frame (20) is connected to the support plate (4), the mounting plate (18) and the support frame (20) support and install a telescopic rod (24), the buffer spring (23) is sleeved on the outside of the damper (22), one end of the buffer spring (23) and the damper (22) are connected to the inner cavity of the support frame (20), and the other end of the buffer spring (23) and the damper (22) are connected to the support rod (21).

7. The casing running auxiliary tool for oil drilling according to claim 6, characterized in that: A controller (25) is fixedly mounted on the support frame (1), and the controller (25) is electrically connected to the servo electric cylinder (3), the servo motor (12) and the pressure sensor (19).

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