Efficient spiral composite windowing tool for overhaul of casing damage well

Abstract

The utility model relates to the technical field of casing damage well maintenance tools, in particular to a casing damage well overhaul efficient spiral composite windowing tool which comprises a tool body, the right side of the tool body is of a cylindrical structure, the left end of the tool body is an arc-shaped ball body, the right end of the ball body is provided with a conical structure, and spiral groove belts are evenly arranged on the outer wall of the conical structure and the outer wall of the cylindrical structure. First spiral cutter teeth and second spiral cutter teeth are arranged in the spiral groove belt, the first spiral cutter teeth are rectangular alloy blocks, the second spiral cutter teeth are alloy particles, cutting cutter teeth are arranged on the outer wall of the arc-shaped sphere, a circulating hole is formed in the left end of the tool body, and a through hole is formed in the center of the tool body to serve as a circulating channel. According to the efficient spiral type composite windowing tool for casing damage well overhaul, through the design of the spiral groove belt and the two kinds of cutter teeth, the windowing efficiency and the abrasion resistance of the cutter teeth are improved, multi-direction efficient cutting is achieved through the cutting cutter teeth on the arc-shaped ball body, cooling liquid or drilling fluid can be injected into the circulating holes and the circulating channels, the cutter teeth are prevented from being overheated and blocked by cuttings, and the service life of the cutter teeth is prolonged. And the operation safety and continuity are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of repair tools for casing damaged wells, in particular to a high-efficiency spiral composite window opening tool for major repairs of casing damaged wells. Background Art

[0002] In the oil and gas industry, the repair of casing damaged wells is an important and complex task. A casing damaged well refers to a well in which the casing is damaged, deformed or blocked due to various reasons such as formation pressure changes, wellbore corrosion, mechanical damage, etc. The existence of casing damaged wells not only affects the normal production of oilfields and the stable supply of natural gas, but also may bring potential safety hazards. Timely and effective repair of casing damaged wells is an important measure to ensure the safe production of oil and gas fields.

[0003] In the process of repairing casing damaged wells, side drilling and window opening of the casing is a key step. Side drilling and window opening means opening a window on the original casing for subsequent operations such as side drilling, well repair, well completion, etc. Traditional methods for side drilling and window opening of casings usually use straight-edge alloy band compound tools. Although this method can complete the window opening operation, there are some deficiencies.

[0004] Firstly, the operation efficiency of the straight-edge alloy band compound tool is relatively low. Due to the limitations of its structure and working principle, multiple trips are required to complete the window opening and window repair operations. This not only increases the operation time and labor intensity, but also may lead to an increase in operation costs. Secondly, the window opening speed of the straight-edge alloy band compound tool is slow and it takes a long time to complete the window opening operation. This not only affects the operation efficiency, but also may lead to an extension of the operation cycle. In addition, the flatness and smoothness of the window opened by the straight-edge alloy band compound tool are not ideal enough. The opened window may have problems such as burrs, unevenness, etc., which will affect the quality and efficiency of subsequent operations and may even lead to operation failure or potential safety hazards. Summary of the Invention

[0005] (I) Technical Problems to be Solved

[0006] The utility model provides a high-efficiency spiral composite window opening tool for major repairs of casing damaged wells to overcome the problems existing in the straight-edge alloy band compound tool during window opening operation, such as low flatness and smoothness of the window and large wear on the skew iron.

[0007] (II) Technical Solutions

[0008] To achieve the above object, the utility model provides a high-efficiency spiral composite window opening tool for major repairs of casing damaged wells, including: a tool body;

[0009] The right side of the tool body is a cylindrical structure, and an upper joint is provided at the right end of the tool body;

[0010] The left end of the tool body is a circular arc sphere, and a conical structure is provided at the right end of the circular arc sphere. A number of spiral groove bands are evenly provided on the outer wall of the conical structure and the cylindrical structure;

[0011] First spiral cutter teeth and second spiral cutter teeth are respectively provided in the spiral groove bands. The first spiral cutter teeth are a number of rectangular alloy blocks evenly embedded in the spiral groove bands, and the second spiral cutter teeth are a number of alloy particles evenly embedded in the spiral groove bands;

[0012] A number of cutting teeth are evenly provided on the outer wall of the circular arc sphere. A number of circulation holes are provided at the left end of the tool body, and a through hole is provided at the center of the tool body. The through hole is a circulation channel.

[0013] Preferably, the cone angle of the conical structure is 4° to 10°.

[0014] Preferably, the spiral angle of the spiral groove band is 14° to 30°.

[0015] Preferably, the cutting teeth are composed of a number of alloy hexagonal plates and a number of alloy circular plates.

[0016] Preferably, the outer wall of the upper sub is provided with connecting threads, and the upper sub and the tool body are integrally formed.

[0017] Preferably, the circulation holes are communicated with the circulation channel, and the circulation holes and the circulation channel form a circulation path.

[0018] Preferably, the first spiral cutter teeth and the second spiral cutter teeth are arranged in sequence from left to right.

[0019] (III)Advantages

[0020] The utility model provides a high-efficiency spiral composite window-opening tool for major repair of casing damage wells. Through the design of the spiral groove bands, the first spiral cutter teeth and the second spiral cutter teeth on the tool body, window-opening operations can be effectively carried out in casing damage wells. The spiral structure helps to improve the window-opening efficiency. At the same time, the combination of rectangular alloy blocks and alloy particles makes the cutter teeth more wear-resistant, increasing the service life of the tool. Through the cutting teeth evenly arranged on the outer wall of the circular arc sphere at the left end of the tool body, transverse cutting can be effectively carried out. Cooperating with the cutter teeth in the spiral groove bands, multi-directional high-efficiency cutting is achieved, further improving the window-opening efficiency and quality. By providing circulation holes and a circulation channel, coolant or drilling fluid can be injected during the window-opening process, playing a role in cooling the cutter teeth and discharging chips, avoiding damage caused by overheating of the cutter teeth and chip blockage problems, and improving the safety and continuity of the operation, so as to achieve the purpose of improving the efficiency and quality of window-opening operations. Description of the Drawings

[0021] Figure 1Shows a schematic structural diagram of an efficient spiral composite window-opening tool for major repairs of damaged casing wells in the present utility model;

[0022] Figure 2 Shows Figure 1 The schematic cross-sectional structure diagram of B-B in it;

[0023] Figure 3 Shows Figure 1 The schematic cross-sectional structure diagram of A-A in it;

[0024] Figure 4 Shows a schematic left-view structure diagram of an efficient spiral composite window-opening tool for major repairs of damaged casing wells in the present utility model.

[0025] Among them: 1: Alloy hexagonal piece; 2: Alloy circular piece; 3: Rectangular alloy block; 4: Alloy particles; 5: Circulation hole; 6: Circulation channel; 7: Upper joint; 8: Tool body. Specific embodiments

[0026] The present utility model will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0027] In the description of the present utility model, it is necessary to understand that the orientation or positional relationship indicated by "upper", "lower", "left", "right", "inner", "outer", "top", "bottom", etc. is all based on the orientation or positional relationship shown in the drawings. The purpose is only to facilitate the description of the present utility model and simplify the description, and does not indicate or imply that the indicated components must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present utility model.

[0028] As Figures 1-4 Shown, the present utility model provides an efficient spiral composite window-opening tool for major repairs of damaged casing wells, including: Tool body 8;

[0029] This tool body 8 is the core part of the tool. Its right side is designed as a cylindrical structure. The right end of the tool body 8 is provided with an upper joint 7. The outer wall of the upper joint 7 is provided with connecting threads, which is convenient for connecting with other equipment or tools. The upper joint 7 and the tool body 8 are made into one body to ensure the stability and reliability of the whole system;

[0030] The left end of the tool body 8 is designed as an arc-shaped sphere. This shape helps to perform more efficient cutting in the window opening operation, and can also reduce the friction between the tool and the casing well wall, thereby increasing the service life of the tool. The right end of the arc-shaped sphere is provided with a conical structure, and the cone angle of the conical structure is between 4° and 10°, and 4° is the most preferred. Such a cone angle design enables the tool to be better oriented and stably operated in the casing well, thereby ensuring the reliability and accuracy of the tool under complex well conditions. Several spiral groove belts are evenly arranged on the outer wall of the conical structure and cylindrical structure of the tool body 8, and the helical angle of these spiral groove belts is between 14° and 30°, and 30° is the best choice. The spiral groove belts are respectively provided with a first spiral cutter tooth and a second spiral cutter tooth, and the first spiral cutter tooth and the second spiral cutter tooth are arranged in sequence from left to right. Such an arrangement can ensure that the cutter teeth can evenly cut the pipe in the casing well during the window opening operation, thereby improving the efficiency and quality of the window opening operation.

[0031] The design of the spiral groove belt lengthens the size of the alloy belt, thereby increasing the milling area of ​​the alloy belt and improving the success rate of drilling and opening windows in one trip. When the spiral groove belt rotates, its spiral cutter teeth rotate in a certain spiral, thereby alleviating the impact of contacting the inclined iron surface and the casing surface. Therefore, the side drilling and window opening operation is relatively stable and has no large vibration. In this way, the window opened is relatively flat and smooth, and the wear of the inclined iron is relatively reduced, thereby overcoming the disadvantage of large wear of the inclined iron by the straight edge belt composite tool;

[0032] The first spiral cutter teeth are composed of a plurality of rectangular alloy blocks 3 uniformly embedded in the spiral groove band, and the second spiral cutter teeth are composed of a plurality of alloy particles 4 uniformly embedded in the spiral groove band. This combination makes the cutter teeth more wear-resistant and increases the service life of the tool;

[0033] A plurality of cutting teeth are evenly arranged on the outer wall of the arc-shaped sphere, and these cutting teeth are composed of a plurality of alloy hexagonal sheets 1 and a plurality of alloy discs 2. Such a design can effectively perform transverse cutting, and cooperate with the first spiral teeth and the second spiral teeth in the spiral groove belt to achieve multi-directional efficient cutting, further improving the efficiency and quality of window opening;

[0034] The left end of the tool body 8 is provided with a plurality of circulation holes 5, and the center is provided with a through hole, which is a circulation channel 6. The circulation holes 5 and the circulation channel 6 are connected to form a circulation passage. During the window opening process, coolant or drilling fluid can be injected through these circulation holes and circulation channels to cool the cutter teeth and discharge chips, thereby avoiding damage caused by overheating of the cutter teeth and chip blockage, and improving the safety and continuity of the operation.

[0035] The following is a detailed introduction to the actual working scenario of a high-efficiency spiral composite window-cutting tool for overhaul of casing damaged wells.

[0036] In the actual working process, the tool body 8 of a high-efficiency spiral composite windowing tool for overhaul of casing damage wells is connected to the working string through the upper sub 7. The left end of the arc-shaped sphere of the tool body 8 is provided with cutting teeth, which are composed of alloy hexagonal pieces 1 and alloy circular pieces 2 and are used for transverse cutting. The first spiral cutting teeth and the second spiral cutting teeth in the spiral groove belt are respectively composed of rectangular alloy blocks 3 and alloy particles 4 and are used for longitudinal cutting.

[0037] It can be understood that, without violating the principle logic, the above-mentioned various embodiments mentioned in the present invention can be combined with each other to form combined embodiments. Due to space limitations, the present invention will not elaborate further.

[0038] Those skilled in the art can understand that in the above method of the specific implementation manner, the writing order of each step does not mean a strict execution order and does not constitute any limitation to the implementation process. The specific execution order of each step should be determined according to its function and possible internal logic.

[0039] A high-efficiency spiral composite windowing tool for overhaul of casing damage wells provided by the present invention, through the design of the spiral groove belt and the first spiral cutting teeth and the second spiral cutting teeth on the tool body 8, can effectively perform windowing operations in casing damage wells. The spiral structure helps to improve the windowing efficiency. At the same time, the combination of the rectangular alloy block 3 and the alloy particles 4 makes the cutting teeth more wear-resistant and increases the service life of the tool. Through the cutting teeth evenly arranged on the outer wall of the arc-shaped sphere at the left end of the tool body 8, transverse cutting can be effectively carried out, and in cooperation with the cutting teeth in the spiral groove belt, multi-directional high-efficiency cutting is achieved, further improving the windowing efficiency and quality. By setting the circulation holes 5 and the circulation channels 6, coolant or drilling fluid can be injected during the windowing process, which plays a role in cooling the cutting teeth and discharging the chips, avoiding the problems of damage caused by overheating of the cutting teeth and chip blockage, and improving the safety and continuity of the operation, so as to achieve the purpose of improving the efficiency and quality of the windowing operation.

[0040] The above has described the various embodiments of the present invention. The above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations are obvious to those of ordinary skill in the art in the technical field without departing from the scope and spirit of the described embodiments. The selection of the terms used herein is intended to best explain the principles of the embodiments, the practical application, or the improvement of the technology in the market, or to enable other ordinary skilled persons in the technical field to understand the disclosed embodiments.

Claims

1. An efficient spiral composite window-cutting tool for overhaul of casing damaged wells, characterized in that: include: Tool body (8); The right side of the tool body (8) is a cylindrical structure, and an upper joint (7) is provided at the right end of the tool body (8); The left end of the tool body (8) is an arc-shaped sphere, and the right end of the arc-shaped sphere is provided with a conical structure, and the outer walls of the conical structure and the cylindrical structure are evenly provided with a plurality of spiral grooves; The spiral groove belt is provided with a first spiral blade tooth and a second spiral blade tooth, respectively. The first spiral blade teeth are a plurality of rectangular alloy blocks (3) uniformly embedded in the spiral groove belt, and the second spiral blade teeth are a plurality of alloy particles (4) uniformly embedded in the spiral groove belt. A plurality of cutting teeth are evenly arranged on the outer wall of the arc-shaped sphere, a plurality of circulation holes (5) are arranged at the left end of the tool body (8), and a through hole is arranged at the center of the tool body (8), and the through hole is a circulation channel (6).

2. The high-efficiency spiral composite window-cutting tool for overhaul of casing damaged wells according to claim 1 is characterized in that: The cone angle of the cone structure is 4°~10°.

3. The high-efficiency spiral composite window-cutting tool for overhaul of casing damaged wells according to claim 1 is characterized in that: The helix angle of the spiral groove belt is 14° to 30°.

4. The high-efficiency spiral composite window-cutting tool for overhaul of casing damaged wells according to claim 1 is characterized in that: The cutting teeth are composed of a plurality of alloy hexagonal sheets (1) and a plurality of alloy round sheets (2).

5. The high-efficiency spiral composite window-cutting tool for overhaul of casing damaged wells according to claim 1 is characterized in that: The outer wall of the upper joint (7) is provided with a connecting thread, and the upper joint (7) and the tool body (8) are manufactured as one piece.

6. The high-efficiency spiral composite window-cutting tool for overhaul of casing damaged wells according to claim 1 is characterized in that: The circulation hole (5) is connected to the circulation channel (6), and the circulation hole (5) and the circulation channel (6) form a circulation passage.

7. The high-efficiency spiral composite window-cutting tool for overhaul of casing damaged wells according to claim 3 is characterized in that: The first spiral blade teeth and the second spiral blade teeth are arranged in sequence from left to right.

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