Oil suction casing cutting tool for abandoned oil well

Abstract

The application provides a waste oil well oil suction casing cutting tool, which comprises a rack, the rack is arranged at the mouth of a waste oil well, and a through hole for the casing to pass through is formed in the rack; a pipe cutting assembly is assembled by an annular guide rail, an annular mounting support, a rotating mechanism and a feeding cutting mechanism, the annular mounting support is arranged at the through hole at the top of the rack, the annular guide rail is arranged on the annular mounting support, the rotating mechanism is connected with the annular guide rail, and the rotating mechanism rotates around the annular guide rail; the feeding cutting mechanism is arranged on the rotating mechanism, the feeding cutting mechanism is controlled to move towards the through hole, and the feeding cutting mechanism moves around the rotating mechanism to cut the casing in the through hole. The application can automatically complete the cutting operation of the casing, the cutting process does not need the participation of an operator, the cutting efficiency is higher than that of manual cutting, and the personal safety of the operator is effectively ensured.

Description

Technical Field

[0001] This application belongs to the field of oil suction casing retrieval and recovery technology, and particularly relates to a cutting tool for abandoned oil well oil suction casing. Background Technology

[0002] The treatment of suction casing in abandoned oil wells is a crucial step in well sealing operations. Currently, the most environmentally friendly method for treating suction casing in abandoned oil wells is retrieval and recovery. This involves using equipment to pull the suction casing out of the wellhead section by section, then cutting and recovering it. This method can completely remove potential sources of contamination (residual oil, scale, and deposits on the pipe wall) and metal pipes that may corrode and leak in the future, providing a clearer and more reliable wellbore for subsequent sealing operations such as running bridge plugs and injecting cement plugs.

[0003] After the suction casing is pulled out of the wellhead, it needs to be cut to facilitate subsequent casing retrieval. Currently, casing cutting is often done manually by an operator holding a cutting machine and moving it around the casing. However, this method is not only inefficient, but also poses certain safety risks to the operator during the cutting process.

[0004] To improve the efficiency of casing cutting and ensure the personal safety of operators, an automated cutting system is needed to complete the casing cutting operation. Utility Model Content

[0005] In view of this, this application aims to propose a cutting tool for the suction casing of abandoned oil wells to solve the problems of low efficiency and personnel safety risks of manual cutting operations.

[0006] To achieve the above objectives, the technical solution of this application is implemented as follows:

[0007] This application provides a tooling for cutting the suction casing of abandoned oil wells, including:

[0008] A frame is installed at the abandoned oil wellhead, and the frame has a through hole for the casing to pass through;

[0009] The pipe cutting assembly is composed of an annular guide rail, an annular mounting bracket, a rotating mechanism, and a feed cutting mechanism. The annular mounting bracket is located at a through hole at the top of the frame. The annular guide rail is mounted on the annular mounting bracket. The rotating mechanism is connected to the annular guide rail and rotates around the annular guide rail.

[0010] The feed cutting mechanism is mounted on the rotating mechanism. The feed cutting mechanism is controlled to move toward the through hole and moves around in coordination with the rotating mechanism to perform cutting operations on the sleeve inside the through hole.

[0011] Furthermore, the annular guide rail mounting base is fixed to the top end face of the frame by screws, and the annular guide rail is fixed to the top flange of the annular guide rail mounting base by screws.

[0012] Furthermore, the annular mounting bracket and the annular guide rail are provided with a through hole for the sleeve to pass through.

[0013] Furthermore, the rotating mechanism includes a hydraulic motor, a movable support, an output gear, and a rotating wheel. The hydraulic motor is mounted on the movable support, the output gear is assembled and connected to the output shaft of the hydraulic motor, and the output gear meshes with a gear provided on the annular guide rail. The rotating wheel is rotatably mounted on the movable support and cooperates with the annular guide rail.

[0014] Furthermore, there are multiple rotating wheels, each of which is a V-shaped wheel, with the rollers of the multiple V-shaped wheels embedded in the annular guide rail.

[0015] Furthermore, the feeding and cutting mechanism includes a feeding cylinder, a linear guide rail, and a cutting machine. The feeding cylinder is disposed on both side walls of the movable support. The fixed end of the cutting machine is assembled and connected to the piston rod end of the feeding cylinder. The linear guide rail is disposed on the top wall of the movable support. The top surface of the cutting machine is disposed on the slider of the linear guide rail, and the cutting blade of the cutting machine is disposed facing the through hole.

[0016] Compared with the prior art, the abandoned oil well suction casing cutting tool described in this application has the following advantages:

[0017] The tooling described in this application can automatically cut the casing pulled out of the wellhead. The cutting process does not require the participation of operators, and the cutting efficiency is higher than that of manual cutting. It facilitates the subsequent casing retrieval operation and effectively ensures the personal safety of operators. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0019] Figure 1 This is an overall sectional view of the frame and pipe-cutting assembly described in the embodiments of this application;

[0020] Figure 2 This is a cross-sectional view of the pipe assembly described in the embodiments of this application.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. Frame; 2. Pipe cutting assembly; 21. Circular guide rail; 22. Circular mounting bracket; 23. Rotating mechanism; 231. Hydraulic motor; 232. Moving bracket; 233. Output gear; 234. Rotating wheel; 24. Feed cutting mechanism; 241. Feed cylinder; 242. Linear guide rail; 243. Cutting machine; 3. Sleeve. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings.

[0024] It should be noted that, unless otherwise defined, the technical or scientific terms used in the embodiments of this application should have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," and similar terms used in the embodiments of this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word covers the element or object listed after the word and its equivalents, but does not exclude other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can refer to any connection.

[0025] This includes electrical connections, whether direct or indirect. Terms like "up," "down," "left," and "right" are used only to indicate relative positional relationships; these relative relationships may change if the absolute position of the object being described changes.

[0026] Please see Figure 1 and Figure 2 As shown, this embodiment provides a cutting tool for the suction casing of an abandoned oil well, including:

[0027] The frame 1 is installed at the abandoned oil wellhead, and the frame 1 has a through hole for the casing 3 to pass through.

[0028] The pipe cutting assembly 2 is composed of an annular guide rail 21, an annular mounting support 22, a rotating mechanism 23 and a feed cutting mechanism 24. The annular mounting support 22 is located at the through hole at the top of the frame 1. The annular guide rail 21 is mounted on the annular mounting support 22. The rotating mechanism 23 is connected to the annular guide rail 21 and rotates around the annular guide rail 21.

[0029] The feed cutting mechanism 24 is mounted on the rotating mechanism 23. The feed cutting mechanism 24 is controlled to move toward the through hole and moves around in coordination with the rotating mechanism 23 to perform cutting operations on the sleeve 3 inside the through hole.

[0030] In this embodiment, an abandoned oil well casing cutting tool can automatically cut the casing 3 pulled out of the wellhead. The cutting process does not require operator intervention, and the cutting efficiency is higher than that of manual cutting. This facilitates the subsequent recycling of the casing 3 and effectively ensures the personal safety of the operator.

[0031] In some implementations, such as Figure 2 As shown, the annular guide rail 21 mounting base is fixed to the top end face of the frame 1 by screws, and the annular guide rail 21 is fixed to the top flange of the annular guide rail 21 mounting base by screws. The annular mounting support 22 and the annular guide rail 21 are provided with a through hole for the sleeve 3 to pass through.

[0032] The rotating mechanism 23 includes a hydraulic motor 231, a movable support 232, an output gear 233, and rotating wheels 234. The hydraulic motor 231 is mounted on the movable support 232. The output gear 233 is assembled and connected to the output shaft of the hydraulic motor 231, and the output gear 233 meshes with the gear on the annular guide rail 21. Multiple rotating wheels 234 are rotatably mounted on the movable support 232. Each rotating wheel 234 is a V-shaped wheel. The rollers of the multiple V-shaped wheels are embedded in the annular guide rail 21 and move in cooperation with the annular guide rail 21.

[0033] The feed cutting mechanism 24 includes a feed cylinder 241, a linear guide rail 242, and a cutting machine 243. The feed cylinder 241 is mounted on both sides of the movable support 232. The fixed end of the cutting machine is assembled and connected to the piston rod end of the feed cylinder 241. The linear guide rail 242 is mounted on the top wall of the movable support 232. The top surface of the cutting machine is mounted on the slider of the linear guide rail 242, and the cutting blade of the cutting machine 243 is oriented towards the through hole.

[0034] Specifically, in this embodiment, the annular mounting bracket 22 in the pipe cutting assembly 2 is fixed to the top surface of the top platform by screws, the annular guide rail 21 is fixed to the top flange of the annular mounting bracket 22 by screws, the shafts of the four V-shaped wheels are inserted into the mounting holes of the movable bracket 232 and fixed to the movable bracket 232 by nuts; the rollers of the four V-shaped wheels are embedded in the annular guide rail 21, and the movable bracket 232 can move along the annular guide rail 21 through the cooperation of the V-shaped wheels and the annular guide rail 21.

[0035] The hydraulic motor 231 is fixed to the movable bracket 232 by screws. The output shaft of the hydraulic motor 231 is fitted into the center hole of the output gear 233 and fixed by a pin. The output gear 233 meshes with the gear on the annular guide rail 21. By driving the output shaft of the hydraulic motor 231 to rotate, the output gear 233 is driven to rotate. Due to the meshing relationship between the output gear 233 and the gear on the annular guide rail 21, the movable bracket 232 can be driven to move along the annular guide rail 21. The entire movement of the device in this application is driven by hydraulics, which meets the explosion-proof requirements.

[0036] In this embodiment, a rotating mechanism 23 and a feed cutting mechanism 24 work together to achieve the action of the cutting machine 243 cutting the sleeve 3. The two feed cylinders 241 in the feed cutting mechanism 24 are fixed to the two sides of the moving bracket 232 by screws, and the rod ends of the two feed cylinders 241 face the center. The top surface of the cutting machine 243 is fixed to the slider of the linear guide rail 242 by screws. The piston rod threads of the two feed cylinders 241 are fitted into the mounting holes on both sides of the cutting machine 243 and fixed to the rod ends of the feed cylinders 241 by nuts. Driving the piston rods of the feed cylinders 241 to extend can push the cutting machine 243 to move towards the center. With the rotation of the moving bracket 232, the blade of the cutting machine 243 can cut the sleeve in the center.

[0037] When implementing this solution using the tooling, the casing 3 inside the well is pulled out. By driving the hydraulic motor 231, the cutting machine 243 is driven to move around the exposed casing 3. In conjunction with the extension of the piston rod of the feed cylinder 241, the cutting machine 243 is driven to move towards the center. The blade inside the cutting machine 243 completely cuts off the casing 3. By repeating the above-mentioned pipe pulling and cutting operations, the casing 3 can be continuously pulled out from the wellhead, cut off and recovered.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

[0039] The embodiments of this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the embodiments of this application should be included within the protection scope of this application.

Claims

1. A cutting tool for the suction casing of an abandoned oil well, characterized in that, include: A frame is installed at the abandoned oil wellhead, and the frame has a through hole for the casing to pass through; The pipe cutting assembly is composed of an annular guide rail, an annular mounting bracket, a rotating mechanism, and a feed cutting mechanism. The annular mounting bracket is located at a through hole at the top of the frame. The annular guide rail is mounted on the annular mounting bracket. The rotating mechanism is connected to the annular guide rail and rotates around the annular guide rail. The feed cutting mechanism is mounted on the rotating mechanism. The feed cutting mechanism is controlled to move toward the through hole and moves around in coordination with the rotating mechanism to perform cutting operations on the sleeve inside the through hole.

2. The tooling for cutting the suction casing of an abandoned oil well according to claim 1, characterized in that: The annular guide rail mounting base is fixed to the top end face of the frame with screws, and the annular guide rail is fixed to the top flange of the annular guide rail mounting base with screws.

3. The tooling for cutting the suction casing of an abandoned oil well according to claim 1, characterized in that: The annular mounting bracket and the annular guide rail are provided with a through hole for the sleeve to pass through.

4. The tooling for cutting the suction casing of an abandoned oil well according to claim 1, characterized in that: The rotating mechanism includes a hydraulic motor, a movable support, an output gear, and a rotating wheel. The hydraulic motor is mounted on the movable support. The output gear is assembled and connected to the output shaft of the hydraulic motor and meshes with a gear on the annular guide rail. The rotating wheel is rotatably mounted on the movable support and cooperates with the annular guide rail.

5. The tooling for cutting the suction casing of an abandoned oil well according to claim 4, characterized in that: The number of rotating wheels is multiple, and each rotating wheel is a V-shaped wheel. The rollers of the multiple V-shaped wheels are embedded in the annular guide rail.

6. The tooling for cutting the suction casing of an abandoned oil well according to claim 4, characterized in that: The feeding and cutting mechanism includes a feeding cylinder, a linear guide rail, and a cutting machine. The feeding cylinder is mounted on both side walls of the movable support. The fixed end of the cutting machine is assembled and connected to the piston rod end of the feeding cylinder. The linear guide rail is mounted on the top wall of the movable support. The top surface of the cutting machine is mounted on the slider of the linear guide rail, and the cutting blade of the cutting machine is positioned facing the through hole.

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