A tube tongs device

Abstract

The present application relates to the technical field of oil field, in particular to a pipe wrench device, including support, setting on the support integrated wrench and drive assembly; the drive assembly can drive integrated wrench move in horizontal direction; the integrated wrench includes pipe wrench body, the pipe wrench body includes up and down floating connection main wrench and back wrench; the main wrench and back wrench are provided with the jaw; the main wrench includes fixed part and the rotating part in the fixed part, a pair of jaw plates are arranged on the rotating part, the jaw plate is located at the jaw, the jaw plate is detachably connected with the clamp block; the back wrench includes fixed part and the rotating part in the fixed part, a pair of tooth block clamp blocks are arranged on the rotating part, the tooth block clamp block is located at the jaw, and the tooth block clamp block is detachably connected with the tooth block.The integrated wrench is set on the support, and the integrated wrench is driven to move forward and backward by the drive assembly, so as to facilitate the make-up and breakout operation; the integrated wrench can replace the clamp block and tooth block, and can be suitable for pumping pipe and pumping rod.

Description

Technical Field

[0001] The invention relates to the technical field of oil fields, in particular to a pipe clamp device. Background Art

[0002] Well repair systems used in oilfield operations are used to repair oil, gas, and water wells. These include breaking out, positioning, cleaning, and moving and making up the tubing in the well. Pipe clamps are the primary tool for pulling and unloading tubing in oil and water wells. However, due to the different diameters of the sucker rod and the tubing, running the tubing and rod in the well typically requires two separate pipe clamps, one for each rod and tubing. This introduces operational inconvenience and increases equipment costs. Therefore, it is necessary to design a pipe clamp that can accommodate both the tubing and the rod. Summary of the Invention

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art and propose a pipe clamp device that can be applied to both pumping pipes and pumping rods, thereby reducing equipment costs.

[0004] The technical solution adopted by the present invention to solve the technical problem is:

[0005] A pipe clamp device includes a bracket, an integrated clamp mounted on the bracket, and a drive assembly; the drive assembly is capable of driving the integrated clamp to move horizontally to facilitate the make-up or break-out of a pumping pipe or a pumping rod. When the make-up or break-out is complete and the integrated clamp device is no longer needed, the integrated clamp is returned to its original position; the integrated clamp includes a pipe clamp body, which includes a main clamp and a backup clamp connected in an up-and-down manner; both the main clamp and the backup clamp are provided with jaws; the main clamp includes a fixed portion and a rotating portion located within the fixed portion; the rotating portion is provided with a pair of jaws located at the jaws, with clamps detachably connected to the jaws for clamping the pumping pipe or pumping rod; the backup clamp includes a fixed portion and a rotating portion located within the fixed portion; the rotating portion is provided with a pair of tooth blocks and clamps located at the jaws, with tooth blocks detachably connected to the tooth blocks for clamping the coupling. In the above technical solution, the pumping pipe or pumping rod is clamped by the jaws and clamps, and the coupling is clamped by the tooth blocks and clamps. The rotating section drives the jaw plate, which in turn rotates the pumping pipe or rod, to make or break the coupling. The rotating section also drives the tooth block, which in turn rotates the coupling, allowing for installation and removal of the coupling. When clamping pumping pipes and rods of different diameters, simply replace the clamp block and tooth block, eliminating the need for two sets of equipment. The same set of equipment can be used for both pipes and rods, significantly saving costs.

[0006] Furthermore, the bracket includes an upper bracket, a middle bracket, and a lower bracket; the upper bracket and the middle bracket, as well as the middle bracket and the lower bracket, are connected by slide rails; the drive assembly includes a motor, a gear, and a rack; the motor is fixed to the middle bracket, a gear is provided at the motor output end, and racks that mesh with the gear are provided at the bottom of the upper bracket and the top of the lower bracket; the integrated clamp is provided on the upper bracket. During operation, the motor is started, the middle bracket moves horizontally relative to the lower bracket, and the upper bracket moves in the same direction at twice the speed of the middle bracket, causing the integrated clamp on the upper bracket to move rapidly.

[0007] Furthermore, the main tongs is mounted on a spring top plate through a suspension arm, the two ends of the spring top plate respectively pass through two guide shafts, and a buffer spring is provided between the spring top plate and the bottom of the guide shaft; the tops of the two guide shafts are fixed on a mounting seat, and the mounting seat is connected to a lifting cylinder fixed on the upper bracket; the above structural arrangement not only realizes the installation of the integrated tongs on the upper bracket, but also ensures the smooth buckling or unclamping of the pumping pipe or pumping rod, and at the same time, plays a guiding role in the up and down movement of the main tongs.

[0008] Furthermore, a coupling clamping guide block is fixedly provided at the bottom of the backup clamp, and a clamping block is provided on the coupling clamping guide block for sliding back and forth. A bayonet is provided at the center of the clamping block, and the bayonet size is arranged in grades for clamping oil pumping pipes or sucker rods of different sizes.

[0009] Furthermore, the side of the clamping block facing away from the bayonet is connected to a baffle fixed on the coupling clamping guide block through a spring. Under the push of the spring, the clamping block is pushed toward the coupling to clamp oil pumping pipes or sucker rods of different sizes.

[0010] Furthermore, the main tongs are connected to the backup tongs via a telescopic rod, so that the main tongs can float up and down relative to the backup tongs, ensuring smooth make-up and break-out.

[0011] Furthermore, a wellhead straightening device is provided at the front side of the integrated clamp, and the wellhead straightening device includes a preliminary positioning mechanism and a precise positioning mechanism provided on the upper bracket, and the preliminary positioning mechanism is located directly above the precise positioning mechanism; the preliminary positioning mechanism includes two groups of axisymmetrically arranged straightening plates, and the straightening plates are connected to the straightening cylinder, and the straightening cylinder is provided on the upper bracket, and the corresponding straightening plates are driven by the straightening cylinder to make the two groups of straightening plates move toward each other, thereby realizing preliminary straightening of the oil pipe or sucker rod; the precise positioning mechanism includes two groups of axisymmetrically arranged straightening shells, and the outer sides of the straightening shells A splash-proof shell is provided, and the righting shell and the splash-proof shell are both connected to the splash-proof cylinder. The splash-proof cylinder is provided on the upper bracket. On the one hand, during the oil pipe buckling operation, the corresponding righting shell is driven by the splash-proof cylinder, so that the two groups of righting shells move towards each other, thereby realizing precise righting of the oil pipe or sucker rod; on the other hand, during the oil pipe buckling operation, the splash-proof shell is placed at the bottom of the oil pipe (the oil pipe located above the splash-proof shell) under the drive of the splash-proof cylinder, so that the liquid in the oil pipe is sprayed to the inside of the righting shell. The righting shell is used to narrow the liquid splashing range and has the effect of preventing the liquid from splashing outward.

[0012] Furthermore, a sucker rod centralizing plate is detachably connected to the top of the centralizing housing, and a V-shaped groove is provided inside the sucker rod centralizing plate. The provision of the sucker rod centralizing plate of the present invention can satisfy the need for centralizing sucker rods with smaller outer diameters without replacing the centralizing housing.

[0013] Furthermore, the splash-proof housing is a semi-cylinder at the bottom and a semi-conical body at the top. The inner diameter of the semi-conical body at the bottom is smaller than the inner diameter of the semi-conical body at the top and equal to the inner diameter of the semi-cylinder. This structural arrangement can provide better splash-proof function and also avoid affecting the installation of the sucker rod straightening plate.

[0014] Furthermore, the centralizing cylinder is mounted on the upper support via a centralizing cylinder base. The centralizing cylinder body is hingedly connected to the centralizing cylinder base, and the centralizing cylinder piston rod is hingedly connected to one side of a centralizing swing arm. One end of the centralizing swing arm is hingedly connected to the upper support, and the other end is fixedly mounted with a centralizing plate. Activating the centralizing cylinder drives the centralizing swing arm to rotate, causing the centralizing plate to initially centralize the oil pipe or sucker rod.

[0015] Technical effects of the present invention:

[0016] Compared with the prior art, the pipe clamp device of the present invention sets an integrated clamp on a bracket, and drives the integrated clamp to move back and forth through a driving assembly to facilitate make-up and break-out operations; the integrated clamp is provided with a jaw plate on the main clamp, and a clamping block is detachably provided on the jaw plate, and a tooth block is provided on the backup clamp, and a tooth block is detachably provided on the tooth block clamp. When clamping oil pumping pipes and oil pumping rods of different diameters, only the clamping block and the tooth block need to be replaced, and there is no need to set up two sets of pipe clamp equipment. It can be applicable to oil pumping pipes and oil pumping rods, which greatly saves costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of a pipe clamp device according to the present invention;

[0018] Figure 2 This is a front view of the pipe clamp device of the present invention;

[0019] Figure 3 This is a right side view of the pipe clamp device of the present invention;

[0020] Figure 4 Schematic diagram of the structure of the middle support and the lower support of the present invention;

[0021] Figure 5 This is a schematic diagram of the integrated pliers structure of the present invention;

[0022] Figure 6 This is a front view of the integrated pliers of the present invention;

[0023] Figure 7 This is a right side view of the integrated pliers of the present invention;

[0024] Figure 8 It is a schematic diagram of the rotating part and the rotating portion structure of the present invention;

[0025] Figure 9 This is a schematic diagram of the coupling clamping guide block, clamping block, spring and baffle structure of the present invention;

[0026] Figure 10 This is a schematic diagram of the jaw plate and clamping block structure of the present invention;

[0027] Figure 11 This is a schematic diagram of the tooth block clamp and tooth block structure of the present invention;

[0028] Figure 12 This is a structural schematic diagram of the wellhead righting device of the present invention;

[0029] Figure 13 This is a schematic diagram of the structure of the centralizing plate, centralizing cylinder, and centralizing swing arm of the present invention;

[0030] Figure 14 This is a schematic structural diagram of the splash-proof housing and the sucker rod centralizing plate of the present invention.

[0031] In the figure, 1. main pliers; 2. back pliers; 3. jaws; 4. clamping blocks; 5. tooth block clamping blocks; 6. tooth blocks; 7. coupling clamping guide blocks; 8. clamping blocks; 9. bayonet; 10. spring; 11. baffle; 12. telescopic rod; 13. motor 1; 14. motor 2; 15. jaw frame; 16. gear plate 1; 17. clamping block frame; 18. gear plate 2; 19. suspension arm; 20. upper bracket; 21. middle bracket; 22. lower bracket; 23. motor; 24. gear; 25. rack; 26. spring top plate; 27. guide shaft 1; 28. buffer spring; 29. ​​mounting seat; 30. lifting Lowering cylinder; 31. Slide plate for anti-swing support of pipe clamp; 32. Anti-swing support of pipe clamp; 33. Slide rail; 34. Righting cylinder seat; 35. Righting plate; 36. Righting cylinder; 37. Righting shell; 38. Anti-spray cylinder; 39. Anti-splash shell; 40. Righting plate for sucker rod; 41. V-groove 1; 42. Strip groove; 43. Guide shaft 2; 44. Righting swing arm; 45. V-groove 2; 101. Fixed part; 102. Rotating part; 201. Fixed part; 202. Rotating part; 301. Slotting; 121. Inner rod; 122. Outer rod; 391. Semi-cylinder; 392. Semi-cone. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the accompanying drawings.

[0033] Example 1:

[0034] like Figure 1 As shown, the present embodiment involves a pipe clamp device, comprising a bracket, an integrated clamp arranged on the bracket, a wellhead straightening device and a drive assembly; the wellhead straightening device is arranged on the front side of the integrated clamp and is used to straighten the pumping pipe or pumping rod; the drive assembly can drive the integrated clamp and the wellhead straightening device to move in the horizontal direction so as to make or break the pumping pipe or pumping rod, and when the make-up or break-out is completed and the integrated clamp device is no longer needed, the integrated clamp is returned to its original position.

[0035] like Figures 1-3 As shown, the support includes an upper support 20 , a middle support 21 and a lower support 22 ; the upper support 20 and the middle support 21 , as well as the middle support 21 and the lower support 22 are connected via slide rails 33 .

[0036] like Figure 1 、 3As shown in Figures 4 and 5, the drive assembly includes a motor 23, a gear 24, and a rack 25. The motor 23 is fixed to the middle bracket 21, with the gear 24 provided at the output end of the motor 23. Racks 25 meshing with the gear 24 are provided at the bottom of the upper bracket 20 and the top of the lower bracket 22. The integrated clamp is mounted on the upper bracket 20. During operation, the motor 23 is started, the middle bracket 21 moves horizontally relative to the lower bracket 22, and the upper bracket 20 moves in the same direction at twice the speed of the middle bracket 21, causing the integrated clamp on the upper bracket 20 to move rapidly.

[0037] like Figure 5 and 6 As shown, the integrated pliers include a pipe pliers body comprising a main plier 1 and a backup plier 2, which are connected in a vertically floating manner. Both the main plier 1 and the backup plier 2 are provided with jaws. The main plier 1 is also provided with a suspension arm 19, which is mounted on a spring top plate 26 via the suspension arm 19. The ends of the spring top plate 26 extend through two guide shafts 27, respectively. A buffer spring 28 is disposed between the spring top plate 26 and the bottom of the guide shafts 27. The tops of the two guide shafts 27 are fixed to a mounting base 29, which is connected to a lifting cylinder 30 fixed to an upper support 20. This structural arrangement not only allows the integrated pliers to be mounted on the upper support 20, but also ensures smooth make-up and break-out of the pumping pipe or rod, while also guiding the vertical movement of the main plier 1. One side of the main plier 1 is connected to a pipe plier anti-swing support 32 mounted on the upper support 20 via a pipe plier anti-swing support slide 31, enhancing the stability of the integrated pliers and providing guidance.

[0038] like Figure 5 and 6 As shown, the main tongs 1 include a fixed portion 101 and a rotating portion 102 located within the fixed portion 101. The rotating portion 102 is provided with a pair of jaws 3 located at the jaw opening. Clamping blocks 4 are detachably connected to the jaws 3 for gripping the pumping pipe or rod. The rotating portion 102 drives the jaws 3 to rotate, thereby driving the pumping pipe or rod.

[0039] like Figure 5 and 6 As shown, the back clamp 2 includes a fixed portion 201 and a rotating portion 202 located in the fixed portion 201. A pair of tooth block clamps 5 are provided on the rotating portion 202. The tooth block clamps 5 are located at the jaws. A tooth block 6 (such as Figure 11 The tooth block 5 is driven to rotate by the rotating portion 202, thereby driving the coupling to rotate.

[0040] like Figure 5 and 9As shown, a coupling clamping guide block 7 is fixedly mounted at the bottom of the backup tong 2. A clamping block 8 is slidably mounted on the coupling clamping guide block 7. A slot 9 is provided at the center of the clamping block 8. The slots 9 are arranged in different sizes, such as two in the embodiment. The slots 9 gradually narrow from the outside to the inside, and are used to clamp pumping pipes or sucker rods of different sizes. Preferably, the side of the clamping block 8 facing away from the slot 9 is connected to a baffle 11 fixed to the coupling clamping guide block 7 via a spring 10. Driven by the spring 10, the clamping block 8 is pushed toward the coupling, causing a larger diameter pumping pipe to be clamped at the wider portion of the slot 9, while a smaller diameter sucker rod to be clamped at the narrower portion of the slot 9.

[0041] like Figure 5 and 7 As shown, the main tongs 1 and the backup tongs 2 are connected by a telescopic rod 12. Specifically, the telescopic rod 12 includes an inner rod 121 and an outer rod 122. The inner rod 121 is sleeved within the outer rod 122, and the bottom of the inner rod 121 is connected to the inner bottom wall of the outer rod 122 via a support spring (not shown in the figure). This enables the main tongs 1 to float up and down relative to the backup tongs 2, ensuring smooth make-up and break-out.

[0042] like Figure 7 and 8 As shown, the rotating portion 102 of the main tongs 1 is driven by a motor 13 fixed to the main tongs 1, while the rotating portion 202 of the backup tongs 2 is driven by a motor 2 14 fixed to the backup tongs 2. Specifically, the rotating portion 102 includes a jaw frame 15, with a pair of jaws 3 disposed oppositely on the jaw frame 15. A toothed disc 16 is disposed on the outer periphery of the jaw frame 15, meshing with a rotating gear (not shown) disposed at the output end of the motor 13, thereby enabling the motor 13 to drive the rotating portion 102. The rotating portion 202 includes a clamping block frame 17, with a pair of jaw blocks 5 disposed oppositely on the clamping block frame 17. A toothed disc 2 18 is disposed on the outer periphery of the clamping block frame 17, meshing with a rotating gear (not shown) disposed at the output end of the motor 2 14, thereby enabling the motor 2 14 to drive the rotating portion 202.

[0043] The clamping block 4 can be adjusted up and down on the jaw plate 3. As one embodiment, Figure 10 As shown, a vertical slot 301 is provided at the bottom of the jaw plate 3, and the clamping block 4 is fixed to the slot 301 by bolts. During installation, the position of the bolts in the slot 301 is adjusted and tightened to achieve height adjustment and fixation of the clamping block 4. As another embodiment, a plurality of through holes can be provided in the vertical direction of the lower end of the jaw plate 3, and bolts can be placed in the through holes at different heights to achieve height adjustment and fixation of the clamping block 4.

[0044] The rotating portion 102 of the main tong 1 is equipped with a drive device (not shown) for driving the jaws 3 left and right, allowing the jaws 3 to slide left and right relative to the jaw frame 15. The drive device is installed in a position that allows the jaws 3 to move left and right while also rotating with the rotating portion 102. The present invention does not restrict its installation location. Driven by the drive device, the two jaws 3 move toward each other, effectively gripping the pumping pipe or rod.

[0045] like Figure 12 As shown, the wellhead straightening device includes a preliminary positioning mechanism and a precise positioning mechanism.

[0046] like Figure 12 As shown, the preliminary positioning mechanism and the precise positioning mechanism are both arranged on the upper bracket 20, and the preliminary positioning mechanism is located directly above the precise positioning mechanism.

[0047] like Figure 12 and 13 As shown, the preliminary positioning mechanism includes two sets of centering cylinders 36 and two sets of axisymmetrically arranged centering plates 35. The centering plates 35 are provided with V-shaped grooves 45 (but not limited to V-shaped grooves; arc-shaped grooves are also possible) to facilitate clamping of the oil pipe or sucker rod. The centering cylinders 36 are oil cylinders and are mounted on the upper support 20 via a centering cylinder base 34. The cylinder bodies of the centering cylinders 36 are hinged to the centering cylinder base 34, and the piston rods of the centering cylinders 36 are hinged to one side of a centering swing arm 44. The centering swing arm 44 has one end hinged to the upper support 20 and the other end fixedly mounted with the centering plates 35. During operation, the centering cylinders 36 are activated, driving the centering swing arm 44 to rotate, thereby driving the corresponding centering plates 35, causing the two sets of centering plates 35 to move toward each other, achieving preliminary centering of the oil pipe or sucker rod.

[0048] like Figure 12 and 14 As shown, the precise positioning mechanism includes two sets of axisymmetrically arranged straightening housings 37. A splash-proof housing 39 is disposed outside the straightening housing 37. Both the straightening housing 37 and the splash-proof housing 39 are connected to a splash-proof cylinder 38, which is an oil cylinder and is mounted on the upper bracket 20. A sucker rod straightening plate 40 is detachably connected to the top of the straightening housing 37. A V-shaped groove 41 (but not limited to a V-shaped groove; an arc-shaped groove may also be provided) is disposed on the inner side of the straightening plate 40. When the sucker rod needs to be straightened, the straightening plate 40 can be mounted on the top of the straightening housing 37, making it suitable for straightening sucker rods with smaller outer diameters. A strip groove 42 is defined in the straightening plate 40. The straightening plate 40 is connected to the straightening housing 37 by bolts disposed in the strip groove 42. The provision of the strip groove 42 allows the sucker rod straightening plate 40 to move forward and backward along the length of the strip groove 42, providing more flexible adjustment to meet actual needs.

[0049] like Figure 14As shown, the splash-proof housing 39 comprises a semi-cylinder 391 at the bottom and a semi-conical body 392 at the top. The inner diameter of the bottom of the semi-conical body 392 is smaller than the inner diameter of the top of the semi-conical body 392 and is equal to the inner diameter of the semi-cylinder 391. During the oil pipe shackle operation, the two sets of splash-proof housings 39 are docked, with the upper forming the conical body and the lower forming the cylindrical body. After the shackle is completed, the oil pipe located above the splash-proof housing 39 sprays liquid into the splash-proof housing 39, reducing the splash range.

[0050] like Figure 12 As shown, the piston rod of the anti-splash cylinder 38 is fixedly connected to the outer side of the anti-splash housing 39, and the straightening housing 37 is bolted to the inner side of the anti-splash housing 39, which facilitates disassembly and maintenance. A second guide shaft 43 is also provided on both sides of the anti-splash cylinder 38. The second guide shaft 43 passes through the upper bracket 20 and is connected to the anti-splash housing 39 at one end. When the anti-splash cylinder 38 drives the anti-splash housing 39 to move forward and backward, the second guide shaft 43 serves as a guide and also makes the anti-splash housing 39 more stable.

[0051] Working Principle: The present invention suspends the integrated tongs from the upper support 20 of the workover rig via a suspension arm 19. A wellhead straightening device is installed at the front of the integrated tongs. Both the integrated tongs and the wellhead straightening device are suitable for both pumping tubing and pumping rods. During operation, a motor 23 drives the middle support 21 to move horizontally relative to the lower support 22. The upper support 20 moves toward the wellhead at twice the speed of the middle support 21. During tubing make-up, the wellhead straightening device's straightening cylinder 36 drives the corresponding straightening plates 35, forcing the two sets of straightening plates 35 toward each other, achieving initial straightening of the tubing. The blowout preventer cylinder 38 then drives the corresponding straightening housing 37, forcing the two sets of straightening housings 37 toward each other, achieving precise straightening of the tubing. Once the tubing is precisely straightened, the integrated tongs are moved forward to perform the make-up operation. This two-stage straightening operation ensures that the tubing is concentric with the wellhead, ensuring a smooth make-up operation.

[0052] The clamping block 8 of the integrated pliers clamps the pumping pipe or pumping rod. During this process, the spring 10 pushes the clamping block 8 forward. For larger pumping pipes, the clamping block 8 is clamped in the larger opening of the clamping slot 9. For smaller pumping rods, the spring 10 continues to push the clamping block 8 forward, causing the pumping rod to be clamped in the smaller opening of the clamping slot 9. After the pumping pipe or pumping rod is clamped, the tooth block 6 on the tooth block clamp 5 clamps the butt coupling, and the clamping block 4 on the jaw plate 3 clamps the pumping pipe or pumping rod. Then, the clamping block 4 is driven by the motor 13 to rotate and achieve the buckle-up or buckle-down action. When the coupling needs to be installed or removed, the clamping block 8 can clamp the pumping pipe or pumping rod located below, and the tooth block 6 on the tooth block clamp 5 clamps the butt coupling. Driven by the motor 2 14, the coupling is driven to rotate, thereby achieving the installation or removal of the coupling.

[0053] In this embodiment, when the oil pipe is broken off, the anti-spray cylinder 38 is started, and the anti-spray cylinder 38 drives the two sets of anti-splash shells 39 to dock. After docking, they are placed at the bottom of the oil pipe (the oil pipe located above the anti-splash shell 39). The liquid in the oil pipe is sprayed to the inside of the righting shell 37, which reduces the liquid splashing range and can prevent the liquid from splashing outward.

[0054] The above-mentioned specific embodiments are only specific cases of the present invention. The patent protection scope of the present invention includes but is not limited to the above-mentioned specific embodiments. Any appropriate changes or modifications made to them by ordinary technicians in the relevant technical field that comply with the claims of the present invention shall fall within the patent protection scope of the present invention.

Claims

1. A pipe clamp device comprising a bracket, an integrated clamp mounted on the bracket, and a drive assembly; characterized in that: The driving assembly can drive the integrated pliers to move in the horizontal direction; the integrated pliers include a pipe pliers body, the pipe pliers body includes a main pliers (1) and a backup pliers (2) connected in an upper and lower floating manner; jaws are provided on both the main pliers (1) and the backup pliers (2); the main pliers (1) include a fixed portion (101) and a rotating portion (102) located in the fixed portion (101); a pair of jaw plates (3) are provided on the rotating portion (102); the jaw plates (3) are located at the jaws; a clamping block (4) is detachably connected to the jaw plates (3) for clamping a pumping pipe or a pumping rod; the backup pliers (2) include a fixed portion (201) and a rotating portion (202) located in the fixed portion (201); a pair of tooth block clamping blocks (5) are provided on the rotating portion (202); the tooth block clamping blocks (5) are located at the jaws; a tooth block (6) is detachably connected to the tooth block clamping blocks (5) for clamping a coupling; A coupling clamping guide block (7) is fixedly provided at the bottom of the back clamp (2), a clamping block (8) is slidably provided on the coupling clamping guide block (7), a bayonet (9) is provided at the center of the clamping block (8), and the bayonet (9) is arranged in grades of size; the side of the clamping block (8) facing away from the bayonet (9) is connected to a baffle (11) fixed on the coupling clamping guide block (7) via a spring (10); The support comprises an upper support (20), a middle support (21) and a lower support (22); A wellhead straightening device is provided at the front side of the integrated clamp, and the wellhead straightening device includes a precise positioning mechanism provided on the upper bracket (20); the precise positioning mechanism includes two groups of axisymmetrically arranged straightening shells (37), and an anti-splashing shell (39) is provided outside the straightening shell (37). The straightening shell (37) and the anti-splashing shell (39) are both connected to an anti-splashing cylinder (38), and the anti-splashing cylinder (38) is provided on the upper bracket (20).

2. The pipe clamp device according to claim 1, characterized in that: The upper support (20) and the middle support (21), as well as the middle support (21) and the lower support (22) are connected via a slide rail (33); the driving assembly comprises a motor (23), a gear (24) and a rack (25); the motor (23) is fixed to the middle support (21), the output end of the motor (23) is provided with a gear (24), and the bottom of the upper support (20) and the top of the lower support (22) are both provided with a rack (25) meshing with the gear (24); the integrated clamp is provided on the upper support (20).

3. The pipe clamp device according to claim 1, characterized in that: The main clamp (1) is mounted on a spring top plate (26) via a suspension arm (19), and both ends of the spring top plate (26) respectively pass through two guide shafts (27). A buffer spring (28) is provided between the spring top plate (26) and the bottom of the guide shaft (27). The tops of the two guide shafts (27) are fixed on a mounting seat (29), and the mounting seat (29) is connected to a lifting cylinder (30) fixed on an upper bracket (20).

4. The pipe clamp device according to claim 1, characterized in that: The main clamp (1) and the backup clamp (2) are connected via a telescopic rod (12).

5. The pipe clamp device according to any one of claims 2 to 4, characterized in that: The wellhead straightening device includes a preliminary positioning mechanism arranged on the upper support (20), and the preliminary positioning mechanism is located directly above the precise positioning mechanism; the preliminary positioning mechanism includes two sets of axisymmetric straightening plates (35), and the straightening plates (35) are connected to the straightening cylinders (36). The straightening cylinders (36) are arranged on the upper support (20), and the corresponding straightening plates (35) are driven by the straightening cylinders (36).

6. The pipe clamp device according to claim 5, characterized in that: The top of the straightening shell (37) is detachably connected to a sucker rod straightening plate (40), and a V-shaped groove (41) is provided on the inner side of the sucker rod straightening plate (40).

7. The pipe clamp device according to claim 5, characterized in that: The splash-proof housing (39) has a semi-cylinder (391) at the bottom and a semi-cone (392) at the top. The inner diameter of the bottom of the semi-cone (392) is smaller than the inner diameter of the top of the semi-cone (392) and is equal to the inner diameter of the semi-cylinder (391).

8. The pipe clamp device according to claim 5, characterized in that: The straightening cylinder (36) is mounted on the upper support (20) via the straightening cylinder seat (34), the cylinder body of the straightening cylinder (36) is hinged to the straightening cylinder seat (34), the piston rod of the straightening cylinder (36) is hinged to one side of the straightening swing arm (44), one end of the straightening swing arm (44) is hinged to the upper support (20), and the other end is fixedly mounted with the straightening plate (35).

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