A hydraulic tong capable of mounting and dismounting oil pipe and sucker rod

Abstract

The utility model relates to oilfield equipment field discloses a hydraulic tong of can be on and off oil pipe and pumping rod, including main tong, back tong, hydraulic tong installation frame, main tong left lifting hydraulic cylinder, main tong right lifting hydraulic cylinder, main tong left guide buffer subassembly, main tong right guide buffer subassembly and main tong suspension crossbeam, hydraulic tong installation frame is equipped with fixed part, main tong left guide buffer subassembly includes left guide bar and left spring, main tong right guide buffer subassembly includes right guide bar and right spring, main tong is hoisted in the middle part of main tong suspension crossbeam through support, the piston rod end of main tong left lifting hydraulic cylinder is connected left guide bar through left transverse plate, the piston rod end of main tong right lifting hydraulic cylinder is connected right guide bar through right transverse plate, the utility model discloses reasonable structure layout makes hydraulic tong to satisfy oil pipe on and off buckle operation and can realize pumping rod on and off buckle operation, automatic switching, guarantee good security and stability simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of oilfield equipment, specifically to a hydraulic clamp that can load and unload oil pipes and sucker rods. Background Technology

[0002] In oilfield operations, the sucker rod, as the core component connecting the surface pumping unit and the downhole pump, has a relatively small height dimension at the connection point between its lower section and the lower section of the sucker rod compared to the tubing coupling. Ordinary tubing hydraulic clamps have a large back clamp distance, which cannot meet the requirements for the sucker rod's coupling distance. Traditionally, sucker rod coupling is often done manually. Current automated operations only address the automatic coupling of the tubing. Due to the significant difference in structural dimensions between the sucker rod and the tubing, the space for coupling the tubing far exceeds the coupling distance of the sucker rod. Therefore, sucker rod coupling is mostly done manually. Even with automated coupling equipment, there are still shortcomings in terms of operational safety and stability. For example, although a pipe wrench device disclosed in patent CN115949355B is applicable to the operation of sucker pipe and sucker rod, the hydraulic wrench is supported by guide shafts on both sides and buffer springs. However, the guide shafts are connected to the mounting bases suspended on them, which means they are in a suspended state. When the load is transferred to the guide shafts during the operation of the hydraulic wrench, the torque is large, and the guide shafts are easily deformed by the torsion. In addition, the lifting hydraulic cylinder is not equipped with a mechanical lock, so the lifting hydraulic cylinder is always under force, especially when the hydraulic cylinder is engaged or disengaged, it will also bear torque. Therefore, the service life of the lifting hydraulic cylinder is greatly reduced.

[0003] Therefore, designing a hydraulic clamp that can adapt to automated tubing operations, automatically switch between sucker rod loading and unloading modes, and also has good safety and stability is a crucial technical issue. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a hydraulic clamp that can connect and disconnect oil pipes and sucker rods, the technical solution of which is as follows:

[0005] A hydraulic clamp for attaching and detaching oil pipes and sucker rods includes a main clamp and a back clamp, and further includes a hydraulic clamp mounting frame, a left lifting hydraulic cylinder for the main clamp, a right lifting hydraulic cylinder for the main clamp, a left guide buffer assembly for the main clamp, a right guide buffer assembly for the main clamp, and a main clamp suspension beam. The hydraulic clamp mounting frame has upper left, lower left, upper right, and lower right fixing components, and its inner sides are respectively provided with upper left, lower left, upper right, and lower right guide rings. The left guide buffer assembly for the main clamp includes a left guide rod and a fitted left spring; the upper part of the left guide rod passes through the upper left guide ring, and the lower part passes through the lower left guide ring. The right guide buffer assembly for the main clamp includes a right guide rod and a fitted right spring; the upper part of the right guide rod passes through the upper right guide ring, and the lower part passes through the lower right guide ring. Guide ring; the two ends of the main clamp suspension beam are respectively fitted onto the upper parts of the left and right guide rods and are located above the left and right springs. The main clamp is suspended in the middle of the main clamp suspension beam by a bracket; the cylinder end of the left lifting hydraulic cylinder of the main clamp is connected to the upper left fixing component, and the piston rod end is connected to the left guide rod through the left horizontal plate and is located below the left spring; the cylinder end of the right lifting hydraulic cylinder of the main clamp is connected to the upper right fixing component, and the piston rod end is connected to the right guide rod through the right horizontal plate and is located below the right spring; the back clamp is fixed to the hydraulic clamp mounting frame and is located directly below the main clamp; the left horizontal plate and the lower left fixing component are provided with corresponding left pin holes for installing the left limit pin shaft; the right horizontal plate and the lower right fixing component are provided with corresponding right pin holes for installing the right limit pin shaft.

[0006] Further optimization involves providing a vertical support rod for the hydraulic clamp mounting frame, with a connecting ring fitted onto the support rod on the side of the main clamp.

[0007] Further optimization involves the back clamp comprising a housing, a jaw seat, jaws, and two symmetrically distributed movable hydraulic cylinders. The jaw seat and jaws mounted on the housing clamp the oil pipe or sucker rod under the drive of the two movable hydraulic cylinders.

[0008] Further optimization involves making the movable hydraulic cylinder a self-locking hydraulic cylinder.

[0009] Compared with the prior art, the present invention mainly has the following beneficial technical effects:

[0010] 1. The present invention has a reasonable structural layout, which enables the hydraulic clamp to not only meet the requirements of oil pipe uncoupling operations but also the requirements of sucker rod uncoupling operations, and can automatically switch between them.

[0011] 2. This utility model uses a limiting pin to mechanically lock the two main clamp lifting hydraulic cylinders, protecting them from external forces and extending their service life. The guide rods on both sides of the hydraulic clamp are supported by brackets at the top, middle, and bottom to prevent them from being easily deformed by twisting, which greatly improves the safety and stability of the hydraulic clamp.

[0012] 4. The back clamp of this utility model adopts a clamping structure, which can meet the clamping needs of various types of oil pipes and sucker rods by changing the jaw plates. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structural layout of this utility model;

[0014] Figure 2 for Figure 1 A schematic diagram of the AA side view;

[0015] Figure 3 for Figure 1 Schematic diagram of the cross section of BB;

[0016] In the diagram: 1-Hydraulic clamp mounting frame, 2-Left lifting hydraulic cylinder of main clamp, 3-Upper left guide ring, 4-Left guide rod, 5-Left spring, 6-Suspension beam of main clamp, 7-Bracket, 8-Main clamp, 9-Upper right guide ring, 10-Right guide rod, 11-Right spring, 12-Right lifting hydraulic cylinder of main clamp, 13-Right horizontal plate, 14-Right pin hole, 15-Lower right fixing component, 16-Lower right guide ring, 17-Back clamp, 18-Lower left guide ring, 19-Left pin hole, 20-Lower left fixing component, 21-Left horizontal plate, 22-Upper left fixing component, 23-Upper right fixing component, 24-Support rod, 25-Connecting ring, 26-Housing, 27-Grip seat, 28-Jaw jaws, 29-Moving hydraulic cylinder. Detailed Implementation

[0017] The present invention will now be described in detail with reference to specific embodiments and accompanying drawings. Example 1

[0018] See Figure 1 , Figure 2 and Figure 3A hydraulic clamp capable of attaching and detaching oil pipes and sucker rods includes a main clamp 8 and a back clamp 17, and also includes a hydraulic clamp mounting frame 1, a main clamp left lifting hydraulic cylinder 2, a main clamp right lifting hydraulic cylinder 12, a main clamp left guide buffer assembly, a main clamp right guide buffer assembly, and a main clamp suspension beam 6; the hydraulic clamp mounting frame 1 is provided with an upper left fixing member 22, a lower left fixing member 20, an upper right fixing member 23, and a lower right fixing member 15, and its inner side is provided with an upper left guide ring 3, a lower left guide ring 18, an upper right guide ring 9, and a lower right guide ring 16 respectively; the main clamp left guide buffer assembly includes a left guide rod 4 and its fitted left spring 5, the upper part of the left guide rod 4 passes through the upper left guide ring 3, and the lower part passes through the lower left guide ring 18; the main clamp right guide buffer assembly includes a right guide rod 10 and its fitted left spring 5. The right spring 11 of the set and the upper part of the right guide rod 10 pass through the upper right guide ring 9 and the lower part passes through the lower right guide ring 16. The two ends of the main clamp suspension beam 6 are respectively fitted on the upper parts of the left guide rod 4 and the right guide rod 10 and are located above the left spring 5 and the right spring 11. The main clamp 8 is suspended in the middle of the main clamp suspension beam 6 by the bracket 7. The cylinder end of the left lifting hydraulic cylinder 2 of the main clamp is connected to the upper left fixing part 22, and the piston rod end is connected to the left guide rod 4 through the left horizontal plate 21 and is located below the left spring 5. The cylinder end of the right lifting hydraulic cylinder 12 of the main clamp is connected to the upper right fixing part 23, and the piston rod end is connected to the right guide rod 10 through the right horizontal plate 13 and is located below the right spring 11. The back clamp 17 is fixed to the hydraulic clamp mounting frame 1 and is located directly below the main clamp 8. The left horizontal plate 21 and the lower left fixing member 20 are provided with corresponding left pin holes 19 for installing the left limit pin; the right horizontal plate 13 and the lower right fixing member 15 are provided with corresponding right pin holes 14 for installing the right limit pin. The lifting hydraulic cylinder is mechanically locked by the limit pin, protecting it from external forces and extending its service life. Example 2

[0019] See Figure 1 , Figure 2 and Figure 3 A hydraulic clamp capable of attaching and detaching oil pipes and sucker rods, based on the technical solution described in Embodiment 1, wherein the hydraulic clamp mounting frame 1 is provided with a vertical support rod 24, and the main clamp 8 is provided with a connecting ring 25 fitted on the support rod 24 on its side to ensure the horizontality of the main clamp 8. Example 3

[0020] See Figure 1 , Figure 2 and Figure 3 A hydraulic clamp capable of attaching and detaching oil pipes and sucker rods, based on the technical solution described in Embodiment 1, comprises a back clamp 17 including a housing 26, a jaw seat 27, jaws 28, and two symmetrically distributed movable hydraulic cylinders 29. The jaw seat 27 and jaws 28, mounted on the housing 26, clamp the oil pipe or sucker rod under the drive of the two movable hydraulic cylinders 29. The movable hydraulic cylinders 29 are self-locking hydraulic cylinders to ensure that the clamped oil pipe or sucker rod does not loosen.

[0021] To enable those skilled in the art to better understand this utility model, its basic working principle and process are briefly described below:

[0022] During tubing connection and disconnection, the hydraulic tongs are moved to the center of the wellhead via a trolley. The back tongs 17 clamp the lower tubing coupling and remain stationary. The main tongs 8 clamp the upper tubing section for connection and disconnection. The main tongs 8 rises or falls during the connection and disconnection process, with the left spring 5 and right spring 11 ensuring smooth and unobstructed connection and disconnection. The back tongs 17 clamps the coupling using a clamping method. When using different tubing string models, interchangeability is achieved simply by changing the jaws 27 and jaws 28. During sucker rod connection and disconnection, the main tongs 8 is lowered to a position nearly flush with the back tongs 17 using the left and right lifting hydraulic cylinders 2 and 12. The back tongs 17 clamps the sucker rod at all four sides, while the main tongs 8 clamps the upper sucker rod for connection and disconnection. The main clamp suspension beam 6 is supported by the main left spring 5 and the right spring 11. The distance between the main clamp 8 and the back clamp 17 is maintained by the main clamp left lifting hydraulic cylinder 2 and the main clamp right lifting hydraulic cylinder 12. When switching between the oil pipe and the sucker rod, the main clamp left lifting hydraulic cylinder 2 and the main clamp right lifting hydraulic cylinder 12 extend, and the main clamp 8 falls, ensuring that the distance between the main clamp and the back clamp meets the distance for unloading the sucker rod. Then, the left limit pin is inserted into the left pin hole 19 and the right limit pin is inserted into the right pin hole 14. The mechanical limit is used to protect the main clamp left lifting hydraulic cylinder 2 and the main clamp right lifting hydraulic cylinder 12 from stress.

Claims

1. A hydraulic clamp for attaching and detaching oil pipes and sucker rods, comprising a main clamp and a back clamp, characterized in that, It also includes a hydraulic clamp mounting frame, a left lifting hydraulic cylinder for the main clamp, a right lifting hydraulic cylinder for the main clamp, a left guide buffer assembly for the main clamp, a right guide buffer assembly for the main clamp, and a main clamp suspension beam. The hydraulic clamp mounting frame has upper left, lower left, upper right, and lower right fixing components, with upper left, lower left, upper right, and lower right guide rings respectively located on its inner side. The left guide buffer assembly for the main clamp includes a left guide rod and its fitted left spring; the upper part of the left guide rod passes through the upper left guide ring, and the lower part passes through the lower left guide ring. The right guide buffer assembly for the main clamp includes a right guide rod and its fitted right spring; the upper part of the right guide rod passes through the upper right guide ring, and the lower part passes through the lower right guide ring. The main clamp suspension beam... The two ends of the clamp are respectively fitted onto the upper parts of the left and right guide rods and are located above the left and right springs. The main clamp is suspended in the middle of the main clamp suspension beam by a bracket. The cylinder end of the left lifting hydraulic cylinder of the main clamp is connected to the upper left fixing component, and the piston rod end is connected to the left guide rod through the left horizontal plate and is located below the left spring. The cylinder end of the right lifting hydraulic cylinder of the main clamp is connected to the upper right fixing component, and the piston rod end is connected to the right guide rod through the right horizontal plate and is located below the right spring. The back clamp is fixed to the hydraulic clamp mounting frame and is located directly below the main clamp. The left horizontal plate and the lower left fixing component are provided with corresponding left pin holes for installing the left limit pin shaft. The right horizontal plate and the lower right fixing component are provided with corresponding right pin holes for installing the right limit pin shaft.

2. The hydraulic clamp for attaching and detaching oil pipes and sucker rods according to claim 1, characterized in that, The hydraulic clamp mounting frame is equipped with a vertical support rod, and the main clamp has a connecting ring fitted onto the support rod on its side.

3. A hydraulic clamp for attaching and detaching oil pipes and sucker rods according to claim 1, characterized in that, The back clamp includes a housing, a jaw seat, jaws, and two symmetrically distributed movable hydraulic cylinders. The jaw seat and jaws mounted on the housing clamp the oil pipe or sucker rod under the drive of the two movable hydraulic cylinders.

4. A hydraulic clamp for attaching and detaching oil pipes and sucker rods according to claim 3, characterized in that, The movable hydraulic cylinder is a self-locking hydraulic cylinder.

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