Oil pipe tapping tool

Abstract

The invention provides an oil pipe trepanning tool, and relates to the technical field of exploitation of unconventional oil and gas reservoirs such as petroleum and natural gas. According to the oil pipe trepanning tool, a pressing rod is inserted into an outer sleeve, a transmission pin and a driven pin are connected to a transmission disc, and the pressing rod is in sliding connection with the transmission pin through a first through hole; the perforating assembly is slidably connected with the driven pin through the second through hole, when the pressing rod continues to stretch into the outer sleeve, the transmission pin moves in the first through hole to drive the transmission disc to rotate, and therefore the driven pin pushes the perforating assembly to stretch out of the outer sleeve, an oil pipe is squeezed, perforating is achieved, and when the pressing rod moves in the direction of being pulled away from the outer sleeve, the transmission pin moves in the first through hole, and the transmission disc is driven to rotate. And the driving disc is driven to rotate, so that the driven pin pushes the trepanning assembly to retract into the outer sleeve, the trepanning assembly finishes resetting until all trepanning operations are finished, and finally, the trepanning tool is taken out to finish construction.

Description

Technical Field

[0001] The invention relates to the technical field of exploitation of unconventional oil and gas reservoirs such as petroleum and natural gas, and in particular to an oil pipe hole-opening tool. Background Art

[0002] When the oil pipe is blocked during the production of oil and gas wells, it will directly affect the normal production of the oil and gas wells. If the unblocking process cannot unblock the well, it is necessary to pull the tubing string for unblocking. Before pulling the tubing string, it is impossible to perform circulating well pressure due to the blockage of the tubing string. Therefore, before pulling the tubing string, it is necessary to drill holes in the oil pipe to meet the circulating well pressure requirements. Currently, the commonly used drilling methods mainly include blasting drilling, hydraulic drilling and the like. The blasting drilling method may damage the casing while shooting open the oil pipe. The hydraulic drilling method has requirements on the inner diameter of the oil pipe and cannot be used in some small-sized oil pipes. Therefore, it is necessary to invent a mechanical drilling tool to achieve drilling of the oil pipe by mechanical means. Summary of the invention

[0003] The object of the present invention is to provide an oil pipe hole opening tool to solve the problems of casing damage caused by blasting hole opening and poor applicability of hydraulic hole opening.

[0004] In order to solve the above technical problems, the technical solution provided by the present invention is:

[0005] The oil pipe hole opening tool provided by the present invention comprises: a pressure rod, a transmission plate, a transmission pin, a driven pin, a hole opening assembly and a jacket;

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

[0007] The transmission disc is arranged 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 is provided with a second through hole, and the driven pin is slidably connected to the second through hole;

[0011] The pressure rod can move relative to the outer sleeve, so that the transmission pin moves in the first through hole, thereby driving the transmission disk to rotate, and then the driven pin pushes the opening assembly to extend out or retract into the outer sleeve.

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

[0013] The length direction of the first through hole is arranged at an angle with the radial direction of the transmission plate;

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

[0015] Furthermore, the oil pipe opening tool also includes a central axis;

[0016] Both ends of the central shaft are fixed on the inner wall of the outer sleeve, and the central shaft passes through the transmission disc, so that the transmission disc can rotate along the axial direction of the central shaft.

[0017] Furthermore, the opening assembly is provided with a third through hole, and the central axis passes through the third through hole to limit the extension or retraction length of the opening assembly.

[0018] Further, the transmission disc comprises two disc members arranged in parallel and spaced apart;

[0019] The opening assembly is located between the two disc members;

[0020] The two disc members are both sleeved on the central shaft.

[0021] Furthermore, the oil pipe opening tool also includes a positioning spherical pin and a spring;

[0022] The pressure rod is provided with an installation groove in 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 movement tendency to closely adhere to the inner wall of the outer sleeve.

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

[0024] Furthermore, the oil pipe opening tool also includes an upper pressure cap;

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

[0026] Furthermore, the oil pipe opening tool also includes a push-down cap;

[0027] The other end of the outer sleeve is provided with a lower thread section, and the lower pressing cap is threadedly connected with the lower thread section.

[0028] Furthermore, the outer wall of the outer jacket is provided with slip teeth.

[0029] Based on the above technical solutions, the technical effects that can be achieved by the present invention are:

[0030] The oil pipe drilling tool provided by the present invention is characterized in that a pressure rod is inserted into an outer sleeve, a transmission pin and a driven pin are connected to the transmission disk, the pressure rod is slidably connected to the transmission pin through a first through hole, and the drilling 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 disk to rotate, so that the driven pin pushes the drilling assembly to extend out of the outer sleeve, and then squeezes the oil pipe to achieve drilling. When the pressure rod moves in the direction of withdrawing from the outer sleeve, the transmission pin moves in the first through hole, driving the transmission disk to rotate, so that the driven pin pushes the drilling assembly to retract into the outer sleeve, and the drilling assembly is reset until all drilling operations are completed, and finally the drilling tool is put out to complete the construction. The oil pipe drilling tool provided in this embodiment realizes drilling of the oil pipe by mechanical means, avoids damage to the casing by blasting drilling, avoids size limitation and poor adaptability of the hydraulic drilling tool, and solves the problems of damage to the casing by blasting drilling and poor applicability of hydraulic drilling. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 A schematic diagram of the internal structure of the hole-opening assembly in the oil pipe hole-opening tool provided by an embodiment of the present invention in a retracted state;

[0033] Figure 2 A schematic diagram of the internal structure of the hole-opening assembly in the oil pipe hole-opening tool provided by an embodiment of the present invention in an extended state;

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

[0035] Icons: 1-upper pressure cap; 2-spring; 3-positioning ball pin; 4-pressure rod; 5-transmission plate; 6-transmission pin; 7-center shaft; 8-driven pin; 9-opening assembly; 10-outer sleeve; 11-lower pressure cap. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0037] 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 invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0039] like Figure 1 , Figure 2 , Figure 3 As shown, the oil pipe hole opening tool provided in this embodiment includes: a pressure rod 4, a transmission plate 5, a transmission pin 6, a driven pin 8, a hole opening assembly 9 and a sleeve 10; the pressure rod 4 is inserted in the sleeve 10, specifically, the end of the pressure rod 4 extending into the sleeve 10 is conical, and the other end of the pressure rod 4 extends out of the sleeve 10 and is connected to the jar, and the jar drives the pressure rod 4 to move in the sleeve 10, and the pressure rod 4 is provided with a first through hole, and the transmission pin 6 is connected to the transmission plate 5 and is slidably connected to the first through hole, so that when the pressure rod 4 moves in the sleeve 10, the transmission pin 6 is restricted by the first through hole, and the transmission pin 6 slides in the first through hole, and the transmission plate 5 is arranged inside the sleeve 10, so that the transmission plate 5 can be rotated.

[0040] The driven pin 8 is connected to the transmission disk 5, and the opening assembly 9 is provided with 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, so that the driven pin 8 pushes the opening assembly 9 to extend or retract into the outer sleeve 10.

[0041] The oil pipe hole opening tool provided in this embodiment is that the pressure rod 4 is inserted into the outer sleeve 10, and the transmission pin 6 and the driven pin 8 are connected to the transmission disk 5. The pressure rod 4 is slidably connected with the transmission pin 6 through the first through hole, and the hole opening assembly 9 is slidably connected with the driven pin 8 through the 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, driving the transmission disk 5 to rotate, so that the driven pin 8 pushes the hole opening assembly 9 out of the outer sleeve 10, thereby squeezing the oil pipe to achieve the hole opening. When the pressure rod 4 is pulled away from the outer sleeve 10, the oil pipe is opened. When the hole is opened, the driving pin 6 moves in the first through hole, driving the driving plate 5 to rotate, so that the driven pin 8 pushes the hole opening assembly 9 to retract the outer sleeve 10, and the hole opening assembly 9 is reset until all the hole opening operations are completed. Finally, the hole opening tool is brought out to complete the construction. The oil pipe hole opening tool provided in this embodiment realizes the oil pipe hole opening by mechanical means, avoids the damage of the casing by blasting hole opening, avoids the size limitation and poor adaptability of the hydraulic hole opening tool, and solves the problems of casing damage by blasting hole opening and poor applicability of hydraulic hole opening.

[0042] On the basis of the above embodiments, further, the oil pipe hole opening tool provided in this embodiment, in order to enable the transmission disk 5 to rotate and drive the hole opening assembly 9 to extend or retract, the first through hole and the second through hole are both configured as long strip holes; the length direction of the first through hole is configured at an angle to the radial direction of the transmission disk 5, so that when the pressure rod 4 moves in the outer sleeve 10, it can drive the transmission disk 5 to rotate; the length direction of the second through hole is configured perpendicularly to the radial direction of the transmission disk 5, so that when the transmission disk 5 rotates, it can drive the hole opening assembly 9 to extend out of the outer sleeve 10 or retract into the outer sleeve 10.

[0043] Furthermore, the oil pipe hole opening tool also includes a center shaft 7; both ends of the center shaft 7 are fixed on the inner wall of the outer sleeve 10, and the center shaft 7 passes through the transmission plate 5 so that the transmission plate 5 can rotate along the axial direction of the center shaft 7, and it should be noted that the center shaft 7 passes through the axial position of the transmission plate 5 so that the transmission plate 5 can rotate along its own axial direction; the transmission plate 5 includes two parallel and spaced disc parts; the hole opening assembly 9 is located between the two disc parts; the two disc parts are both mounted on the center shaft 7.

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

[0045] Furthermore, the opening assembly 9 is provided with a third through hole, and the central axis 7 passes through the third through hole 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. Figure 1 Taking the direction as an example, the second through hole is opened on the vertical edge of the opening assembly 9, and the third through hole is opened on the horizontal edge of the opening assembly 9. The third through hole is also a long hole structure. The center axis 7 passes through the third through hole, so that the opening assembly 9 can move freely in the length direction of the third through hole. The length of the third through hole limits the movement path of the opening assembly 9.

[0047] Furthermore, the oil pipe hole opening tool also includes a positioning ball pin 3 and a spring 2; the pressure rod 4 is provided with an installation groove in 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, and the spring 2 is specifically configured as a compression spring 2, and the spring 2 can make the positioning ball pin 3 have a movement tendency to be closely attached to the inner wall of the outer sleeve 10; the inner wall of the outer sleeve 10 has a positioning groove, and when the hole opening assembly 9 is in a retracted state, the positioning ball pin 3 extends into the positioning groove.

[0048] Specifically, when the pressure rod 4 is forced to move downward, 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 is retracted 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 oil pipe opening 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 sleeve 10 is composed of two semi-cylindrical structures, and the two parts are installed together to form a cylinder, and the two parts are fixed by an upper pressing cap 1 and a lower pressing cap 11.

[0051] Furthermore, the outer wall of the outer jacket 10 is provided with a slip tooth, which can fix the position of the outer jacket 10.

[0052] The oil pipe drilling tool provided in the present embodiment, when it is necessary to drill a hole in the oil pipe, the drilling tool is connected to the jar, and the tool is lowered to the drilling position by using a steel wire or a cable, and the jar is used to perform downward jarring, thereby driving the pressure rod 4 to move downward. During the downward movement, the pressure rod 4 and the outer sleeve 10 jointly squeeze the spring 2 and the positioning spherical pin 3 to make them retract, so that they lose their positioning function. During the downward movement, the pressure rod 4 pushes the transmission pin 6 to rotate, and the transmission pin 6 drives the transmission disk 5 to rotate during the rotation. The transmission disk 5 drives the driven pin 8 to rotate during the rotation. The driven pin 8 pushes the drilling assembly 9 to move outward during the rotation. During the outward movement, the drilling assembly 9 first abuts against the inner wall of the oil pipe. At this time, the drilling assembly 9 and the slip teeth on the outer sleeve 10 work together to fix the position. Under the continuous jarring action of the jar, the pressure rod 4, the transmission disk 5, the transmission pin 6, and the driven pin 8 are driven to move, so that the drilling assembly 9 continuously squeezes the oil pipe, and finally, the oil pipe drilling is achieved under continuous impact, such as Figure 2 As shown, after the oil pipe is drilled, the pressure rod 4, the transmission plate 5, the transmission pin 6, and the driven pin 8 are driven to move through the upward shock of the jar, thereby driving the drilling assembly 9 to reset. After the drilling assembly 9 is reset, the drilling tool is lifted up, and the drilling operation is continued according to the above operation until all the drilling operations are completed. Finally, the drilling tool is lifted up 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, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements 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 hole opening tool, characterized in that: include: A pressure rod (4), a transmission plate (5), a transmission pin (6), a driven pin (8), an opening assembly (9) and a jacket (10); The pressure rod (4) is inserted into the outer sleeve (10), and the pressure rod (4) is provided with a first through hole; The transmission disc (5) is arranged inside the outer casing (10); The transmission pin (6) is connected to the transmission plate (5) and is slidably connected to the first through hole; The driven pin (8) is connected to the transmission plate (5); The opening assembly (9) is provided with 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, thereby driving the transmission plate (5) to rotate, and then the driven pin (8) pushes the opening assembly (9) to extend out or retract into the outer sleeve (10).

2. The oil pipe opening tool according to claim 1, characterized in that: The first through hole and the second through hole are both configured as elongated holes; The length direction of the first through hole is arranged at an angle to the radial direction of the transmission plate (5); The length direction of the second through hole is arranged perpendicular to the radial direction of the transmission plate (5).

3. The oil pipe hole opening tool according to claim 1, characterized in that: The oil pipe opening tool also includes a central shaft (7); Both ends of the central shaft (7) are fixed on the inner wall of the outer sleeve (10), and the central shaft (7) passes through the transmission disc (5) so that the transmission disc (5) can rotate along the axial direction of the central shaft (7).

4. The oil pipe hole opening tool according to claim 3, characterized in that: The opening assembly (9) is provided with a third through hole, and the central axis (7) passes through the third through hole to limit the extension or retraction length of the opening assembly (9).

5. The oil pipe opening tool according to claim 3, characterized in that: The transmission disc (5) comprises two circular discs arranged in parallel and at intervals; The opening assembly (9) is located between the two disc members; The two disc members are both sleeved on the central shaft (7).

6. The oil pipe opening tool according to claim 1, characterized in that: The oil pipe opening tool also includes a positioning spherical pin (3) and a spring (2); The pressure rod (4) is provided with a mounting groove in 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 mounting groove; 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 movement tendency to be closely attached to the inner wall of the outer sleeve (10).

7. The oil pipe hole opening tool according to claim 6, characterized in that: The inner wall of the outer sleeve (10) has a positioning groove, and when the opening assembly (9) is in a retracted state, the positioning spherical pin (3) extends into the positioning groove.

8. The oil pipe opening tool according to claim 1, characterized in that: The oil pipe opening tool also includes an upper pressure cap (1); One end of the outer sleeve (10) is provided with an upper threaded section, and the upper pressure cap (1) is threadedly connected to the upper threaded section.

9. The oil pipe opening tool according to claim 8, characterized in that: The oil pipe opening tool also includes a pressing cap (11); The other end of the outer sleeve (10) has a lower threaded section, and the lower pressing cap (11) is threadedly connected to the lower threaded section.

10. The oil pipe hole opening tool according to any one of claims 1 to 9, characterized in that: The outer wall of the outer jacket (10) is provided with slip teeth.

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