Long life multi-stage tool bushing swage and mill tool

Abstract

The application discloses a long-life multistage cutter sleeve forging and milling tool and belongs to the technical field of petroleum. The tool is composed of a shell, cutters and an executing component. The shell comprises an upper shell, a coupling cutter shell, a forging and milling cutter shell, a lower shell and a windowing cutter shell. The cutters comprise a windowing cutter, a forging and milling cutter and a coupling cutter. The executing component is arranged in the shell and can separate the windowing operation from the forging and milling operation. The forging and milling cutter extends radially outward, thus increasing the length of the forging and milling cutter. Even if the bottom of the forging and milling cutter is damaged, the forging and milling of the sleeve can still be carried out by using the overall strength of the forging and milling cutter until the entire cutter is worn out and fails. The length of the cutter is exchanged for the speed of the segment milling operation and the forging and milling time. The tool can carry out long-time forging and milling operation, greatly improves the forging and milling operation efficiency and reduces the forging and milling operation cost.

Description

Technical Field

[0001] This invention relates to the field of petroleum technology, and more particularly to a long-life, multi-stage forging and milling tool for sleeves. Background Technology

[0002] With socio-economic development, global oil demand continues to grow. However, as the international oil situation constantly changes, domestic oil and gas well development faces more challenges. Oil and gas well development needs to reduce costs and increase efficiency, and tapping the potential of old wells is a major way to achieve this. Developing old wells typically requires sidetracking, followed by milling and window opening on the existing wellbore, and milling the casing to a specified length. Simultaneously, low-production oil and gas wells also require well abandonment, which mainly involves casing milling. Traditional milling tools have low milling speeds and short tool lives, requiring frequent tool replacements, resulting in low milling efficiency and high operating costs, severely impacting sidetracking operations in old wells. Currently, there is an urgent need for a long-life, multi-stage tool casing milling tool that can improve milling efficiency, shorten milling operation time, and reduce milling costs. Summary of the Invention

[0003] To address the aforementioned technical problems, this invention provides a long-life, multi-stage tool for forging and milling sleeves. The tool uses different tools for opening windows and forging and milling respectively. The forging and milling tool extends radially outward, increasing its length. Even if the bottom of the forging and milling tool is damaged, the overall strength of the forging and milling tool can still be used to forge and mill the sleeve until the entire tool wears out and fails. By trading tool length for the speed of segment milling and the forging and milling time, the efficiency of forging and milling operations is greatly improved and the cost of forging and milling operations is reduced.

[0004] This invention proposes a long-life, multi-stage tool sleeve forging and milling tool, comprising:

[0005] The tool mainly consists of a housing, cutting tools, and actuating components. The housing includes an upper housing, a coupling tool housing, a forging and milling tool housing, a lower housing, and a window-opening tool housing. The cutting tools include a window-opening tool, a forging and milling tool, and a coupling tool. The actuating components are located inside the housing. The upper housing houses an upper long shaft support frame and a spring support frame. The upper long shaft passes through a first connector and is threadedly connected to a pusher shaft. The upper long shaft support frame is threadedly connected to the upper long shaft. An upper spring pushes the spring support frame against the lower end of the long shaft support frame. The upper spring is installed between the first connector and the spring support frame. The upper housing is threadedly connected to the first connector. The upper end of the coupling tool housing is threadedly connected to the lower end of the first connector, and the lower end is threadedly connected to the upper end of the second connector. The coupling tool fixing frame is connected to the coupling tool housing with hexagonal socket screws. The coupling tool is fixed to the coupling tool fixing frame by an upper tool pin and can rotate around the tool pin. The coupling tool limiting frame is connected to the coupling tool housing with hexagonal socket screws. The lower end of the pusher shaft is threadedly connected to the upper end of the second pusher shaft. The upper end of the forging and milling tool housing is threadedly connected to the lower end of the second connector. The lower end is threaded to the upper end of the third connector. The second pusher shaft passes through the second connector, and its lower end is connected to the connecting shaft. The forging milling cutter is mounted on the forging milling cutter housing via ribs on the cutter. A high-strength spring is installed above the third connector, and its upper end is connected to a high-strength spring frame. The upper end of the high-strength spring frame contacts the lower end of the forging milling cutter. The upper end of the lower housing is threaded to the lower end of the third connector, and the lower end of the lower housing is threaded to the upper end of the fourth connector. The connecting shaft passes through the third connector and is threaded to the third pusher shaft. The pusher shaft support frame is connected to the... The three pusher shafts are threaded together. A lower spring is installed above the fourth connector. The lower spring support bracket is installed on the lower spring, and the upper end of the lower spring support bracket contacts the lower end of the pusher shaft support bracket. The upper end of the window-opening cutter housing is threadedly connected to the lower end of the fourth connector. The third pusher shaft passes through the fourth connector, and the step of the third pusher shaft contacts the window-opening cutter. The window-opening cutter fixing bracket is fixed to the window-opening cutter housing by hexagon socket screws. The window-opening cutter is fixed to the window-opening cutter fixing bracket by a fixing pin. The window-opening cutter limit bracket is fixed to the lower part of the window-opening cutter by hexagon socket screws.

[0006] A further improvement of the present invention is that the window-opening tool is used for the window-opening work during the milling of the casing section, the forging milling tool is used for the forging milling process after the window is opened, and when the forging milling reaches the casing coupling, the coupling tool performs forging milling on the coupling. The three tools have a clear division of labor to improve the forging milling efficiency.

[0007] A further improvement of the present invention is that drilling fluid is introduced into the tool through the upper long shaft, and the pressure difference causes the upper long shaft to drive the pusher shaft, the second pusher shaft, and the third pusher shaft to move downward. During the movement, the window cutter unfolds, then the drilling fluid is pressurized, the pusher shaft continues to move, the window cutter retracts, and then the forging milling cutter and the coupling cutter unfold to perform forging milling operations.

[0008] A further improvement of the present invention is that after the window opening operation is completed, the entire tool moves downward so that the forging milling cutter reaches the window opening position. The second pusher axis moves downward and gradually pushes the forging milling cutter to extend radially outward. When the strong spring support frame contacts the third joint, the extension reaches its maximum value. The length of the forging milling cutter is much greater than that of the window opening cutter, enabling long-term sleeve forging milling.

[0009] Compared with existing forging and milling tools, the advantages of this invention are:

[0010] The present invention discloses a long-life multi-stage tool sleeve forging and milling tool, which can control different tools to extend in sequence according to different operations, with clear division of labor among the tools. Moreover, the unfolding method of the forging and milling tool is different from the general rotary tool expanding method. The unfolding method of the present invention allows the forging and milling tool to have a greater length than existing tools, thereby improving forging and milling efficiency. Attached Figure Description

[0011] Figure 1 The diagram shown is a structural schematic of a downhole casing forging and milling tool according to an embodiment of the present invention.

[0012] Figure 2 The diagram shown is a schematic representation of the unfolded window-opening tool in a downhole casing forging and milling tool according to an embodiment of the present invention.

[0013] Figure 3 The diagram shown is a schematic representation of the forging and milling cutter and coupling cutter in a downhole casing forging and milling tool according to an embodiment of the present invention.

[0014] Figure 4 The diagram shown is a schematic diagram of the structure and assembly of the forging and milling cutter in a downhole casing forging and milling tool according to an embodiment of the present invention.

[0015] In the diagram: 1. Upper housing, 2. Long shaft support frame, 3. Spring support frame, 4. Upper spring, 5. First connector, 6. Coupling tool housing, 7. Coupling tool fixing frame, 8. Coupling tool, 9. Coupling tool limiting frame, 10. Second connector, 11. Second pusher shaft, 12. Pusher shaft, 13. Tool pin, 14. Upper long shaft, 15. Forging milling tool housing, 16. Forging milling tool holder, 17. Forging milling tool, 18. High-strength spring frame, 19. High-strength spring, 20. Connecting shaft, 21. Third connector, 22. Lower housing, 23. Pusher shaft support frame, 24. Lower spring support frame, 25. Lower spring, 26. Fourth connector, 27. Windowed tool housing, 28. Windowed tool fixing frame, 29. Third pusher shaft, 30. Windowed tool, 31. Windowed tool limiting frame, 32. Fixing pin. Detailed Implementation

[0016] To make the technical solutions and advantages of the present invention clearer, exemplary embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not an exhaustive list of all embodiments. Furthermore, the embodiments and features in the embodiments of the present invention can be combined with each other without conflict. It should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0017] Figure 1This illustration schematically depicts a long-life, multi-stage tool sleeve forging and milling tool according to an embodiment of the present invention. It mainly comprises a housing, cutting tools, and an actuating component. The housing includes an upper housing 1, a coupling tool housing 6, a forging and milling tool housing 15, a lower housing 22, and a windowed tool housing 27. The cutting tools include a windowed tool 30, a forging and milling tool 17, and a coupling tool 8. The actuating component is located inside the housing. An upper long shaft support frame 2 and a spring support frame 3 are installed inside the upper housing 1. The upper long shaft 14 passes through a first connector 5 and is threadedly connected to a pusher shaft 12. The upper long shaft support frame is threadedly connected to the upper long shaft. An upper spring 4 pushes the spring support frame 3 against the long shaft support frame 2. At the lower end, the upper spring 4 is installed between the first connector 5 and the spring support frame 3. The upper housing 1 is threadedly connected to the first connector 5. The upper end of the coupling tool housing 6 is threadedly connected to the lower end of the first connector 5, and the lower end is threadedly connected to the upper end of the second connector 11. The coupling tool fixing frame 7 is connected to the coupling tool housing 6 by an internal hex screw. The coupling tool 8 is fixed to the coupling tool fixing frame 7 by the upper tool pin 13 and can rotate around the tool pin 13. The coupling tool limiting frame 9 is connected to the coupling tool housing 6 by an internal hex screw. The lower end of the pusher shaft 12 is threadedly connected to the upper end of the second pusher shaft 11. The upper end of the forging and milling tool housing 15 is threadedly connected to the lower end of the second connector 10, and the lower end is threadedly connected to the third connector 11. The upper end of head 21 is threadedly connected. The second pusher shaft 11 passes through the second connector 10, and its lower end is connected to the connecting shaft 20. The forging milling cutter 17 is mounted on the forging milling cutter housing 15 via a step 17a on the cutter and is placed inside the forging milling cutter holder 16. The forging milling cutter holder 16 is connected to the high-strength spring frame 18 by screws. The high-strength spring 19 is installed above the third connector and is connected to the high-strength spring frame 18 at its top. The upper end of the high-strength spring frame 18 contacts the lower end of the forging milling cutter 17. The upper end of the lower housing 22 is threadedly connected to the lower end of the third connector 21, and the lower end of the lower housing 22 is threadedly connected to the upper end of the fourth connector 26. The connecting shaft 20 passes through the third connector 21 and is threadedly connected to the third pusher shaft 35. The pusher shaft support bracket 23 is threadedly connected to the third pusher shaft 29. A lower spring 25 is installed above the fourth connector 26. The lower spring support bracket 23 is installed on the lower spring 25, and the upper end of the lower spring support bracket 23 contacts the lower end of the pusher shaft support bracket 23. The upper end of the window-opening tool housing 27 is threadedly connected to the lower end of the fourth connector 26. The third pusher shaft 29 passes through the fourth connector 26. The step 29a of the third pusher shaft contacts the window-opening tool 30. The window-opening tool fixing bracket 27 is fixed to the window-opening tool housing 27 by hexagon socket screws. The window-opening tool 30 is fixed to the window-opening tool fixing bracket 27 by fixing pin 32. The window-opening tool limiting bracket 31 is fixed to the bottom of the window-opening tool by hexagon socket screws.

[0018] When using the downhole casing forging and milling tool according to this embodiment, drilling fluid is introduced into the tool. Under the action of fluid pressure, the upper long shaft 14 drives the pusher shaft 12, the second pusher shaft 11, and the third pusher shaft 29 to move downwards, as shown below. Figure 2 As shown, during the movement, the step 29a of the third pusher shaft first pushes the window-opening tool 30 out of the housing. At this time, the pusher shaft step 12a and the second pusher shaft step 11a have not reached their respective tool positions. Maintaining the drilling fluid pressure at this time, the downhole casing forging and milling tool is rotated to perform window opening operations on the casing.

[0019] After completing the casing window opening operation, the downhole casing forging and milling tool described in this embodiment moves downwards until the forging and milling cutter 17 reaches the position after the casing window is opened. Then, the drilling fluid is pressurized, and the third pusher shaft 29 continues to move, as... Figure 3 As shown, the third pusher shaft step 29a moves away from the window-opening tool 30, and the window-opening tool 30 retracts. At this time, the pusher shaft step 12a pushes the coupling tool 8 out completely, and the second pusher shaft step 11a pushes the outermost part of the forging and milling tool 17. Then, the drilling fluid pressure is maintained at this time, and the casing is forged and milled.

[0020] Furthermore, such as Figure 4 As shown, the forging milling cutter step 17a mates with the forging milling cutter housing groove 15a, and the second pusher shaft 12 pushes the forging milling cutter 17 downward along the forging milling cutter step 17a, as... Figure 3 As shown, when the bottom of the forging milling cutter holder 16 contacts the forging milling cutter housing 15, the radial extension of the forging milling cutter 17 reaches its maximum value.

[0021] In some preferred embodiments, the window-opening tool 30 performs window opening and milling operations. When the window-opening tool 30 fails, the downhole casing milling tool of this embodiment is moved downwards, and the milling tool 17 reaches the milling position to continue the milling operation. This further improves the efficiency of the milling operation.

[0022] After the casing forging and milling is completed, the downhole casing forging and milling tool described in this embodiment is lifted up a short section to allow the window cutter to unfold sufficiently. The drilling fluid pressure is gradually reduced, and under the restoring force of the upper spring 4 and the lower spring 25, the pusher shaft 12 and the third pusher shaft 29 are pushed upward. The window cutter 30 unfolds first and then retracts, while the coupling cutter 8 is directly retracted. Under the restoring force of the strong spring 19, the forging and milling cutter holder 16 is pushed upward, and the forging and milling cutter 17 moves upward along the step 17a and retracts into the housing.

[0023] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A long-life, multi-stage tool sleeve forging and milling tool, characterized in that: It is mainly composed of a housing, cutting tools, and actuating components. Its features include: the housing comprising an upper housing (1), a coupling cutting tool housing (6), a forging milling tool housing (15), a lower housing (22), and a window-opening cutting tool housing (27); the cutting tools comprising a window-opening cutting tool (30), a forging milling tool (17), and a coupling cutting tool (8); the actuating components are located inside the housing. The upper housing (1) contains an upper long shaft support frame (2) and a spring support frame (3). The upper long shaft (14) passes through a first joint (5) and is threadedly connected to the pusher shaft (12). The upper long shaft support frame is threadedly connected to the upper long shaft. The upper spring (4) supports the spring support frame (3). The upper spring (4) is installed between the first connector (5) and the spring support frame (3) at the lower end of the long shaft support frame (2). The upper housing (1) is connected to the first connector (5) by a thread. The upper end of the coupling tool housing (6) is connected to the lower end of the first connector (5) by a thread, and the lower end is connected to the upper end of the second connector (10) by a thread. The coupling tool fixing frame (7) is connected to the coupling tool housing (6) by an internal hex screw. The coupling tool (8) is fixed to the coupling tool fixing frame (7) by the upper tool pin (13) and can rotate around the tool pin (13). The coupling tool limiting frame (9) is connected to the coupling tool housing (6) by an internal hex screw. The lower end of shaft (12) is threaded to the upper end of the second pusher shaft (11); the upper end of the forging milling cutter housing (15) is threaded to the lower end of the second connector (10), and the lower end is threaded to the upper end of the third connector (21). The second pusher shaft (11) passes through the second connector (10), and the lower end is connected to the connecting shaft (20). The forging milling cutter (17) is assembled on the forging milling cutter housing (15) through the step (17a) on the cutter and placed inside the forging milling cutter holder (16). The forging milling cutter holder (16) is connected to the high-strength spring holder (18) by screws. The high-strength spring (19) is installed above the third connector (21) and above the high-strength spring holder. (18) Connection: The upper end of the strong spring frame (18) is in contact with the lower end of the forging milling cutter frame (16); the upper end of the lower housing (22) is threadedly connected to the lower end of the third connector (21), the lower end of the lower housing (22) is threadedly connected to the upper end of the fourth connector (26), the connecting shaft (20) passes through the third connector (21) and is threadedly connected to the third pusher shaft (35), the pusher shaft support frame (23) is threadedly connected to the third pusher shaft (29), a lower spring (25) is installed above the fourth connector (26), the lower spring support frame (24) is installed on the lower spring (25), and the upper end of the lower spring support frame (24) is in contact with the lower end of the pusher shaft support frame (23);The upper end of the window-opening cutter housing (27) is threaded to the lower end of the fourth connector (26). The third pusher shaft (29) passes through the fourth connector (26), and the step (29a) of the third pusher shaft contacts the window-opening cutter (30). The window-opening cutter fixing bracket (28) is fixed to the window-opening cutter housing (27) by hexagonal screws. The window-opening cutter (30) is fixed to the window-opening cutter fixing bracket (28) by a fixing pin (32). The window-opening cutter limiting bracket (31) is fixed to the bottom of the window-opening cutter by hexagonal screws.

2. The long-life multi-stage tool sleeve forging and milling tool according to claim 1, characterized in that: The three types of cutting tools correspond to different operations. The window opening tool (30) is used for opening the window during the milling of the casing section. The forging milling tool (17) is used for the forging milling process after opening the window. When the forging milling reaches the casing coupling, the coupling tool (8) performs forging milling on the coupling.

3. A long-life multi-stage tool sleeve forging and milling tool according to claim 2, characterized in that: Drilling fluid is introduced into the tool through the upper long shaft (14). The fluid pressure causes the upper long shaft (14) to drive the pusher shaft (12), the second pusher shaft (11), and the third pusher shaft (29) to move downward. During the movement, the window cutter (30) unfolds, maintaining the drilling fluid pressure. The downhole casing forging and milling tool is rotated to perform the window opening operation. After the operation is completed, the drilling fluid is pressurized, the third pusher shaft (29) continues to move, the window cutter (30) is retracted, and then the forging and milling tool (17) and the coupling tool (8) unfold to perform the forging and milling operation.

4. A long-life multi-stage tool sleeve forging and milling tool according to claim 3, characterized in that: After the window opening operation is completed, the entire tool moves downward so that the forging milling cutter (17) reaches the window opening position. The second pusher shaft (11) moves downward and gradually pushes the forging milling cutter holder (16). The forging milling cutter (17) moves downward along the step (17a) and extends radially outward. When the forging milling cutter holder (16) contacts the forging milling cutter housing (15), the extension reaches its maximum value. The length of the forging milling cutter (17) is much greater than that of the window opening cutter (30), which can perform long-term sleeve forging milling.

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