A tubing thread cleaning and repair device

Abstract

This invention belongs to the field of thread repair technology and discloses a device for cleaning and repairing oil pipe threads. It includes a rotating handle, a stop block, a cylinder, alloy repair teeth, a camshaft, and fixing screws. The camshaft consists of an elliptical cylinder and a semi-circular ring cylinder. The outer diameter of the elliptical cylinder matches the inner diameter of the semi-circular ring cylinder. The rotating handle and the elliptical cylinder part of the camshaft are integrated. The stop block is fitted onto the rotating handle and connected to the cylinder. Alloy repair teeth are evenly distributed on the outside of the cylinder. The cylinder is fixed and fitted onto the camshaft by the fixing screws. This effectively solves the problem of oil pipe threads wearing and becoming dirty during oil pipe lowering operations. It greatly improves the safety and effectiveness of lowering and raising operations, while also increasing work efficiency.

Description

Technical Field

[0001] This invention belongs to the field of thread repair technology, specifically relating to a device for cleaning and repairing oil pipe threads. Background Technology

[0002] During prolonged and frequent use, the threads of oil pipes experience repeated wear and tear, leading to thread damage. Repeated removal and removal contaminates the threads with oil, dirt, and sand; if not properly cleaned, this further exacerbates the damage. Currently, there are no specialized tools available, and only wire brushes and cotton yarn are used for simple cleaning. Minor damage to the oil pipe threads cannot be repaired due to tool limitations. This results in a large workload, long construction periods, reduced work efficiency, and increased construction costs. Summary of the Invention

[0003] To overcome the shortcomings of existing cleaning and repair devices in cleaning and repairing tubing threads, this invention provides a tubing thread cleaning and repair device that can repair slightly damaged tubing threads, clean unclean tubing threads, improve the reusability of tubing, increase the efficiency of well workover operations, reduce the cost of well workover operations, and improve the quality of well workover operations.

[0004] The above-mentioned objective of the present invention is achieved through the following technical solution: an oil pipe thread cleaning and repair device, comprising a rotating handle, a stop block, a cylinder, alloy repair teeth, a camshaft, and fixing screws. The camshaft is divided into two parts: an elliptical cylinder and a semi-circular ring cylinder. The outer diameter of the elliptical cylinder and the inner diameter of the semi-circular ring cylinder are matched. The rotating handle and the elliptical cylinder part of the camshaft are integrally structured. The stop block is sleeved on the rotating handle and connected to the cylinder. Alloy repair teeth are evenly distributed on the outside of the cylinder. The cylinder is connected and fixed by fixing screws and sleeved on the camshaft.

[0005] In a further preferred embodiment of the present invention, the cylinder is provided as two longitudinally symmetrical cylinders, each of which is connected and fixed by two fixing screws and sleeved on the camshaft.

[0006] In a further preferred embodiment of the present invention, the elliptical cylindrical portion of the camshaft has a major diameter of 70 mm, a minor diameter of 60 mm, and a length of 100 mm.

[0007] In a further preferred embodiment of the present invention, the cylindrical body is generally frustum-shaped and has a groove that matches the outer diameter of the elliptical cylindrical portion of the camshaft.

[0008] In a further preferred embodiment of the present invention, the stop block is threadedly connected to the cylinder body.

[0009] In a further preferred embodiment of the present invention, the diameter of the rotating handle is 10-15 mm.

[0010] In a further preferred embodiment of the present invention, the cylinder has a length of 200 mm, an outer diameter of 80 mm, a major inner diameter of 70 mm, and a minor inner diameter of 60 mm.

[0011] The advantages of this invention compared to existing technologies are: the tubing thread cleaning and repair device has a novel structure and reliable performance, making it an indispensable tool in tubing runs. The use of this device effectively solves the problem of worn and easily soiled tubing threads during tubing runs. It greatly improves the safety and effectiveness of tripping operations, while also increasing work efficiency. It is applicable to all current well workover operations, and with the increasing frequency of workovers, the usage time and number of times tubing is used are constantly increasing, leading to more and more instances of thread damage. This trend will only continue to grow. The tubing thread cleaning and repair device is a product adapted to the current production environment and is currently in its golden age of development, possessing enormous market potential. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the oil pipe thread cleaning and repair device of the present invention;

[0014] Figure 2 This is a cross-sectional view (AA) of the oil pipe thread cleaning and repair device of the present invention.

[0015] The diagram shows: 1. Rotary handle; 2. Stop; 3. Cylinder body; 4. Alloy repair teeth; 5. Camshaft; 6. Fixing screw. Detailed Implementation

[0016] To enable those skilled in the art to better understand the technical solutions of this invention, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this invention.

[0017] It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or may be interposed with another element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or may be interposed with another element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0019] Example 1

[0020] A device for cleaning and repairing oil pipe threads

[0021] The device includes a rotating handle 1, a stop block 2, a cylindrical body 3, alloy repair teeth 4, a camshaft 5, and fixing screws 6. The camshaft 5 is divided into two parts: an elliptical cylinder and a semi-circular ring cylinder. The outer diameter of the elliptical cylinder matches the inner diameter of the semi-circular ring cylinder. The rotating handle 1 and the elliptical cylinder part of the camshaft 5 are an integral structure. The stop block 2 is fitted onto the rotating handle 1, and the bottom of the stop block 2 is connected to the top of the elliptical cylinder part of the camshaft 5. The stop block 2 is threadedly connected to the cylindrical body 3. There are two longitudinally symmetrical cylindrical bodies 3, each connected and fixed by two fixing screws 6 and fitted onto the camshaft 5. Alloy repair teeth 4 are evenly distributed on the outside of the cylindrical body 3. The elliptical cylinder part of the camshaft 5 has a major diameter of 70mm, a minor diameter of 60mm, and a length of 100mm. The cylindrical body 3 is frustum-shaped and has a groove that matches the outer diameter of the elliptical cylinder part of the camshaft 5. The cylindrical body 3 has a length of 200mm, an outer diameter of 80mm, a major inner diameter of 70mm, and a minor inner diameter of 60mm. The rotating handle 1 has a diameter of 10mm.

[0022] When the oil pipe thread cleaning and repair device is in operation (i.e., when repairing or cleaning oil pipe threads), the working mode is as follows: Match the camshaft 5 of the oil pipe thread cleaning and repair device with the elliptical space inside the cylinder 3 to minimize the tool's outer diameter. Then, place the oil pipe thread cleaning and repair device into the oil pipe thread, ensuring the alloy repair teeth 4 are close to the thread. Rotating the handle causes the camshaft 5 to shift relative to the elliptical space inside the cylinder 3 due to friction between the alloy repair teeth 4 and the oil pipe thread. This increases the tool's outer diameter, allowing the alloy repair teeth 4 to engage with the damaged thread. Continue rotating the handle to gradually repair the thread while simultaneously cleaning debris from between the threads. After cleaning and repair, reverse the rotation of the tool to remove it.

[0023] Example 2

[0024] A device for cleaning and repairing oil pipe threads

[0025] The system includes a rotating handle 1, a stop block 2, a cylindrical body 3, alloy repair teeth 4, a camshaft 5, and fixing screws 6. The camshaft 5 is divided into two parts: an elliptical cylinder and a semi-circular ring cylinder. The outer diameter of the elliptical cylinder matches the inner diameter of the semi-circular ring cylinder. The rotating handle 1 and the elliptical cylinder part of the camshaft 5 are an integral structure. The stop block 2 is fitted onto the rotating handle 1, and the bottom of the stop block 2 is connected to the top of the elliptical cylinder part of the camshaft 5. The stop block 2 is threadedly connected to the cylindrical body 3. There are two longitudinally symmetrical cylindrical bodies 3, each connected and fixed by two fixing screws 6 and fitted onto the camshaft 5. Alloy repair teeth 4 are evenly distributed on the outside of the cylindrical body 3. The elliptical cylinder part of the camshaft 5 has a major diameter of 70mm, a minor diameter of 60mm, and a length of 100mm. The cylindrical body 3 is frustum-shaped and has a groove that matches the outer diameter of the elliptical cylinder part of the camshaft 5. The cylindrical body 3 has a length of 200mm, an outer diameter of 80mm, a major inner diameter of 70mm, and a minor inner diameter of 60mm. The rotating handle 1 has a diameter of 15mm.

[0026] When the oil pipe thread cleaning and repair device is in operation (i.e., when repairing or cleaning oil pipe threads), the working mode is as follows: Match the camshaft 5 of the oil pipe thread cleaning and repair device with the elliptical space inside the cylinder 3 to minimize the tool's outer diameter. Then, place the oil pipe thread cleaning and repair device into the oil pipe thread, ensuring the alloy repair teeth 4 are close to the thread. Rotating the handle causes the camshaft 5 to shift relative to the elliptical space inside the cylinder 3 due to friction between the alloy repair teeth 4 and the oil pipe thread. This increases the tool's outer diameter, allowing the alloy repair teeth 4 to engage with the damaged thread. Continue rotating the handle to gradually repair the thread while simultaneously cleaning debris from between the threads. After cleaning and repair, reverse the rotation of the tool to remove it.

[0027] The embodiments described above are merely preferred embodiments of the present invention, and not all feasible embodiments of the present invention. Any obvious modifications made by those skilled in the art without departing from the principles and spirit of the present invention should be considered to be included within the scope of protection of the claims of the present invention.

Claims

1. A device for cleaning and repairing oil pipe threads, characterized in that, The device includes a rotating handle (1), a stop block (2), a cylinder (3), alloy repair teeth (4), a camshaft (5), and a fixing screw (6). The camshaft (5) is divided into an elliptical cylinder and a semi-circular ring cylinder. The outer diameter of the elliptical cylinder and the inner diameter of the semi-circular ring cylinder are matched. The rotating handle (1) and the elliptical cylinder part of the camshaft (5) are an integral structure. The stop block (2) is fitted onto the rotating handle (1) and connected to the cylinder (3). Alloy repair teeth (4) are evenly distributed on the outside of the cylinder (3). The cylinder (3) is connected and fixed by the fixing screw (6) and fitted onto the camshaft (5). When the oil pipe thread cleaning and repair device is working, the workmanship is as follows: The operating mode is as follows: Match the camshaft (5) of the oil pipe thread cleaning and repair device with the elliptical space inside the cylinder (3) to minimize the outer diameter of the tool; at this time, place the oil pipe thread cleaning and repair device into the oil pipe thread and make the alloy repair teeth (4) close to the oil pipe thread; rotate the handle, and under the action of the friction between the alloy repair teeth (4) and the oil pipe thread, the camshaft (5) and the elliptical space inside the cylinder (3) will be relatively displaced, the outer diameter of the tool will increase, and the alloy repair teeth (4) will bite into the damaged thread; continue to rotate the handle to gradually repair the thread and clean the debris between the threads at the same time; after cleaning and repairing, rotate the tool in the opposite direction to remove it.

2. The oil pipe thread cleaning and repair device according to claim 1, characterized in that, The cylinder (3) is set as two longitudinally symmetrical parts, each of which is connected and fixed by two fixing screws (6) and sleeved on the camshaft (5).

3. The oil pipe thread cleaning and repair device according to claim 1, characterized in that, The camshaft (5) has an elliptical cylindrical portion with a major diameter of 70mm, a minor diameter of 60mm, and a length of 100mm.

4. The oil pipe thread cleaning and repair device according to claim 1, characterized in that, The cylinder (3) is frustum shaped as a whole and has a groove that matches the outer diameter of the elliptical cylindrical part of the camshaft (5).

5. The oil pipe thread cleaning and repair device according to claim 1, characterized in that, The stop block (2) is threadedly connected to the cylinder (3).

6. The oil pipe thread cleaning and repair device according to claim 1, characterized in that, The diameter of the rotary handle (1) is 10~15mm.

7. The oil pipe thread cleaning and repair device according to claim 4, characterized in that, The length of the cylinder (3) is 200mm.

8. The oil pipe thread cleaning and repair device according to claim 4, characterized in that, The outer diameter of the cylinder (3) is 80mm, the major inner diameter is 70mm, and the minor inner diameter is 60mm.

Images