A hydraulic detonating device for tubing conveyed perforation

Abstract

This invention discloses a hydraulic detonation device for tubing-delivered perforation, relating to the field of drilling perforation technology. It aims to solve the technical problem of low functionality in hydraulic detonation devices for tubing-delivered perforation. The device includes a tubing mechanism, a connecting module, a hydraulic rotation module, a rotation locking module, a lower connector, a hydraulic detonation module, a detonator, a perforation gun, and a rod. This invention uses hydraulic pressure to lower the piston ring, causing the rotating annulus to rotate. This reduces the pressure in the lower compartment and increases it until it equalizes with the hydraulic pressure in the upper compartment, adjusting the rotation angle of the rotating annulus. The rotation locking module provides additional limiting for the hydraulic detonation module in the initial state. Combined with the rod-triggered release mechanism, this forms a secondary safety system. The rod's descent triggers the rotation locking module, simultaneously locking the rotating annulus and releasing the additional limiting on the hydraulic detonation module. This effectively prevents premature detonation risks caused by complex downhole conditions, meeting the requirements for efficient, precise, and safe operation.

Description

Technical Field

[0001] This invention relates to the field of drilling perforation technology, and more specifically, to a hydraulic detonation device for tubing delivery perforation. Background Technology

[0002] Tubing-delivered perforation technology is widely used in well completion operations for oil and gas wells. Its core is to deliver a perforation gun string to the target formation through tubing, and then detonate the perforation projectile through a detonation device to form a channel connecting the wellbore and the formation. Hydraulic detonation devices have become one of the mainstream technologies in this field due to their relatively safe operation and high reliability.

[0003] Traditional hydraulic detonation devices for tubing-delivered perforation rely on a surface pump truck applying hydraulic pressure through the tubing string. When the pressure reaches a preset value, a shear pin inside the device breaks, releasing a firing pin that strikes a detonator, thus detonating the perforating gun. However, with the development of drilling technology towards complex conditions such as deep, ultra-deep, and extended-range horizontal wells, the inherent functional limitations of these devices have become increasingly apparent. They struggle to meet the demands for efficient, precise, and safe operations. This is primarily manifested in the separation and lack of effective coordination between key functions such as perforation azimuth adjustment, mechanical locking, and explosion-proof safety. This results in cumbersome operating procedures, poor coordination, and an inability to balance operational accuracy with efficiency and system safety, leading to a severe overall functional deficiency. Therefore, we propose a hydraulic detonation device for tubing-delivered perforation. Summary of the Invention

[0004] The purpose of this invention is to provide a hydraulic detonation device for tubing perforation, so as to solve the technical problem of low functionality of hydraulic detonation devices for tubing perforation.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a hydraulic detonation device for tubing conveying perforation, comprising a tubing mechanism, a connecting module, a hydraulic rotation module, a rotation locking module, a lower connector, a hydraulic detonation module, a detonator, a perforation gun, and a rod. The connecting module includes a column at the bottom end of the tubing mechanism, a sliding cavity formed within the column, and a plurality of through holes communicating with the sliding cavity in an annular, equally spaced structure at the top end of the column. The hydraulic rotation module includes a rotating ring tube and a piston ring. The rotating ring tube is disposed on the sliding cavity, and the piston ring is slidably disposed within the sliding cavity. The inner surface of the piston ring is movably connected to the rotating ring tube. The bottom end of the piston ring, the sliding cavity, and the... The lower cavity formed by the gap of the rotating annular tube is filled with gas. The piston ring slides along the sliding cavity under hydraulic force and drives the rotating annular tube to rotate. The rotating locking module is located on the rotating annular tube. The lower connector is located at the bottom of the connecting module and is fixedly connected to the rotating annular tube. The hydraulic detonation module is located inside the rotating annular tube. The rotating locking module provides additional limiting for the hydraulic detonation module in the initial state. The detonator is fixed on the lower connector. The perforating gun is threadedly connected to the lower threaded tube. The rod can be dropped along the oil pipe mechanism. When the rod falls, it can trigger the rotating locking module to lock the rotating annular tube and simultaneously release the additional limiting for the hydraulic detonation module. This invention utilizes the coordination of a tubing mechanism, a connecting module, and a hydraulic rotation module. Liquid is supplied to the tubing mechanism via a perforation pump, causing the piston rings to descend and the rotating annular tube to rotate. This reduces the pressure in the lower compartment and increases it until it equalizes with the hydraulic pressure in the upper compartment. The perforation pump then controls the hydraulic pressure of the tubing mechanism to adjust the rotation angle of the rotating annular tube, solving the problems of existing technologies requiring ground-based tubing rotation, cumbersome operation, and insufficient precision. The falling rod triggers the rotation locking module, simultaneously locking the rotating annular tube and releasing the additional limit on the hydraulic detonation module. This structural linkage ensures reliable operation, simplifies the process, and improves efficiency and safety while maintaining a fixed perforation orientation. The rotation locking module provides additional limits to the hydraulic detonation module in the initial state, and combined with the rod-triggered release mechanism, forms a secondary safety mechanism, effectively preventing premature detonation risks caused by complex downhole conditions. This improves system reliability and safety, meeting the requirements for efficient, precise, and safe operation, and solving the technical problem of low functionality in tubing-delivered hydraulic detonation devices for perforation.

[0006] Preferably, the tubing mechanism includes a branch pipe A and several branch pipes B, the branch pipe A and the branch pipe B are threaded together, any two branch pipes B are threaded together, the surface of the branch pipe A at the top is provided with a threaded groove, the bottom of the threaded groove is provided with a rod-throwing groove, and a sleeve is threadedly connected to the threaded groove.

[0007] Preferably, both ends of the column are provided with rotating holes that communicate with the sliding cavity, and the top of the column is fixed with an upper threaded tube. The upper threaded tube is threadedly engaged with the bottom end of the branch pipe B. The surface of the rotating hole at the top is provided with several snap-fit ​​grooves in an annular, equally spaced structure.

[0008] Preferably, the two ends of the rotating ring tube are rotatably connected to the two rotating holes respectively, and the surface of the rotating ring tube has a plurality of threaded guide grooves in an annular equally spaced structure. The inner surface of the piston ring has a plurality of threaded protrusions in an annular equally spaced structure, and the plurality of threaded protrusions are movably connected to the plurality of threaded guide grooves respectively.

[0009] Preferably, the top of the rotating ring tube is provided with a top sliding groove, the outer surface of the top of the rotating ring tube is provided with an outer sliding groove communicating with the top sliding groove, and the inner surface of the top of the rotating ring tube is provided with an inner sliding groove communicating with the outer sliding groove.

[0010] Preferably, the rotation locking module includes a snap-fit ​​slider, a plug-in slide plate, and a top slider. The snap-fit ​​slider is slidably disposed on the outer slide groove. A plurality of snap-fit ​​protrusions are uniformly fixed on the outer surface of the snap-fit ​​slider. The snap-fit ​​protrusions engage with the snap-fit ​​grooves. The snap-fit ​​slider and the outer slide groove are elastically connected by at least one spring. The plug-in slide plate is slidably disposed on the outer slide groove and fixedly connected to the snap-fit ​​slider. The top slider is slidably disposed on the top slide groove. The top slider extends out of the top slide groove and is fixedly provided with a guide block.

[0011] Preferably, the lower connector includes a connecting ring block, which is disposed at the bottom end of the column. The bottom end of the rotating ring tube passes through the rotating hole located at the bottom end and is fixedly connected to the connecting ring block. The detonator is fixed to the inner surface of the connecting ring block. A lower threaded tube is fixed at the bottom end of the connecting ring block. The perforating gun is threadedly connected to the lower threaded tube. The bottom end of the detonator is connected to the detonating cord of the perforating gun.

[0012] Preferably, the hydraulic detonation module includes an inner piston and a firing pin. The inner piston is movably disposed within the rotating ring tube, and the inner piston and the rotating ring tube are fixedly connected by a shear pin. The firing pin is fixedly disposed at the bottom end of the inner piston.

[0013] Preferably, the inner piston has a ball notch at its top end, and the inner piston surface has a plurality of slots in an annular, equally spaced structure, with the plurality of insertion slides respectively engaging with the plurality of slots.

[0014] Preferably, all of the guide blocks are movably fitted with the rod body. The rod body includes a column block adapted to the cavity of the branch pipe B. Both ends of the column block are spherical. The column block has a plurality of vertical holes A in an annular, equally spaced structure. A guide shaft is fixed at the bottom end of the rod body. A vertical hole B is opened on the guide shaft. The vertical hole B extends into the column block and communicates with the top end of the column block.

[0015] The beneficial effects of this invention are:

[0016] This invention utilizes the cooperation of an oil pipe mechanism, a connecting module, and a hydraulic rotation module. Liquid is input into the oil pipe mechanism via a perforation pump truck. The hydraulic pressure causes the piston ring to descend, which in turn causes the rotating ring tube to rotate. This causes the lower diaphragm to shrink and the air pressure to increase until it equals the hydraulic pressure in the upper diaphragm. Thus, the rotation angle of the rotating ring tube is adjusted by controlling the hydraulic pressure of the oil pipe mechanism through the perforation pump truck. This solves the problems of the prior art, which requires rotating the tubing on the ground, is cumbersome to operate, and lacks precision.

[0017] The action of the rotating locking module is triggered by the falling of the rod, which simultaneously locks the rotating ring tube and releases the additional limit on the hydraulic detonation module. The structure is reliable and the operation process is simplified while ensuring the fixed position of the perforation hole, thus improving the efficiency and safety of the operation.

[0018] By providing additional limits to the hydraulic detonation module in the initial state through the rotation locking module, and combined with the rod trigger release mechanism, a secondary safety is formed, which effectively prevents the risk of premature detonation caused by complex downhole working conditions, improves the reliability and safety of the system, and thus meets the requirements of efficient, accurate and safe operation, and solves the technical problem of low functionality of hydraulic detonation devices for tubing perforation. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the branch pipe B structure of the present invention;

[0021] Figure 3 This is a schematic diagram of the structure of pipe A in this invention;

[0022] Figure 4 This is a schematic diagram of the rod body of the present invention;

[0023] Figure 5 This is a partial structural schematic diagram of the present invention;

[0024] Figure 6 This is a partial structural cross-sectional schematic diagram of the present invention;

[0025] Figure 7This is a first cross-sectional structural diagram of the connection module, hydraulic rotation module, rotation locking module, lower connector, hydraulic detonation module and detonator of the present invention.

[0026] Figure 8 This is a second cross-sectional structural diagram of the connection module, hydraulic rotation module, rotation locking module, lower connector, hydraulic detonation module and detonator of the present invention.

[0027] Figure 9 This is a cross-sectional structural diagram of the connection module of the present invention;

[0028] Figure 10 This is a schematic diagram showing the disassembled structure of the hydraulic rotation module, rotation locking module, and hydraulic detonation module of the present invention.

[0029] Figure 11 This is a schematic diagram showing the disassembled structure of the hydraulic rotary module and rotary locking module of the present invention;

[0030] Figure 12 This is a schematic cross-sectional view of part of the structure of the present invention after the rod is thrown;

[0031] Figure 13 for Figure 12 An enlarged schematic diagram of the structure of part A.

[0032] Explanation of the labels in the diagram:

[0033] 1. Oil pipe mechanism; 2. Connecting module; 3. Hydraulic rotation module; 4. Rotation locking module; 5. Lower connector; 6. Hydraulic detonation module; 7. Detonator; 8. Perforation gun; 9. Rod body;

[0034] 11. Pipe A; 12. Pipe B; 13. Threaded groove; 14. Rod through groove; 15. Sleeve;

[0035] 21. Column; 22. Sliding cavity; 23. Rotating hole; 24. Through hole; 25. Threaded tube; 26. Snap-fit ​​groove;

[0036] 31. Rotary ring tube; 32. Threaded guide groove; 33. Piston ring; 34. Threaded protrusion;

[0037] 311. Top groove; 312. Outer groove; 313. Inner groove;

[0038] 40. Snap-fit ​​protrusion; 41. Snap-fit ​​slider; 42. Spring; 43. Insert-fit slide plate; 44. Top slider; 45. Guide block;

[0039] 51. Connecting ring block; 52. Threaded pipe;

[0040] 61. Inner piston; 62. Shear pin; 63. Firing pin;

[0041] 611. Ball notch; 612. Slot;

[0042] 91. Column block; 92. Vertical hole A; 93. Guide shaft; 94. Vertical hole B. Detailed Implementation

[0043] like Figures 1 to 13 As shown, the present invention relates to a hydraulic detonation device for perforation of oil pipe, comprising an oil pipe mechanism 1, a connecting module 2, a hydraulic rotation module 3, a rotation locking module 4, a lower connector 5, a hydraulic detonation module 6, a detonator 7, a perforation gun 8, and a rod body 9.

[0044] In embodiments of the present invention, such as Figure 1 , Figure 2 and Figure 3 As shown, the tubing mechanism 1 includes a branch pipe A11 and several branch pipes B12. Branch pipe A11 and branch pipes B12 are threaded together, and any two branch pipes B12 are threaded together. A threaded groove 13 is formed on the surface of the branch pipe A11 at the top, and a rod-throwing groove 14 is formed at the bottom of the threaded groove 13. A sleeve 15 is threadedly connected to the threaded groove 13. This invention sets the tubing mechanism 1 into a modular structure. In use, several branch pipes B12 and branch pipe A11 are sequentially threaded together to form a continuous tubing string. Branch pipe A11 is set on the ground and connected to the perforation pump truck. Rotating the sleeve 15 allows the sleeve 15 to move in the threaded groove 13, thereby causing the sleeve 15 to shift relative to the rod-throwing groove 14. When the sleeve 15 is disengaged from the rod-throwing groove 14, it is used for rod throwing. When the sleeve 15 covers the rod-throwing groove 14 to form a sealed structure, liquid can be injected.

[0045] In embodiments of the present invention, such as Figure 1 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 12 and Figure 13 As shown, the connecting module 2 is located at the bottom of the tubing mechanism 1. Specifically, the connecting module 2 includes a column 21, with a sliding cavity 22 inside the column 21. Rotating holes 23 communicating with the sliding cavity 22 are provided at both ends of the column 21. The top of the column 21 has several through holes 24 communicating with the sliding cavity 22 in an annular, equally spaced structure. An upper threaded tube 25 is fixed to the top of the column 21, and the upper threaded tube 25 is threadedly engaged with the bottom end of the branch pipe B12. In use, the connecting module 2 of this invention connects the upper threaded tube 25 to the bottom end of one of the branch pipes B12.

[0046] In embodiments of the present invention, such as Figure 9 As shown, the rotating hole 23 at the top has a ring-shaped, equally spaced structure with several snap-fit ​​grooves 26 on its surface.

[0047] In embodiments of the present invention, such as Figure 6 , Figure 7 , Figure 8 , Figure 10 and Figure 2 As shown, the hydraulic rotary module 3 includes a rotary annular tube 31 and a piston ring 33. The rotary annular tube 31 is disposed on the sliding cavity 22, and its two ends are rotatably connected to two rotating holes 23 respectively. The surface of the rotary annular tube 31 has a plurality of threaded guide grooves 32 with an annular and equally spaced structure. The piston ring 33 is slidably disposed in the sliding cavity 22, and its inner surface is movably connected to the rotary annular tube 31. The inner surface of the piston ring 33 has a plurality of threaded protrusions 34 with an annular and equally spaced structure, and the plurality of threaded protrusions 34 are movably connected to the plurality of threaded guide grooves 32 respectively. The top end of the piston ring 33, the gap between the sliding cavity 22 and the rotary annular tube 31 form an upper partition cavity, and the bottom end of the piston ring 33, the gap between the sliding cavity 22 and the rotary annular tube 31 form a lower partition cavity, which is filled with gas. The present invention, through the structural design of the hydraulic rotating module 3, enables the upper diaphragm to be connected to the oil pipe mechanism 1 through several through holes 24. Liquid is input into the oil pipe mechanism 1 by a perforation pump, and the hydraulic pressure causes the piston ring 33 to descend. The threaded protrusion 34 moves relative to the threaded guide groove 32, causing the rotating ring tube 31 to rotate. This causes the lower diaphragm to shrink and the air pressure to increase until it is equal to the hydraulic pressure of the upper diaphragm. Thus, the rotation angle of the rotating ring tube 31 is adjusted by controlling the hydraulic pressure of the oil pipe mechanism 1 through the perforation pump.

[0048] In embodiments of the present invention, such as Figure 6 , Figure 7 , Figure 8 , Figure 10 and Figure 11 As shown, the top of the rotating ring tube 31 is provided with a top sliding groove 311, the outer surface of the top of the rotating ring tube 31 is provided with an outer sliding groove 312 communicating with the top sliding groove 311, and the inner surface of the top of the rotating ring tube 31 is provided with an inner sliding groove 313 communicating with the outer sliding groove 312.

[0049] In embodiments of the present invention, such as Figure 6 , Figure 7 , Figure 8 , Figure 10 , Figure 12 and Figure 13As shown, the rotary locking module 4 is mounted on the rotary annular tube 31. Specifically, the rotary locking module 4 includes a snap-fit ​​slider 41, a plug-in slide plate 43, and a top slider 44. The snap-fit ​​slider 41 is slidably mounted on the outer slide groove 312. A plurality of snap-fit ​​protrusions 40 are uniformly fixed on the outer surface of the snap-fit ​​slider 41. The snap-fit ​​protrusions 40 engage with the snap-fit ​​grooves 26. The snap-fit ​​slider 41 and the outer slide groove 312 are elastically connected by at least one spring 42. The plug-in slide plate 43 is slidably mounted on the outer slide groove 312 and fixedly connected to the snap-fit ​​slider 41. The top slider 44 is slidably mounted on the top slide groove 311. The top slider 44 extends out of the top slide groove 311 and is fixedly mounted with a guide block 45. Through the structural design of the rotary locking module 4, the present invention ensures that, in the initial state, the snap-fit ​​slider 41 and the snap-fit ​​protrusions 40 are located within the outer slide groove 312, and the centripetal end of the plug-in slide plate 43 extends out of the outer slide groove 312.

[0050] In embodiments of the present invention, such as Figure 1 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Figure 12 As shown, the lower connector 5 includes a connecting ring block 51, which is located at the bottom end of the column 21. The bottom end of the rotating ring tube 31 passes through the rotating hole 23 located at the bottom end and is fixedly connected to the connecting ring block 51. The bottom end of the connecting ring block 51 is fixedly provided with a lower threaded tube 52.

[0051] In embodiments of the present invention, such as Figure 7 , Figure 8 , Figure 10 , Figure 12 and Figure 13 As shown, the hydraulic detonation module 6 includes an inner piston 61 and a firing pin 63. The inner piston 61 is movably disposed within the rotating ring tube 31, and the inner piston 61 and the rotating ring tube 31 are fixedly connected by a shear pin 62. The firing pin 63 is fixedly disposed at the bottom end of the inner piston 61. Through the structural design of the hydraulic detonation module 6, this invention maintains the relative static state between the inner piston 61 and the rotating ring tube 31 when the hydraulic thrust within the oil pipe mechanism 1 does not reach a threshold. When the hydraulic thrust within the oil pipe mechanism 1 increases to exceed the threshold, the shear pin 62 undergoes shearing fracture, releasing the limiting constraint on the inner piston 61, allowing the inner piston 61 to move linearly downward along the rotating ring tube 31 under hydraulic drive, with the firing pin 63 moving synchronously accordingly.

[0052] In embodiments of the present invention, such as Figure 10 and Figure 13As shown, the inner piston 61 has a spherical notch 611 at its top end, and a number of slots 612 are formed in an annular, equally spaced structure on its surface. A number of insertion sliding plates 43 are respectively inserted into and engaged with the slots 612. Through this arrangement, in the initial state, the insertion sliding plates 43 are engaged with the slots 612, providing further limiting constraints on the inner piston 61. This reduces the load on the shear pin 62 from bearing the hydraulic thrust alone during perforation operations, preventing accidental fatigue or premature breakage of the shear pin 62 due to complex downhole conditions, and thus preventing the risk of premature explosion caused by malfunction of the inner piston 61.

[0053] In embodiments of the present invention, such as Figure 7 , Figure 8 and Figure 12 As shown, the detonator 7 is fixed to the inner surface of the connecting ring block 51. Through the above design, the present invention ensures that when the firing pin 63 descends, it strikes the top of the detonator 7, detonating the detonator 7.

[0054] In embodiments of the present invention, such as Figure 1 , Figure 5 and Figure 6 As shown, the perforating gun 8 is threadedly connected to the lower threaded tube 52, and the bottom end of the detonator 7 is connected to the detonating cord of the perforating gun 8.

[0055] In embodiments of the present invention, such as 3, Figure 4 , Figure 12 and Figure 13 As shown, several guide blocks 45 are movably fitted with the rod body 9. The rod body 9 includes a column block 91 adapted to the cavity of the branch pipe B12. Both ends of the column block 91 are spherical structures. Several vertical holes A92 are opened on the column block 91 in an annular and equally spaced structure. A guide shaft 93 is fixed at the bottom end of the rod body 9. A vertical hole B94 is opened on the guide shaft 93. The vertical hole B94 extends into the column block 91 and communicates with the top end of the column block 91. Through the above-described configuration, this invention allows the perforating gun 8 to be inserted into a suitable position. The rotation angle of the rotating ring pipe 31 is adjusted by controlling the hydraulic pressure of the oil pipe mechanism 1 via the perforating pump truck. This causes the lower connector 5, hydraulic detonation module 6, detonator 7, and perforating gun 8 to rotate until the perforating gun 8 reaches the appropriate angle. Then, the rotating sleeve 15 disengages from the rod-throwing groove 14, allowing the rod 9 to be inserted. The rod 9 slides down into the liquid within the oil pipe mechanism 1, undergoes an initial velocity change, and descends at a uniform speed until it reaches the guide shaft 93 and several guide blocks 45. Contact causes the guide block 45 to shift along the eccentric direction. The locking protrusion 40 slides out of the outer groove 312 along with the locking slider 41 and locks with the locking groove 26. The guide shaft 93 continues to descend into the cavity formed by several guide blocks 45, limiting the guide blocks 45 until the rotating ring tube 31 can no longer rotate, locking the angle of the perforating gun 8. At this time, the insertion slide plate 43 disengages from the slot 612, releasing the secondary limiting protection of the inner piston 61. The rotating sleeve 15 covers the throwing rod through groove 14 and re-forms a sealing structure.

[0056] Working principle: This embodiment provides a hydraulic detonation device for tubing delivery perforation. In use, the upper threaded pipe 25 of the connecting module 2 is threadedly fixed to the bottom end of one of the branch pipes B12. Starting with the branch pipe B12, several branch pipes B12 are sequentially sent down into the well and threadedly fixed. Then, the branch pipe A11 is placed on the ground and threadedly connected to the uppermost branch pipe B12 to form a continuous tubing string. The branch pipe A11 is connected to the perforation pump truck.

[0057] Hydraulic rotation angle adjustment: Liquid is injected into the oil pipe mechanism 1 through the perforation pump truck. The liquid enters the upper partition cavity through the through hole 24, pushing the piston ring 33 to move downward. The threaded protrusion 34 on the inner surface of the piston ring 33 moves along the threaded guide groove 32 on the rotating ring tube 31, causing the rotating ring tube 31 to rotate. The rotating ring tube 31 drives the lower connector 5, hydraulic detonation module 6, detonator 7 and perforation gun 8 to rotate as a whole through the connecting ring block 51 until the perforation gun 8 is adjusted to the predetermined perforation position.

[0058] Angle locking: Rotate the sleeve 15 to disengage it from the bar-throwing groove 14, and insert the bar 9 from the bar-throwing groove 14. The bar 9 falls uniformly in the liquid column, and the guide shaft 93 at its bottom finally contacts the guide block 45 in the rotation locking module 4. The guide block 45 is displaced in the eccentric direction under force, pushing the top slider 44 and the snap-fit ​​slider 41 to slide out of the outer groove 312, so that the snap-fit ​​protrusion 40 snaps into the snap-fit ​​groove 26 on the column 21. At the same time, the insertion slide plate 43 disengages from the slot 612 of the inner piston 61. At this time, the rotating ring tube 31 is locked, and the angle of the perforating gun 8 is fixed.

[0059] Detonation preparation: Rotating sleeve 15 covers the rod-throwing groove 14 again, restoring the sealing of the oil pipe mechanism 1. The inner piston 61 in the hydraulic detonation module 6 was originally fixed to the rotating ring tube 31 by shear pin 62 and provided secondary limit by the insertion of the insertion slide plate 43 into the slot 612. After the rod 9 falls, the insertion slide plate 43 disengages, releasing the secondary limit.

[0060] Hydraulic detonation: The hydraulic pressure in the oil pipe mechanism 1 is continuously increased by the perforation pump truck. When the hydraulic thrust exceeds the threshold of the shear pin 62, the shear pin 62 breaks. The inner piston 61 moves downward along the rotating ring tube 31 under hydraulic pressure, which drives the firing pin 63 to strike the detonator 7, detonating the detonator 7 and further detonating the perforation gun 8 to complete the perforation operation.

[0061] The embodiments disclosed in this invention are preferred embodiments, but are not limited thereto. Those skilled in the art can easily understand the spirit of this invention based on the above embodiments and make different extensions and variations, but as long as they do not depart from the spirit of this invention, they are all within the protection scope of this invention.

Claims

1. A hydraulic detonation device for tubing conveying perforation, characterized in that, include: Pipeline mechanism (1); The connecting module (2) includes a column (21) located at the bottom of the oil pipe mechanism (1), a sliding cavity (22) is provided inside the column (21), and a plurality of through holes (24) communicating with the sliding cavity (22) are provided at the top of the column (21). Both ends of the column (21) are provided with rotating holes (23) that communicate with the sliding cavity (22). The surface of the rotating hole (23) at the top end is provided with several snap-fit ​​grooves (26) in an annular and equally spaced structure. The hydraulic rotary module (3) includes a rotary ring tube (31) and a piston ring (33). The rotary ring tube (31) is disposed on the slide cavity (22), and the piston ring (33) is slidably disposed in the slide cavity (22). The inner surface of the piston ring (33) is movably connected to the rotary ring tube (31). The top of the rotating ring tube (31) is provided with a top sliding groove (311), and the outer surface of the top of the rotating ring tube (31) is provided with an outer sliding groove (312) that communicates with the top sliding groove (311). Gas is filled in the lower cavity formed by the gap between the bottom end of the piston ring (33), the sliding cavity (22) and the rotating ring tube (31). Under the action of hydraulic force, the piston ring (33) slides along the sliding cavity (22) and drives the rotating ring tube (31) to rotate. A rotary locking module (4) is provided on the rotary annular tube (31); The rotating locking module (4) includes a snap-fit ​​slider (41), a plug-in slide plate (43), and a top slider (44). The snap-fit ​​slider (41) is slidably disposed on the outer slide groove (312). A plurality of snap-fit ​​protrusions (40) are uniformly fixed on the outer surface of the snap-fit ​​slider (41). The snap-fit ​​protrusions (40) are snap-fitted into the snap-fit ​​groove (26). The snap-fit ​​slider (41) and the outer slide groove (312) are elastically connected by at least one spring (42). The plug-in slide plate (43) is slidably disposed on the outer slide groove (312) and fixedly connected to the snap-fit ​​slider (41). The top slider (44) is slidably disposed on the top slide groove (311). The top slider (44) extends out of the top slide groove (311) and is fixedly provided with a guide block (45). The lower connector (5) is located at the bottom of the connecting module (2) and is fixedly connected to the rotating ring tube (31); A hydraulic detonation module (6) is located inside the rotating ring tube (31); The rotary locking module (4) provides additional limiting for the hydraulic detonation module (6) in the initial state; Detonator (7) is fixed on the lower connector (5); The perforating gun (8) is threaded onto the lower connector (5); The rod (9) can be dropped along the oil pipe mechanism (1). When the rod (9) falls, it can trigger the rotation locking module (4) to lock the rotating ring pipe (31) and simultaneously release the additional limit on the hydraulic detonation module (6).

2. The hydraulic detonation device for tubing conveying perforation according to claim 1, characterized in that, The tubing mechanism (1) includes a branch pipe A (11) and several branch pipes B (12). The branch pipe A (11) and the branch pipe B (12) are threaded together. Any two branch pipes B (12) are threaded together. A threaded groove (13) is opened on the surface of the branch pipe A (11) at the top. A rod-throwing groove (14) is opened at the bottom of the threaded groove (13). A sleeve (15) is threadedly connected to the threaded groove (13).

3. The hydraulic detonation device for tubing conveying perforation according to claim 2, characterized in that, The top of the column (21) is fixed with an upper threaded tube (25), which is threaded to the bottom of the branch tube B (12).

4. The hydraulic detonation device for tubing conveying perforation according to claim 1, characterized in that, The two ends of the rotating ring tube (31) are rotatably connected to the two rotating holes (23). The surface of the rotating ring tube (31) is provided with a number of threaded guide grooves (32) in an annular and equally spaced structure. The inner surface of the piston ring (33) is provided with a number of threaded protrusions (34) in an annular and equally spaced structure. The number of threaded protrusions (34) are movably connected to the number of threaded guide grooves (32).

5. The hydraulic detonation device for tubing conveying perforation according to claim 1, characterized in that, The inner surface of the top of the rotating ring tube (31) is provided with an inner groove (313) that communicates with the outer groove (312).

6. The hydraulic detonation device for tubing conveying perforation according to claim 1, characterized in that, The lower connector (5) includes a connecting ring block (51), which is located at the bottom end of the column (21). The bottom end of the rotating ring tube (31) passes through the rotating hole (23) located at the bottom end and is fixedly connected to the connecting ring block (51). The detonator (7) is fixed on the inner surface of the connecting ring block (51). The bottom end of the connecting ring block (51) is fixed with a lower threaded tube (52). The perforating gun (8) is threadedly connected to the lower threaded tube (52). The bottom end of the detonator (7) is connected to the detonating cord of the perforating gun (8).

7. The hydraulic detonation device for tubing conveying perforation according to claim 1, characterized in that, The hydraulic detonation module (6) includes an inner piston (61) and a firing pin (63). The inner piston (61) is movably disposed inside the rotating ring tube (31). The inner piston (61) and the rotating ring tube (31) are fixedly connected by a shear pin (62). The firing pin (63) is fixedly disposed at the bottom end of the inner piston (61).

8. The hydraulic detonation device for tubing conveying perforation according to claim 7, characterized in that, The inner piston (61) has a ball notch (611) at its top end, and the inner piston (61) has a number of slots (612) with an annular and equally spaced structure on its surface. The number of the insertion slide plates (43) are respectively inserted into the number of slots (612).

9. The hydraulic detonation device for tubing conveying perforation according to claim 2, characterized in that, Several of the guide blocks (45) are movably fitted with the rod body (9). The rod body (9) includes a column block (91) adapted to the cavity of the branch pipe B (12). Both ends of the column block (91) are spherical. Several vertical holes A (92) are opened on the column block (91) in an annular and equally spaced structure. A guide shaft (93) is fixed at the bottom end of the rod body (9). A vertical hole B (94) is opened on the guide shaft (93). The vertical hole B (94) extends into the column block (91) and communicates with the top end of the column block (91).

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