Oil pipe tapping tool

Abstract

This invention provides a tubing tapping tool, relating to the field of unconventional oil and gas reservoir development technology. The tool consists of a pressure rod inserted into an outer sleeve, a transmission disc connected to a drive pin and a driven pin, and a tapping assembly slidably connected to the drive pin via a first through hole. As the pressure rod extends further into the outer sleeve, the drive pin moves in the first through hole, rotating the transmission disc and causing the driven pin to push the tapping assembly out of the outer sleeve, thus squeezing the tubing and achieving tapping. When the pressure rod moves in the direction of withdrawal from the outer sleeve, the drive pin moves in the first through hole, rotating the transmission disc and causing the driven pin to push the tapping assembly back into the outer sleeve, completing the resetting process. This process continues until all tapping operations are completed, at which point the tapping tool is removed, completing the construction.

Description

Technical Field

[0001] This invention relates to the field of unconventional oil and gas reservoir development technology, and in particular to a tubing tapping tool. Background Technology

[0002] When tubing becomes blocked during oil and gas well production, it directly affects the normal production of the well. If the unblocking process fails, the tubing string needs to be pulled out for unblocking. Before pulling out the tubing string, circulation killing cannot be performed due to the blockage. Therefore, a hole needs to be made in the tubing to meet the circulation killing requirements. Currently, the commonly used hole-making methods are mainly blasting hole-making and hydraulic hole-making. Blasting hole-making may damage the casing while perforating the tubing. Hydraulic hole-making has requirements on the inner diameter of the tubing and cannot be applied to some small-sized tubing. Therefore, it is necessary to invent a mechanical hole-making tool to achieve tubing hole-making mechanically. Summary of the Invention

[0003] The purpose of this invention is to provide a tubing tapping tool to solve the problems of casing damage during blast tapping and poor applicability of hydraulic tapping.

[0004] To solve the above-mentioned technical problems, the technical solution provided by the present invention is as follows:

[0005] The tubing tapping tool provided by this invention includes: a pressure rod, a transmission disc, a transmission pin, a driven pin, a tapping assembly, and an outer sleeve;

[0006] The pressure rod is inserted into the outer sleeve, and the pressure rod has a first through hole;

[0007] The transmission disc is disposed inside the outer casing;

[0008] The transmission pin is connected to the transmission disc and is slidably connected to the first through hole;

[0009] The driven pin is connected to the transmission disc;

[0010] The opening assembly has a second through hole, and the driven pin is slidably connected to the second through hole;

[0011] The pressure rod is movable relative to the outer sleeve, so that the transmission pin moves in the first through hole to drive the transmission disc to rotate, thereby causing the driven pin to push the opening assembly to extend or retract into the outer sleeve.

[0012] Furthermore, both the first through hole and the second through hole are configured as elongated holes;

[0013] The length direction of the first through hole is set at an angle to the radial direction of the transmission disk;

[0014] The length direction of the second through hole is perpendicular to the radial direction of the transmission disk.

[0015] Furthermore, the tubing tapping tool also includes a central shaft;

[0016] The two ends of the central shaft are fixed to the inner wall of the outer sleeve, and the central shaft passes through the transmission disk so that the transmission disk can rotate along the axial direction of the central shaft.

[0017] Furthermore, the opening assembly has a third through hole through which the central shaft passes to limit the extension or retraction length of the opening assembly.

[0018] Furthermore, the transmission disk includes two parallel, spaced-apart discs;

[0019] The opening assembly is located between the two disk components;

[0020] Both of the disc components are fitted onto the central shaft.

[0021] Furthermore, the tubing tapping tool also includes a positioning ball pin and a spring;

[0022] The pressure rod has an installation groove along a direction perpendicular to the inner wall of the outer sleeve. One end of the spring is connected to the bottom of the installation groove, and the other end of the spring is connected to the positioning ball pin. The spring is configured to enable the positioning ball pin to have a tendency to move tightly against the inner wall of the outer sleeve.

[0023] Furthermore, the inner wall of the outer casing has a positioning groove, and when the opening assembly is in the retracted state, the positioning ball pin extends into the positioning groove.

[0024] Furthermore, the tubing tapping tool also includes an upper pressure cap;

[0025] One end of the outer sleeve has an upper threaded section, and the upper pressure cap is threadedly connected to the upper threaded section.

[0026] Furthermore, the tubing tapping tool also includes a pressure cap;

[0027] The other end of the outer sleeve has a threaded section, and the lower pressure cap is threadedly connected to the threaded section.

[0028] Furthermore, the outer wall of the outer casing is provided with locking teeth.

[0029] In summary, the technical effects achieved by this invention are as follows:

[0030] The tubing tapping tool provided by this invention involves inserting a pressure rod into an outer sleeve. A transmission pin and a driven pin are connected to a transmission disc. The pressure rod is slidably connected to the transmission pin through a first through hole, and the tapping assembly is slidably connected to the driven pin through a second through hole. When the pressure rod continues to extend into the outer sleeve, the transmission pin moves in the first through hole, driving the transmission disc to rotate. This causes the driven pin to push the tapping assembly out of the outer sleeve, thereby squeezing the tubing and achieving tapping. When the pressure rod moves in the direction of being pulled out of the outer sleeve, the transmission pin moves in the first through hole, driving the transmission disc to rotate. This causes the driven pin to push the tapping assembly back into the outer sleeve, completing the tapping assembly reset. This process continues until all tapping operations are completed. Finally, the tapping tool is removed, completing the construction. The tubing tapping tool provided in this embodiment achieves tubing tapping mechanically, avoiding damage to the casing caused by explosive tapping and avoiding the size limitations and poor adaptability of hydraulic tapping tools. It solves the problems of casing damage from explosive tapping and poor applicability of hydraulic tapping. Attached Figure Description

[0031] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the internal structure of the tubing tapping tool provided in the embodiment of the present invention, in the retracted state of the tapping assembly.

[0033] Figure 2 This is a schematic diagram of the internal structure of the opening assembly in the extended state of the tubing opening tool provided in an embodiment of the present invention;

[0034] Figure 3 for Figure 1 The front view along direction A.

[0035] Icons: 1-Upper pressure cap; 2-Spring; 3-Positioning ball pin; 4-Pressure rod; 5-Transmission disc; 6-Transmission pin; 7-Center shaft; 8-Driven pin; 9-Opening assembly; 10-Outer sleeve; 11-Lower pressure cap. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the 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 invention without inventive effort are within the scope of protection of the invention.

[0038] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0039] like Figure 1 , Figure 2 , Figure 3 As shown, the tubing tapping tool provided in this embodiment includes: a pressure rod 4, a transmission disc 5, a transmission pin 6, a driven pin 8, a tapping assembly 9, and an outer sleeve 10. The pressure rod 4 is inserted into the outer sleeve 10. Specifically, the end of the pressure rod 4 that extends into the outer sleeve 10 is conical, and the other end of the pressure rod 4 extends out of the outer sleeve 10 and is connected to a vibrator. The vibrator drives the pressure rod 4 to move within the outer sleeve 10. The pressure rod 4 has a first through hole. The transmission pin 6 is connected to the transmission disc 5 and is slidably connected to the first through hole. When the pressure rod 4 moves within the outer sleeve 10, the transmission pin 6 is restricted by the first through hole and slides within the first through hole. The transmission disc 5 is located inside the outer sleeve 10, which allows the transmission disc 5 to rotate.

[0040] The driven pin 8 is connected to the transmission disk 5. The opening assembly 9 has a second through hole. The driven pin 8 is slidably connected to the second through hole. When the transmission disk 5 rotates, the driven pin 8 pushes the hole wall of the second through hole, which causes the driven pin 8 to push the opening assembly 9 to extend or retract into the outer sleeve 10.

[0041] The tubing tapping tool provided in this embodiment involves inserting a pressure rod 4 into an outer sleeve 10. A transmission pin 6 and a driven pin 8 are connected to a transmission disc 5. The pressure rod 4 is slidably connected to the transmission pin 6 through a first through hole, and the tapping assembly 9 is slidably connected to the driven pin 8 through a second through hole. When the pressure rod 4 continues to extend into the outer sleeve 10, the transmission pin 6 moves in the first through hole, causing the transmission disc 5 to rotate. This causes the driven pin 8 to push the tapping assembly 9 out of the outer sleeve 10, thereby squeezing the tubing and achieving tapping. When the pressure rod 4 is withdrawn from the outer sleeve 10... When the direction is moved, the transmission pin 6 moves in the first through hole, driving the transmission disc 5 to rotate, thereby causing the driven pin 8 to push the opening assembly 9 back into the outer sleeve 10, and the opening assembly 9 completes the reset until all opening operations are completed. Finally, the opening tool is removed to complete the construction. The tubing opening tool provided in this embodiment realizes tubing opening by mechanical means, avoiding damage to the casing caused by explosive opening, and avoiding the size limitation and poor adaptability of hydraulic opening tools. It solves the problems of casing damage caused by explosive opening and poor applicability of hydraulic opening.

[0042] Based on the above embodiments, the oil pipe tapping tool provided in this embodiment is further configured with elongated holes for both the first and second through holes in order to enable the transmission disk 5 to rotate and drive the tapping assembly 9 to extend or retract. The length direction of the first through hole is set at an angle to the radial direction of the transmission disk 5, so that when the pressure rod 4 moves inside the outer sleeve 10, it can drive the transmission disk 5 to rotate. The length direction of the second through hole is set perpendicular to the radial direction of the transmission disk 5, so that when the transmission disk 5 rotates, it can drive the tapping assembly 9 to extend out of or retract into the outer sleeve 10.

[0043] Furthermore, the tubing tapping tool also includes a central shaft 7; both ends of the central shaft 7 are fixed to the inner wall of the outer sleeve 10, and the central shaft 7 passes through the transmission disk 5 so that the transmission disk 5 can rotate along the axis of the central shaft 7. It should be noted that the central shaft 7 passes through the axial position of the transmission disk 5 so that the transmission disk 5 can rotate along its own axis; the transmission disk 5 includes two parallel and spaced disc components; the tapping assembly 9 is located between the two disc components; both disc components are sleeved on the central shaft 7.

[0044] It should be noted that both the drive pin 6 and the driven pin 8 are located between the two disc components and are connected to the inner surfaces of the two disc components respectively.

[0045] Furthermore, the opening assembly 9 has a third through hole through which the central shaft 7 passes to limit the extension or retraction length of the opening assembly 9.

[0046] Specifically, the cross-sectional shape of the opening assembly 9 is L-shaped, with... Figure 1 Taking the direction as an example, the second through hole is opened on the vertical side of the opening assembly 9, and the third through hole is opened on the horizontal side of the opening assembly 9. The third through hole is also a long hole structure. The central shaft 7 passes through the third through hole, allowing the opening assembly 9 to move freely in the length direction of the third through hole. The length of the third through hole restricts the movement path of the opening assembly 9.

[0047] Furthermore, the tubing tapping tool also includes a positioning ball pin 3 and a spring 2; the pressure rod 4 has an installation groove along a direction perpendicular to the inner wall of the outer sleeve 10, one end of the spring 2 is connected to the bottom of the installation groove, and the other end of the spring 2 is connected to the positioning ball pin 3. The spring 2 is specifically configured as a compression spring 2, which enables the positioning ball pin 3 to have a tendency to move tightly against the inner wall of the outer sleeve 10; the inner wall of the outer sleeve 10 has a positioning groove, and when the tapping assembly 9 is in the retracted state, the positioning ball pin 3 extends into the positioning groove.

[0048] Specifically, when the pressure rod 4 moves downward under force, the positioning ball pin 3 disengages from the positioning groove, the spring 2 is further compressed, and the positioning ball pin 3 moves close to the inner wall of the outer sleeve 10; when the opening assembly 9 retracts into the outer sleeve 10, the elastic force of the spring 2 causes the positioning ball pin 3 to extend into the positioning groove, locking the position of the pressure rod 4.

[0049] Furthermore, the tubing tapping tool also includes an upper pressure cap 1; one end of the outer sleeve 10 has an upper threaded section, and the upper pressure cap 1 is threadedly connected to the upper threaded section; the other end of the outer sleeve 10 has a lower threaded section, and the lower pressure cap 11 is threadedly connected to the lower threaded section.

[0050] Specifically, the outer casing 10 consists of two semi-cylindrical structures, which are installed together to form a cylinder. The two parts are fixed by the upper pressure cap 1 and the lower pressure cap 11.

[0051] Furthermore, the outer wall of the outer jacket 10 is provided with locking teeth to fix the position of the outer jacket 10.

[0052] The tubing tapping tool provided in this embodiment, when needed for tubing tapping, connects the tapping tool to a vibrator. A steel wire or cable is used to lower the tool to the tapping position, and the vibrator strikes downwards, causing the pressure rod 4 to move downwards. During this downward movement, the pressure rod 4, together with the outer sleeve 10, compresses the spring 2 and the positioning ball pin 3, causing them to retract and lose their positioning function. During this downward movement, the pressure rod 4 pushes the transmission pin 6 to rotate, which in turn drives the transmission disc 5 to rotate. The transmission disc 5, in turn, drives the driven pin 8 to rotate, which in turn pushes the tapping assembly 9 outwards. During this outward movement, the tapping assembly 9 first abuts against the inner wall of the tubing. At this point, the tapping assembly 9 and the locking teeth on the outer sleeve 10 work together to fix its position. Under the continuous tapping action of the vibrator, the pressure rod 4, transmission disc 5, transmission pin 6, and driven pin 8 move, thereby continuously squeezing the tubing with the tapping assembly 9. Finally, through continuous impact, the tubing is tapped. Figure 2 As shown, after the oil pipe is drilled, the upper impact of the vibrator drives the pressure rod 4, transmission disc 5, transmission pin 6, and driven pin 8 to move, thereby driving the drilling assembly 9 to reset. After the drilling assembly 9 is reset, the drilling tool is lifted, and the drilling operation continues according to the above operation until all drilling operations are completed. Finally, the drilling tool is lifted to complete the construction.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention 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; and these 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 the present invention.

Claims

1. A tubing tapping tool, characterized in that, include: Pressure bar (4), transmission disc (5), transmission pin (6), driven pin (8), opening assembly (9) and outer sleeve (10); The pressure rod (4) is inserted into the outer sleeve (10), and the pressure rod (4) has a first through hole; The transmission disc (5) is disposed inside the outer casing (10); The transmission pin (6) is connected to the transmission disk (5) and is slidably connected to the first through hole; The driven pin (8) is connected to the transmission disc (5); The opening assembly (9) has a second through hole, and the driven pin (8) is slidably connected to the second through hole; The pressure rod (4) can move relative to the outer sleeve (10) so that the transmission pin (6) moves in the first through hole to drive the transmission disk (5) to rotate, thereby causing the driven pin (8) to push the opening assembly (9) to extend or retract into the outer sleeve (10). The tubing tapping tool also includes a positioning ball pin (3) and a spring (2); The pressure rod (4) has an installation groove along the direction perpendicular to the inner wall of the outer sleeve (10). One end of the spring (2) is connected to the bottom of the installation groove, and the other end of the spring (2) is connected to the positioning ball pin (3). The spring (2) is configured to enable the positioning ball pin (3) to have a tendency to move close to the inner wall of the outer sleeve (10).

2. The tubing tapping tool according to claim 1, characterized in that, Both the first through hole and the second through hole are designed as elongated holes; The length direction of the first through hole is set at an angle to the radial direction of the transmission disk (5); The length direction of the second through hole is perpendicular to the radial direction of the transmission disk (5).

3. The tubing tapping tool according to claim 1, characterized in that, The tubing tapping tool also includes a central shaft (7); The two ends of the central shaft (7) are fixed on the inner wall of the outer sleeve (10). The central shaft (7) passes through the transmission disk (5) so that the transmission disk (5) can rotate along the axial direction of the central shaft (7).

4. The tubing tapping tool according to claim 3, characterized in that, The opening assembly (9) has a third through hole through which the central shaft (7) passes to limit the extension or retraction length of the opening assembly (9).

5. The tubing tapping tool according to claim 3, characterized in that, The transmission disk (5) includes two parallel, spaced-apart discs; The opening assembly (9) is located between the two disk components; Both of the disc components are fitted onto the central shaft (7).

6. The tubing tapping tool according to claim 1, characterized in that, The inner wall of the outer jacket (10) has a positioning groove, and when the opening assembly (9) is in the retracted state, the positioning ball pin (3) extends into the positioning groove.

7. The tubing tapping tool according to claim 1, characterized in that, The tubing tapping tool also includes an upper pressure cap (1); One end of the outer sleeve (10) has an upper threaded section, and the upper pressure cap (1) is threadedly connected to the upper threaded section.

8. The tubing tapping tool according to claim 7, characterized in that, The tubing tapping tool also includes a pressure cap (11); The other end of the outer sleeve (10) has a lower threaded section, and the lower pressure cap (11) is threadedly connected to the lower threaded section.

9. The tubing tapping tool according to any one of claims 1-8, characterized in that, The outer wall of the outer jacket (10) is provided with a locking tooth.

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