Punching tool for M spring structure of spring auxiliary positioning molded surface

Abstract

The utility model relates to the technical field of subsurface safety valve matching tools for petroleum and natural gas well completion operation, and aims to solve the problems that the working efficiency is low and the safety risk is improved as the matching position of the conventional punching tool and the molded surface of a safety valve needs to be continuously concerned in the punching operation process. The M spring structure punching tool of the spring auxiliary positioning molded surface comprises a hollow shell, an internal transmission mechanism and a hole breaking device. The shell comprises an upper connector and an outer sleeve arranged at the end of the upper connector in a sleeving mode. An M spring and a slip are installed in the upper connector, and the slip is provided with a base used for limiting the slip. In the process that the punching tool enters the safety valve, the outer diameter of the punching tool can be transiently changed through extrusion of the inner wall of the safety valve on the slip and deformation and reset of the M-shaped spring so that the punching tool can rapidly move to the matched position at a time; and the slips are flexibly lifted and descended, so that an internal transmission mechanism can drive the hole breaking device to be lifted and descended, the punching operation is completed, and the operation is simple, reliable and safe.

Description

TECHNICAL FIELD

[0001] The utility model relates to the downhole safety valve matched tool technical field for oil and gas well completion operation, in particular to a spring auxiliary positioning profile M spring structure perforating tool. BACKGROUND

[0002] During the downhole operation of oil and gas well, the fluid flow rate is often increased due to the failure of mining equipment or earthquake, which needs to close the fluid passage in time to avoid the occurrence of serious accidents. The downhole safety valve is a downhole tool placed in the wellbore and connected to the oil pipe to prevent blowout and ensure production safety. It can close the fluid passage in the oil pipe and block the fluid to ensure the safety of the operation when abnormal conditions occur on the ground or downhole.

[0003] The downhole safety valve has various classifications, including the oil pipe recyclable safety valve and the cable recyclable safety valve, i.e., the steel wire safety valve. In the field operation of the oil pipe recyclable safety valve, the valve plate sealing failure is unavoidable due to the complex and harsh downhole environment and service life. In order to ensure the safety of production on site, the steel wire safety valve needs to be used to replace the failed oil pipe recyclable safety valve to ensure the safety of the whole well line. At this time, the perforating tool is needed to open a hole in the previous oil pipe recyclable safety valve to ensure the installation of the steel wire safety valve.

[0004] The related technology of the existing perforating tool needs to match the upper joint of the perforating tool shell with the inner wall position of the safety valve profile first, then cooperate the internal transmission mechanism with the profile in the vertical direction through the jacks, and finally perform the perforating operation. The recovery and running-in processes are similar. The whole operation process is complicated and needs to constantly pay attention to the matching position, which greatly wastes time, reduces work efficiency, and increases safety risks.

[0005] Therefore, it is urgent to provide a spring auxiliary positioning profile M spring structure perforating tool that can be unaffected by the inner wall of the oil pipe recyclable safety valve and can efficiently, flexibly and safely complete the perforating operation. UTILITY MODEL CONTENT

[0006] The utility model aims at solving the problem of the existing perforating tool that needs to constantly pay attention to the matching position with the safety valve profile during the perforating operation, which reduces work efficiency and increases safety risks. The utility model provides a spring auxiliary positioning profile M spring structure perforating tool, which can achieve the technical effect of being unaffected by the inner wall of the oil pipe recyclable safety valve and efficiently, flexibly and safely completing the perforating operation.

[0007] The utility model discloses a spring auxiliary positioning profile's M spring structure punching tool, including hollow shell, internal transmission mechanism and hole breaking device, the shell includes upper joint and outer sleeve, the outer sleeve is equipped with the end of upper joint, install M spring and slip in the upper joint, the one end of slip near the outer sleeve is equipped with base, the base is equipped with between the upper joint and the outer sleeve, the M spring is arranged between the upper joint and the slip.

[0008] Preferably, the number of M springs and slips is two, and the two M springs and the two slips are symmetrically arranged along the central axis of the upper joint.

[0009] Preferably, the internal transmission mechanism comprises a fishing cap, a mandrel and a guide shaft connected in sequence, the guide shaft is movably arranged in the inner cavity of the outer sleeve, one end of the mandrel is detachably connected with the end of the guide shaft close to the upper joint, and the fishing cap is sleeved on the other end of the mandrel.

[0010] Preferably, the guide shaft and the outer sleeve are detachably connected through a shear pin.

[0011] Preferably, the fishing cap and the mandrel are detachably connected through threads and screws, and the mandrel and the guide shaft are detachably connected through threads and screws.

[0012] Preferably, the hole breaking device comprises a hole breaking pin and a pin seat, the bottom of the pin seat is slidably connected with the outer wall surface of the guide shaft, the side of the guide shaft facing the pin seat is an inclined structure with the left side being higher than the right side, the side of the outer sleeve facing the pin seat is provided with an opening, and the opening is used for the pin seat to enter and exit; the top of the pin seat is provided with a groove, and the hole breaking pin is installed in the groove.

[0013] Preferably, the hole breaking device further comprises an upper cover plate, the upper cover plate is detachably connected with the top of the pin seat, the upper cover plate is provided with a through hole, and the hole breaking pin passes out of the through hole.

[0014] Preferably, the inclined side of the guide shaft is provided with a slide rail along the length direction of the guide shaft, the bottom of the pin seat is provided with a sliding block, and the sliding block is embedded in the slide rail.

[0015] The technical scheme of the utility model has the following beneficial effects:

[0016] (1) The deformation and reset of the M spring are used to achieve the matching with the safety valve profile. During the process of the drilling tool entering the safety valve, the inner wall of the safety valve squeezes the slip, and the slip squeezes the M spring to make the outer diameter of the drilling tool change briefly, so as to realize the drilling tool moving to a specific position quickly and in one go; by adopting the structure of the elastic mechanism M spring cooperating with the slip, the squeezing of the slip by the inner wall of the safety valve and the deformation and reset of the M spring are used to realize the flexible raising and lowering of the slip, which in turn can drive the internal transmission mechanism to raise and lower the drilling device, thereby completing the drilling operation. The operation is simple, reliable and safe.

[0017] (2) The base is designed to limit the movement of the slip to prevent it from shifting during travel.

[0018] (3) The connection of the shear pin and subsequent shearing ensured the relative positional relationship between the outer tube in the outer shell and the guide shaft in the internal transmission mechanism under different operation steps, thereby ensuring smooth drilling operation.

[0019] (4) By sliding the pin seat on the inclined side of the guide shaft, the lifting and lowering of the pin seat and the hole-breaking pin can be easily controlled, thereby further ensuring the smoothness of the entire drilling operation.

[0020] (5) Hole-breaking device structure design: The upper cover plate and the pin seat are connected by internal hexagonal head screws, which can ensure the stability of the hole-breaking pin. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the M-spring structure drilling tool in Embodiment 1 of this utility model;

[0022] Figure 2 This is a cross-sectional view of the M-spring structure drilling tool in Embodiment 1 of this utility model;

[0023] Figure 3 for Figure 2 A magnified structural diagram of part A in the middle;

[0024] Figure 4 for Figure 2 A magnified structural diagram of part B in the middle section;

[0025] Figure 5 This is a schematic diagram of the M-spring in Embodiment 1 of this utility model.

[0026] Reference numerals: 1-Outer shell, 11-Upper connector, 12-Outer sleeve, 2-Internal transmission mechanism, 21-Retrieval cap, 22-Mandrel, 23-Guide shaft, 24-Slide rail, 3-Breaking device, 31-Breaking pin, 32-Pin seat, 33-Upper cover plate, 34-Slider, 4-M spring, 41-Fitting part, 42-Elastic part, 5-Clamping slip, 6-Base, 7-Shearing pin, 8-American standard hexagon socket head cap screw, 9-Hexagon socket head cap screw. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. The components of the embodiments of the present invention described and shown herein can generally be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0029] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0030] Example 1

[0031] like Figures 1 to 5 As shown, this embodiment provides a spring-assisted positioning M-spring structure drilling tool, including a hollow outer shell 1, an internal transmission mechanism 2, and a drilling device 3. The outer shell 1 includes an upper connector 11 and an outer sleeve 12 fitted onto the end of the upper connector 11. The outer sleeve 12 and the upper connector 11 are screwed together by American standard hexagonal set screws 8. An M-spring 4 and a locking piece 5 are installed in the upper connector 11. A base 6 of the locking piece 5, located near the end of the outer sleeve 12, is engaged between the upper connector 11 and the outer sleeve 12. The M-spring 4 is positioned between the upper connector 11 and the locking piece 5. The contact portion 41 of the M-spring 4 is arc-shaped, allowing it to firmly fit against the cylindrical surface of the upper connector 11. The elastic portion 42 of the M-spring 4 abuts against the locking piece 5.

[0032] The M-spring 4 is the core component of this drilling tool. Its deformation and repositioning allow it to engage with the safety valve's surface. The base 6 limits the horizontal movement of the slip 5, preventing it from shifting during operation. The internal transmission mechanism 2 is temporarily fixed to the outer shell 1. Moving along the inner cavity of the outer shell 1 via the internal transmission mechanism 2 drives the drilling device 3 in and out of the outer shell 1, thus performing the drilling operation.

[0033] During the process of the drilling tool entering the safety valve, the inner wall of the safety valve compresses the slip 5, which in turn compresses the M spring 4, causing a brief change in the outer diameter of the drilling tool. This allows the drilling tool to move quickly and in one go to a specific position. By employing a structure in which the elastic mechanism M spring 4 cooperates with the slip 5, the squeezing of the slip 5 by the inner wall of the safety valve and the deformation and reset of the M spring 4 enable the slip 5 to rise and fall flexibly. This, in turn, allows the internal transmission mechanism 2 to drive the drilling device 3 to rise and fall, thereby completing the drilling operation. The operation is simple, reliable, and safe.

[0034] In this embodiment, there are two M springs 4 and two slips 5. The two M springs 4 and the two slips 5 are symmetrically arranged along the central axis of the upper connector 11 so that they can fit with the entire inner wall of the safety valve.

[0035] In this embodiment, the internal transmission mechanism 2 includes a retrieval cap 21, a spindle 22, and a guide shaft 23 connected in sequence. The guide shaft 23 is movably disposed within the inner cavity of the outer sleeve 12. One end of the spindle 22 is screwed to the end of the guide shaft 23 near the upper connector 11. The retrieval cap 21 is fitted onto the other end of the spindle 22. Because the safety valve is installed deep, by connecting the retrieval cap 21 to the wire tool of the external vibrator, the entire drilling tool can be easily lowered into the safety valve.

[0036] In this embodiment, the guide shaft 23 and the outer sleeve 12 are connected by a shear pin 7 for temporary fixation. The connection and subsequent shearing of the shear pin 7 ensures the relative positional relationship between the outer sleeve 12 in the outer casing 1 and the guide shaft 23 in the internal transmission mechanism 2 under different operating steps, thereby ensuring smooth drilling operations.

[0037] In this embodiment, the retrieval cap 21 and the spindle 22 are connected by threads and American standard hexagonal set screws 8, and the spindle 22 and the guide shaft 23 are connected by threads and American standard hexagonal set screws 8, making the connection stable.

[0038] In this embodiment, the drilling device 3 includes a drilling pin 31 and a pin seat 32. The bottom of the pin seat 32 is slidably connected to the outer wall of the guide shaft 23. The side of the guide shaft 23 facing the pin seat 32 has an inclined structure with the left side higher than the right side. An opening is provided on the side of the outer sleeve 12 facing the pin seat 32 for the pin seat 32 to enter and exit. A groove is provided on the top of the pin seat 32, and the drilling pin 31 is installed in the groove. By sliding the pin seat 32 on the inclined side of the guide shaft 23, the lifting and lowering of the pin seat 32 and the drilling pin 31 can be easily controlled, thereby further ensuring the smoothness of the entire drilling operation.

[0039] In this embodiment, the piercing device 3 also includes an upper cover plate 33, which is screwed to the top of the pin seat 32 by an internal hexagon head screw 9. The upper cover plate 33 has a through hole through which the piercing pin 31 passes. The connection between the upper cover plate 33 and the pin seat 32 by the internal hexagon head screw 9 ensures the stability of the piercing pin 31.

[0040] In this embodiment, a slide rail 24 is provided on the inclined side of the guide shaft 23 along the length direction of the guide shaft 23, and a slider 34 is provided at the bottom of the pin seat 32, with the slider 34 embedded in the slide rail 24. The design of the slide rail 24 and the slider 34 facilitates the smooth sliding of the pin seat 32 on the inclined side of the guide shaft 23.

[0041] The specific working process of the punching tool provided by this utility model is as follows:

[0042] S1: The drilling tool is lowered by connecting the retrieval cap 21 to the wire tool of the external shocker; before the drilling tool enters the oil pipe retrievable safety valve, the slip 5 is not in contact with the extrusion, the slip 5 is lifted by the M spring 4, the drilling tool is in the maximum outer diameter state, and continues to approach the safety valve. Since the outer diameter of the safety valve is smaller than the outer diameter of the drilling tool when it is lifted, except for the profile position.

[0043] S2: When the slip 5 contacts the inner wall of the safety valve, as the spindle 22 of the internal transmission mechanism 2 is pushed in, the slip 5 is squeezed by the inner wall of the safety valve, which in turn squeezes the M spring 4. The M spring 4 is in a compressed state at this time. After the slip 5 is compressed, it begins to move towards the safety valve profile position. As the spindle 22 is continuously pushed in, the slip 5 gradually moves to the safety valve profile position.

[0044] S3: When the slip 5 is fully moved to the inner wall profile of the safety valve, the slip 5 is no longer subjected to the squeezing force from the inner wall of the safety valve, and the M spring 4 is reset. The slip 5 is springed back to the profile by the elastic force of the M spring 4. The slip 5 is moved into place, and the drilling tool reaches the outer diameter that matches the profile position of the safety valve. At this time, the slip 5 is in contact with the inner wall of the safety valve profile, so that the outer shell 1 of the drilling tool can no longer drive the slip 5 to move.

[0045] S4: As the spindle 22 continues to push, the shear pin 7 is subjected to shearing force from the thrust of the spindle 22, and the shear pin 7 is cut off. The outer casing 1 part stops moving, and the internal transmission mechanism 2 continues to move.

[0046] S5: The spindle 22 continues to push the guide shaft 23 forward, and the guide shaft 23 drives the pin seat 32 of the piercing device 3 to lift upward, and the piercing pin 31 of the piercing device 3 begins to move towards the weak position of the safety valve; the spindle 22 continues to push, and the piercing pin 31 contacts the weak position of the safety valve;

[0047] S6: When the spindle 22 is pushed into place and moves to the predetermined position, the piercing pin 31 breaks the weak point in the inner wall of the safety valve.

[0048] S7: After drilling is completed, pull the mandrel 22, and the mandrel 22 contacts the upper connector 11; the mandrel 22 drives the entire drilling tool to move outward, and the process of the slip 5 moving out of the safety valve profile is the same as the principle of entering the safety valve; completely remove the entire drilling tool from the safety valve, and the operation is completed.

[0049] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A drilling tool with an M-spring structure and a spring-assisted positioning surface, characterized in that, It includes a hollow outer shell (1), an internal transmission mechanism (2), and a perforation device (3); The outer casing (1) includes an upper connector (11) and an outer sleeve (12). The outer sleeve (12) is fitted onto the end of the upper connector (11). An M-spring (4) and a locking piece (5) are installed in the upper connector (11). A base (6) is provided at one end of the locking piece (5) near the outer sleeve (12). The base (6) is engaged between the upper connector (11) and the outer sleeve (12). The M-spring (4) is disposed between the upper connector (11) and the locking piece (5).

2. The punching tool according to claim 1, characterized in that, The number of M springs (4) and the number of slips (5) are both two, and the two M springs (4) and the two slips (5) are symmetrically arranged along the central axis of the upper connector (11).

3. The punching tool according to claim 1, characterized in that, The internal transmission mechanism (2) includes a retrieval cap (21), a spindle (22) and a guide shaft (23) connected in sequence. The guide shaft (23) is movably disposed in the inner cavity of the outer sleeve (12). One end of the spindle (22) is detachably connected to the end of the guide shaft (23) near the upper connector (11). The retrieval cap (21) is sleeved on the other end of the spindle (22).

4. The punching tool according to claim 3, characterized in that, The guide shaft (23) and the outer sleeve (12) are detachably connected by a shear pin (7).

5. The punching tool according to claim 3, characterized in that, The retrieval cap (21) and the spindle (22) are detachably connected by threads and screws, and the spindle (22) and the guide shaft (23) are detachably connected by threads and screws.

6. The punching tool according to any one of claims 3 to 5, characterized in that, The hole-breaking device (3) includes a hole-breaking pin (31) and a pin seat (32). The bottom of the pin seat (32) is slidably connected to the outer wall of the guide shaft (23). The side of the guide shaft (23) facing the pin seat (32) has an inclined structure with the left side higher than the right side. The outer sleeve (12) has an opening on the side facing the pin seat (32) for the pin seat (32) to enter and exit. The top of the pin seat (32) is provided with a groove, and the piercing pin (31) is installed in the groove.

7. The punching tool according to claim 6, characterized in that, The piercing device (3) also includes an upper cover plate (33), which is detachably connected to the top of the pin seat (32). The upper cover plate (33) has a through hole through which the piercing pin (31) passes.

8. The punching tool according to claim 6, characterized in that, A slide rail (24) is provided on one inclined side of the guide shaft (23) along the length direction of the guide shaft (23), and a slider (34) is provided at the bottom of the pin seat (32), and the slider (34) is embedded in the slide rail (24).

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