A fracturing synergistic perforating gun for oil and gas wells

Abstract

The present application relates to the technical field of oil and gas field development, in particular to an oil and gas well fracturing efficiency increasing perforating gun, which comprises an outer pipe body, a bullet loading rod frame and an extension guide mechanism. The bullet loading rod frame is installed in the outer pipe body and coaxial with the outer pipe body. A plurality of bullet loading holes for loading perforating bullets are distributed on the bullet loading rod frame. A plurality of extension guide mechanisms are distributed on the outer pipe body and correspond to the bullet loading holes one by one. The extension guide mechanism provides a focused energy guide channel, which can focus the energy of the airflow, avoid excessive pressure relief and energy loss, and keep the jet flow at a high speed to form a deeper perforation, thereby effectively expanding the perforation coverage range. At the same time, the extension guide mechanism provides a straight guide area for the jet flow, so that the jet flow moves along the extension direction of the focused energy guide channel during flight, ensuring that the perforation can accurately reach the target area and improving the accuracy of oil and gas collection.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oil and gas field development, in particular to a fracturing and perforating gun for oil and gas well. BACKGROUND

[0002] The fracturing and perforating gun for oil and gas well is a device specially designed to improve the production of oil and gas wells. It forms multiple efficient fluid channels by accurately perforating the well wall, and effectively improves the flowability and production of oil and gas in cooperation with fracturing operation. This perforating gun can ensure the quality and uniform distribution of the perforation, maximize the fracturing effect, and thus significantly improve the production efficiency of the oil and gas well.

[0003] When the perforating charge in the perforating gun is ignited, high-temperature and high-pressure gas is generated. These gases expand rapidly to form a high-speed gas flow, which accelerates the metal part of the perforating charge head to an extremely high speed, forming a high-speed bullet jet, and penetrating the casing and cement ring of the downhole closed oil and gas production layer and entering the oil and gas layer to form a fluid channel connecting the wellbore and the oil and gas production layer.

[0004] During the perforation process of the traditional perforating gun, due to the gap between the perforating gun and the oil well casing, after the high-speed bullet jet is shot out, the high-speed gas flow will directly decompress in the gap between the perforating gun and the oil well casing. The high-speed gas flow diffuses rapidly, resulting in serious energy loss, which leads to rapid pressure reduction and weakens the perforation ability.

[0005] Secondly, the irregular diffusion of high-speed gas flow causes the high-speed bullet jet to deviate from the original perforation path, and thus the angle of shooting into the oil and gas layer changes, which deviates from the predetermined perforation target area and affects the accurate collection of oil and gas. SUMMARY

[0006] The present application aims to provide a fracturing and perforating gun for oil and gas well to solve the technical problems raised in the background.

[0007] To achieve the above-mentioned purpose, the present application provides the following technical solutions.

[0008] A fracturing and perforating gun for oil and gas well, comprising an outer pipe body, a charge loading rod holder and an extension guide mechanism.

[0009] The charge loading rod holder is installed in the outer pipe body and coaxial with the outer pipe body. A plurality of charge loading holes for loading perforating charges are distributed on the charge loading rod holder.

[0010] A plurality of extension guide mechanisms are distributed on the outer pipe body and correspond one-to-one with the charge loading holes. The extension guide mechanism is used to provide an energy-concentrating guide channel extending radially along the outer pipe body between the charge loading rod holder and the inner wall of the oil well casing, so as to control the flight trajectory of the high-speed bullet jet.

[0011] At the moment of the perforating charge explosion, the high-temperature and high-pressure gas flow and the bullet jet flow enter the energy-gathering guide channel, the energy of the gas flow can be gathered through the energy-gathering guide channel, the energy loss caused by excessive pressure relief is avoided, the energy concentration makes the jet flow maintain a high speed, a deeper perforation is formed, the perforation coverage range is effectively expanded, and the purpose of oil and gas collection efficiency is achieved. On the other hand, the energy-gathering guide channel provides a straight guide area for the jet flow, so that the jet flow moves along the extension direction of the energy-gathering guide channel during flight, thereby reducing the deflection and inclination of the jet flow, ensuring that the jet flow can move along the predetermined path, and making the perforation accurately reach the target area, thereby improving the accuracy of oil and gas collection.

[0012] Preferably, the lengthening guide mechanism comprises a guide piece, a first arc-shaped abutting seat, a second arc-shaped abutting seat and an elastic piece.

[0013] The outer pipe body is provided with a plurality of mounting holes, and the positions of the mounting holes correspond one by one to the positions of the bullet loading holes.

[0014] The guide piece is limited to slide through and is mounted in the corresponding mounting hole, the first arc-shaped abutting seat is fixed on the end of the guide piece extending into the outer pipe body, and the second arc-shaped abutting seat is fixed on the end of the guide piece located outside the outer pipe body.

[0015] The energy-gathering guide channel is arranged in the guide piece, the first arc-shaped abutting seat and the second arc-shaped abutting seat.

[0016] The elastic piece is arranged around the guide piece, and when the perforating charge is not exploded, the first arc-shaped abutting seat is tightly abutted on the outer wall of the bullet loading rod frame by the elastic supporting action of the elastic piece, so as to ensure that the bullet loading hole is communicated with the energy-gathering guide channel.

[0017] The jet flow resistance structure is arranged on the inner wall of the energy-gathering guide channel, and is used for resisting the high-speed gas flow when the perforating charge is exploded, so as to push the guide piece to slide to the side away from the bullet loading rod frame, and make the second arc-shaped abutting seat tightly abut against the inner wall of the oil well casing.

[0018] Preferably, the jet flow resistance structure comprises an annular groove arranged on the inner wall of the energy-gathering guide channel, and an annular stopper fixed on the inner wall of the annular groove and close to the side of the second arc-shaped abutting seat.

[0019] The cross section of the annular groove is in an arc shape, and the cross section of the annular stopper is in a barb shape.

[0020] The annular stopper and the inner wall of the annular groove form a jet flow resistance cavity for resisting the high-speed gas flow.

[0021] Preferably, the elastic piece is a spring, the spring is sleeved outside the guide piece, one end of the spring is fixed on the inner wall of the outer pipe body, and the other end of the spring is fixed on the outer wall of the first arc-shaped abutting seat.

[0022] Preferably, the curvature of the first arc-shaped abutting seat is matched with the curvature of the outer wall of the charging rod holder, and the curvature of the second arc-shaped abutting seat is matched with the curvature of the inner wall of the oil well casing.

[0023] A sealing ring is fixed around the shaped charge guiding channel port on the first arc-shaped abutting seat, and a sealing ring is also fixed around the shaped charge guiding channel port on the second arc-shaped abutting seat.

[0024] Preferably, a ring-shaped abutting part is fixed on the first arc-shaped abutting seat, which can be matched and inserted into the charging hole and abut against the outer periphery of the perforating charge when the guide is tightly abutted against the outer wall of the charging rod holder.

[0025] A plurality of flow guide cavities are arranged in an array around the axis of the inner wall of the ring-shaped abutting part, which are used for directly guiding the high-temperature and high-pressure gas generated during detonation into the jet impedance cavity.

[0026] Preferably, the oil and gas well fracturing efficiency increasing perforating gun further comprises a bottom cover.

[0027] The bottom cover is fixed and welded at the bottom of the outer pipe body to block the bottom of the outer pipe body.

[0028] The bottom cover is provided with a plug-in hole.

[0029] The bottom end of the charging rod holder is fixed with a plug-in part which can be matched and plugged into the plug-in hole for positioning.

[0030] The cross section of the plug-in part is rectangular.

[0031] Preferably, the oil and gas well fracturing efficiency increasing perforating gun further comprises a top cover.

[0032] The top cover is screwed on the top of the outer pipe body and abuts against the top end of the charging rod holder for press-fitting the charging rod holder in the outer pipe body.

[0033] The outer pipe body and the side wall of the top cover are jointly provided with a locking mechanism for positioning and locking the top cover.

[0034] Preferably, the locking mechanism comprises a mounting block fixed on the side of the top cover and provided with a sliding hole, a clamping seat fixed on the side of the outer pipe body and provided with a clamping hole, and a clamping pin which is slidably plugged into the sliding hole and can be matched and inserted into the clamping hole.

[0035] A magnet block which can be magnetically matched with the clamping pin is fixed on the inner bottom wall of the clamping hole.

[0036] Preferably, the oil and gas well fracturing efficiency increasing perforating gun is further provided with a plurality of clamping parts, and a handle is fixed on each clamping part.

[0037] The inner edge of the handle is in line with the outer edge of the guide.

[0038] Compared with the prior art, the oil and gas well fracturing efficiency increasing perforating gun has the following advantages.

[0039] The present application provides a shaped charge guide channel by setting an extension guide mechanism, at the moment of detonation of the perforating bullet, the high-temperature and high-pressure gas flow and bullet jet generated enter the shaped charge guide channel, the gas flow can be concentrated energy through the shaped charge guide channel, avoiding excessive pressure relief leading to energy loss, energy concentration makes the jet maintain a high speed to form a deeper perforation, thereby effectively expanding the perforation coverage range, achieving the purpose of oil and gas collection efficiency.

[0040] The shaped charge guide channel in the present application provides a linear guide area for the jet, so that the jet moves along the extension direction of the shaped charge guide channel during flight, thereby reducing the deflection and inclination of the jet, ensuring that the jet can move along the predetermined path, making the perforation accurately reach the target area, and improving the accuracy of oil and gas collection.

[0041] When the perforating bullet is detonated, the instantaneous high-temperature and high-pressure gas generated enters the shaped charge guide channel, and the jet impedance structure generates resistance to the gas flow, which generates a forward thrust when the gas flow passes through the shaped charge guide channel, overcoming the elastic force of the elastic member, pushing the guide member to move in the installation hole away from the bullet loading rod holder, and then making the second arc-shaped abutting seat tightly abut on the inner wall of the oil well casing, realizing the movable extension of the shaped charge guide area, and avoiding the gap between the guide member and the oil well casing to achieve the expected effect.

[0042] By setting the flow guide cavity on the annular abutting member, the high-temperature and high-pressure gas generated at the moment of detonation can be directly guided into the jet impedance cavity, forming additional thrust supplement, ensuring that the guide member can obtain sufficient pushing force, realizing stable and efficient movement of the guide member, and maximizing the use of energy generated by explosion, improving the thrust efficiency.

[0043] By the movable adjustment design of the guide member, the second arc-shaped abutting seat is pulled outward, driving the guide member, the first arc-shaped abutting seat and the annular abutting member to move outward simultaneously to leave space in the middle of the outer pipe body, avoiding the blockage and interference of the first arc-shaped abutting seat and the annular abutting member to the installation of the bullet loading rod holder, after the bullet loading rod holder is installed in the outer pipe body, the second arc-shaped abutting seat is released, and the spring elastic force can push the first arc-shaped abutting seat to approach the bullet loading rod holder until close, thereby driving the annular abutting member to automatically insert into the bullet loading hole to abut and press the perforating bullet, at the same time, the guide member and the second arc-shaped abutting seat approach the bullet loading rod holder side, reducing the overall volume of the perforating gun, facilitating the installation of the perforating gun into the oil well casing and the smooth lowering to the target position. BRIEF DESCRIPTION OF DRAWINGS

[0044] Figure 1 It is a three-dimensional schematic view of the overall structure of the present application;

[0045] Figure 2 It is a three-dimensional schematic view of the overall structure of the present application; Figure 1The structure cross-sectional view shown is a schematic diagram.

[0046] Figure 3 The structure shown is a schematic diagram of the partial structure. Figure 1 The structure shown is a schematic diagram of the partial structure.

[0047] Figure 4 The structure shown is a schematic diagram of the partial structure.

[0048] Figure 5 The structure shown is a schematic diagram of the partial structure. Figure 4 The structure shown is a schematic diagram of the partial structure.

[0049] Figure 6 The structure shown is a schematic diagram of the partial structure.

[0050] Figure 7 The structure shown is a schematic diagram of the partial structure.

[0051] Figure 8 The structure shown is a schematic diagram of the partial structure.

[0052] Figure 9 The structure shown is a schematic diagram of the partial structure.

[0053] Figure 10 The structure shown is a schematic diagram of the partial structure.

[0054] Figure 11 The structure shown is a schematic diagram of the partial structure.

[0055] In the figure: 01, perforating bullet; 02, detonation part; 1, outer tube body; 11, mounting hole; 2, bullet mounting rod holder; 21, bullet mounting hole; 22, leading hole; 23, plug-in part; 3, extension guide mechanism; 301, energy-gathering guide channel; 31, guide piece; 32, first arc-shaped abutting seat; 33, second arc-shaped abutting seat; 34, spring; 35, annular abutting piece; 351, flow guide cavity; 4, jet impedance structure; 41, annular groove; 42, annular blocking piece; 43, jet impedance cavity; 5, top cover; 6, locking mechanism; 61, mounting block; 611, sliding hole; 62, clamping seat; 621, clamping hole; 63, clamping pin; 64, magnet block; 7, bottom cover; 71, plug-in hole; 8, clamping piece; 81, pinch handle. DETAILED DESCRIPTION

[0056] Please refer to Figures 1-11 The present application provides an oil and gas well fracturing efficiency perforating gun, which is described below in combination with the drawings of the embodiments of the present application.

[0057] In the description of the embodiments of the present application, it should be noted that unless specifically defined and limited, the terms "connected", "mounted" should be understood in a broad sense, for example, "connected" can be detachably connected or non-detachably connected, and can be directly connected or indirectly connected through an intermediate medium. In addition, "communication" can be direct communication or indirect communication through an intermediate medium. Among them, "fixed" means connected to each other and the relative positional relationship after connection does not change. The orientation language mentioned in the embodiments of the present application, such as "inner", "outer", "top", "bottom" and the like, is only the direction of the drawing, therefore, the orientation language used is for better and clearer description and understanding of the embodiments of the present application, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0058] In the embodiments of the present application, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more of the features.

[0059] In the embodiments of the present application, "and / or" is only a description of the association relationship of the associated objects, which means that there can be three kinds of relationships, for example, A and / or B can represent the existence of A alone, the existence of A and B together, and the existence of B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are in an "or" relationship.

[0060] The reference "one embodiment" or "some embodiments" and the like described in the specification means that the specific features, structures or characteristics described in connection with the embodiment are included in one or more embodiments of the present application. Therefore, the statements "in one embodiment", "in some embodiments", "in other some embodiments", "in other some embodiments" and the like appearing in different places in the specification are not necessarily all referring to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized. The terms "include", "contain", "have" and their variants mean "include but not limited to", unless otherwise specifically emphasized.

[0061] The oil and gas well fracturing efficiency perforating gun comprises an outer pipe body 1, a bullet loading rod frame 2 and an extension guide mechanism 3, the outer pipe body 1 is provided with a supporting structure (not shown in the figure), which is used for supporting the outer pipe body 1 in the oil well casing to ensure the stability of the whole when the perforation is detonated, thereby ensuring that the perforation path will not be deviated, the supporting structure adopts the prior art, and the specific structure and working principle will not be described in detail.

[0062] The loading rod frame 2 is mounted in the outer pipe body 1 and coaxial with the outer pipe body 1, and a plurality of loading holes 21 for loading the perforating bullet 01 are distributed on the loading rod frame 2, and a plurality of extension guide mechanisms 3 are distributed on the outer pipe body 1 and correspond to the positions of the loading holes 21 one by one. The loading holes 21 are preferably arranged in a spiral around the loading rod frame 2, so that multiple perforating points can be ensured and the perforating points are uniformly distributed.

[0063] In addition, an outlet hole 22 with a diameter slightly smaller than the outer diameter of the loading rod frame 2 is arranged on the inner end wall of the loading hole 21, as shown in the figure. After the perforating bullet 01 is loaded into the loading hole 21, the detonation part 02 at the tail of the perforating bullet 01 can be led out of the outlet hole 22 to the outside of the loading rod frame 2, which is convenient for connecting with the detonation device. In addition, the area of the tail of the loading hole 21 except the detonation part 02 can be in close contact with the inner end wall of the loading hole 21, which is used to support the shell of the perforating bullet 01 to resist the recoil force when the perforating bullet 01 is detonated, so as to ensure the stability of the perforation. Figure 6

[0064] The extension guide mechanism 3 is used to provide an energy-gathering guide channel 301 extending radially along the outer pipe body 1 between the loading rod frame 2 and the inner wall of the casing of the oil well, so as to control the flight trajectory of the high-speed bullet jet.

[0065] At the moment of detonation of the perforating bullet 01, the high-temperature and high-pressure gas flow and the bullet jet flow enter the energy-gathering guide channel 301. The energy of the gas flow can be gathered through the energy-gathering guide channel 301, so as to avoid excessive pressure relief and energy loss. The energy concentration makes the jet flow maintain a high speed, so as to form a deeper perforation, thereby effectively expanding the perforation coverage range and achieving the purpose of increasing the efficiency of oil and gas collection.

[0066] On the other hand, the energy-gathering guide channel 301 provides a straight guide area for the jet flow, so that the jet flow moves along the extension direction of the energy-gathering guide channel 301 during flight, thereby reducing the deflection and inclination of the jet flow, ensuring that the jet flow can move along the predetermined path, making the perforation accurately reach the target area, and improving the accuracy of oil and gas collection.

[0067] As shown in the figure, the extension guide mechanism 3 includes a guide piece 31, a first arc-shaped abutting seat 32, a second arc-shaped abutting seat 33 and an elastic member. A plurality of mounting holes 11 are distributed on the outer pipe body 1, and the positions of the mounting holes 11 correspond to the positions of the loading holes 21 one by one. The guide piece 31 is respectively limited to slide and penetrate into the corresponding mounting hole 11. The first arc-shaped abutting seat 32 is fixed on the end of the guide piece 31 extending into the outer pipe body 1. The second arc-shaped abutting seat 33 is fixed on the end of the guide piece 31 located outside the outer pipe body 1. The guide piece 31, the first arc-shaped abutting seat 32 and the second arc-shaped abutting seat 33 are jointly provided with the energy-gathering guide channel 301. The elastic member is arranged around the guide piece 31. Figures 3 to 7

[0068] ​​When the perforating charge 01 is not detonated, the first arc-shaped abutting seat 32 is tightly abutted on the outer wall of the charge rod holder 2 by the elastic supporting force of the elastic member, so as to ensure that the charge hole 21 communicates with the shaped charge guiding channel 301, and the inner wall of the shaped charge guiding channel 301 is provided with a jet impedance structure 4, which is used for resisting the high-speed airflow when the perforating charge 01 is detonated, so as to push the guiding member 31 to slide to the side away from the charge rod holder 2, and make the second arc-shaped abutting seat 33 tightly abut against the inner wall of the oil well casing.

[0069] When the perforating charge 01 is detonated, the instantaneous high-temperature and high-pressure gas generated enters the shaped charge guiding channel 301, the jet impedance structure 4 generates resistance to the airflow, the resistance will generate a forward thrust when the airflow passes through the shaped charge guiding channel 301, which overcomes the elastic force of the elastic member, pushes the guiding member 31 to move in the mounting hole 11 to the side away from the charge rod holder 2, and further makes the second arc-shaped abutting seat 33 tightly abut against the inner wall of the oil well casing, so as to realize the movable extension of the shaped charge guiding area, and avoid the gap between the guiding member 31 and the oil well casing to achieve the expected effect.

[0070] The jet impedance structure 4 includes an annular groove 41 provided on the inner wall of the shaped charge guiding channel 301 and an annular stopper 42 fixed on the inner wall of the annular groove 41 and close to the side of the second arc-shaped abutting seat 33, the cross section of the annular groove 41 is arc-shaped, the cross section of the annular stopper 42 is formed in a barb shape with the cross section of the annular groove 41, and the annular stopper 42 and the inner wall of the annular groove 41 form a jet impedance cavity 43 for resisting the high-speed airflow, as shown in Figure 7 When the high-temperature and high-pressure airflow generated by detonation enters the shaped charge guiding channel 301, it will enter the jet impedance cavity 43 formed by the annular groove 41 and the annular stopper 42, so as to push the guiding member 31 to move, Figure 7 The solid line arrow in the figure shows the flow direction of the high-temperature and high-pressure airflow generated by detonation.

[0071] The elastic member is a spring 34, which is sleeved outside the guiding member 31, one end of the spring 34 is fixed on the inner wall of the outer pipe body 1, and the other end is fixed on the outer wall of the first arc-shaped abutting seat 32, when the guiding member 31 moves to the side away from the charge rod holder 2, the spring 34 is compressed, and the thrust force of the high-temperature and high-pressure airflow on the guiding member 31 is greater than the elastic force of the spring 34.

[0072] In addition, the curvature of the first arc-shaped abutting seat 32 is matched with the curvature of the outer wall of the charge rod holder 2, and the curvature of the second arc-shaped abutting seat 33 is matched with the curvature of the inner wall of the oil well casing, so as to ensure high fitting degree, a sealing ring (not shown in the figure) is fixed around the port of the shaped charge guiding channel 301 on the first arc-shaped abutting seat 32, and a sealing ring (not shown in the figure) is also fixed around the port of the shaped charge guiding channel 301 on the second arc-shaped abutting seat 33, so as to effectively improve the sealing performance.

[0073] It is worth mentioning that the guide 31 and the components thereon in the present application are made of high-strength alloy material, which has strong impact resistance and is not easy to be damaged.

[0074] The first arc-shaped abutting seat 32 is fixed with a ring-shaped abutting member 35, as shown in the figure. Figure 6 When the guide 31 is tightly abutted on the outer wall of the cartridge rod holder 2, the ring-shaped abutting member 35 can be matched and inserted into the cartridge hole 21 and abut against the periphery of the end of the jetting bullet 01, and abut against the tail of the jetting bullet 01 on the end wall inside the cartridge hole 21, thereby ensuring the stability of the jetting bullet 01 after being loaded, avoiding the movement of the cartridge hole 21 affecting the stability of the jet, and further avoiding the ring-shaped abutting member 35 abutting against the head of the jetting bullet 01, which will not block the jet.

[0075] In addition, a plurality of flow guide cavities 351 are arranged in an array on the inner wall of the ring-shaped abutting member 35 around the axis thereof, as shown by the dotted arrows in the figure. Figure 7 The flow guide cavities 351 are used to guide the high-temperature and high-pressure gas generated during detonation directly into the jet resistance cavity 43, thereby forming additional thrust supplement, ensuring that the guide 31 can obtain sufficient driving force, realizing the stable and efficient movement of the guide 31, maximizing the use of energy generated by explosion, and improving the thrust efficiency.

[0076] In addition, through the design of the movable adjustment of the guide 31, the second arc-shaped abutting seat 33 is pulled outward, driving the guide 31, the first arc-shaped abutting seat 32 and the ring-shaped abutting member 35 to move outward simultaneously to leave space in the middle of the outer pipe body 1, avoiding the blockage of the first arc-shaped abutting seat 32 and the ring-shaped abutting member 35 to the loading of the cartridge rod holder 2. After the cartridge rod holder 2 is loaded into the outer pipe body 1, the second arc-shaped abutting seat 33 is released, and the spring 34 can push the first arc-shaped abutting seat 32 to move close to the cartridge rod holder 2 until it is close, thereby driving the ring-shaped abutting member 35 to automatically insert into the cartridge hole 21 to abut and press the jetting bullet 01. At the same time, the guide 31 and the second arc-shaped abutting seat 33 move close to one side of the cartridge rod holder 2, thereby reducing the overall size of the jetting gun, facilitating the loading of the jetting gun into the oil well casing and the smooth lowering to the target position.

[0077] Specifically, the oil and gas well fracturing efficiency perforating gun further comprises a top cover 5 and a bottom cover 7, the bottom cover 7 is fixed and welded at the bottom of the outer pipe body 1 to block the bottom of the outer pipe body 1, and the bottom cover 7 is provided with an insertion hole 71, and the bottom end of the cartridge rod holder 2 is fixed with an insertion part 23 which can be matched and inserted into the insertion hole 71 for positioning, the cross section of the insertion part 23 is rectangular, and the cross section of the insertion hole 71 is rectangular which is matched with the insertion part 23. After the insertion part 23 is inserted into the insertion hole 71, the positioning effect is achieved, thereby ensuring that the cartridge hole 21 can be aligned with the energy-gathering guide channel 301, and ensuring the accuracy during installation.

[0078] The top cover 5 is screwed on the top of the outer pipe body 1 and abuts against the top end of the loading rod holder 2, for pressing the loading rod holder 2 into the outer pipe body 1. The threaded installation of the top cover 5 is detachable and convenient to disassemble and assemble. When the top cover 5 is screwed on the top of the outer pipe body 1, the top cover 5 abuts against the top end of the loading rod holder 2, so that the insertion portion 23 is pressed into the insertion hole 71, thereby achieving the fixed installation of the loading rod holder 2.

[0079] In addition, the outer pipe body 1 and the top cover 5 are provided with a locking mechanism 6 on the side walls, for positioning and locking the top cover 5. The locking mechanism 6 comprises a mounting block 61 fixed on the side of the top cover 5 and provided with a sliding hole 611, a clamping seat 62 fixed on the side of the outer pipe body 1 and provided with a clamping hole 621, and a clamping pin 63 slidably inserted into the sliding hole 611 and capable of being matched and inserted into the clamping hole 621. After the top cover 5 is screwed in place, the clamping pin 63 is aligned with the clamping hole 621, the clamping pin 63 is inserted into the clamping hole 621, the top cover 5 is clamped and locked, the top cover 5 is prevented from being loosened due to the vibration caused by perforation, thereby effectively ensuring the stable installation of the loading rod holder 2. A magnet block 64 capable of being magnetically matched with the clamping pin 63 is fixed on the bottom wall of the clamping hole 621, which effectively prevents the clamping pin 63 inserted into the clamping hole 621 from being randomly pulled out, thereby ensuring the reliability of the clamping and locking.

[0080] Please refer to the drawings Figure 10 As shown in the drawings, the oil and gas well fracturing and perforating gun is also provided with a plurality of clamping pieces 8, each of which is fixed with a pinch handle 81, and the inner edge of the pinch handle 81 is consistent with the outer edge of the guide 31. The clamping piece 8 is a part of the oil and gas well fracturing and perforating gun. Before the loading rod holder 2 is installed into the outer pipe body 1, the second arc-shaped abutting seat 33 is pulled outward, and then the clamping piece 8 is clamped on the pinch handle 81 from top to bottom, as shown in the drawings. Figure 11 As shown in the drawings, the clamping piece 8 provides limiting support between the second arc-shaped abutting seat 33 and the outer wall of the outer pipe body 1, thereby preventing the guide 31 from being retracted, and facilitating the installation of the loading rod holder 2.

[0081] It is apparent for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, but can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application.

Claims

1. An oil and gas well fracturing augmented perforating gun, characterized by, The utility model relates to a perforating gun barrel, including: outer tube body (1); Gun loading rod frame (2) is installed in the outer tube body (1) with the outer tube body (1) is coaxial, and the gun loading rod frame (2) is distributed with a plurality of gun loading hole (21) for loading perforating bullet (01); Extension guide mechanism (3) is distributed on the outer tube body (1) with the gun loading hole (21) position one to one correspondence, and the extension guide mechanism (3) is used for providing the energy -gathering guide channel (301) of along the radial extension of the outer tube body (1) between the gun loading rod frame (2) and the casing inner wall of oil well to control the high -speed bullet jet flight trajectory; The extension guide mechanism (3) includes guide (31), first arc abutment seat (32), second arc abutment seat (33) and elastic member; The outer tube body (1) is distributed with a plurality of mounting hole (11), and the mounting hole (11) position corresponds with the gun loading hole (21) position one to one; The guide (31) is installed in the corresponding mounting hole (11) respectively limit sliding through, the first arc abutment seat (32) is fixed on the end of the guide (31) extending to the outer tube body (1), and the second arc abutment seat (33) is fixed on the end of the guide (31) located on the outside of the outer tube body (1); The guide (31), the first arc abutment seat (32) and the second arc abutment seat (33) are commonly provided with the energy -gathering guide channel (301) in them; Elastic member is arranged on the periphery of the guide (31), and when the perforating bullet (01) is not detonated, the first arc abutment seat (32) is pushed to closely adhere to the outer wall of the gun loading rod frame (2) by the elastic support of elastic member, to ensure that the gun loading hole (21) is communicated with the energy -gathering guide channel (301); The energy -gathering guide channel (301) inner wall has jet impedance structure (4), and the jet impedance structure (4) is used for resisting the high -speed airflow when the perforating bullet (01) is detonated, to push the guide (31) to the side away from the gun loading rod frame (2) and make the second arc abutment seat (33) closely abut on the casing inner wall of oil well; The jet impedance structure (4) includes annular groove (41) set up on the inner wall of the energy -gathering guide channel (301) and annular stopper (42) fixed on the inner wall of the annular groove (41) and close to the side of the second arc abutment seat (33); The annular groove (41) section is arc shape, and the annular stopper (42) section forms the barb shape with the annular groove (41) section; The annular stopper (42) and the annular groove (41) inner wall form jet impedance cavity (43) for resisting high -speed airflow between them; The radian of the first arc abutment seat (32) is adapted with the radian of the gun loading rod frame (2) outer wall, and the radian of the second arc abutment seat (33) is adapted with the radian of the casing inner wall of oil well. A sealing ring is fixed around the port of the energy-gathering guide channel (301) on the first arc-shaped abutting seat (32), and a sealing ring is also fixed around the port of the energy-gathering guide channel (301) on the second arc-shaped abutting seat (33); An annular abutting member (35) is fixed on the first arc-shaped abutting seat (32), and when the guide member (31) is tightly abutted on the outer wall of the cartridge rod holder (2), the annular abutting member (35) can be matched and inserted into the cartridge hole (21) and abut against the outer periphery of the perforating charge (01); a plurality of flow guide cavities (351) are arranged in an array around the axis on the inner wall of the annular abutting member (35), and the flow guide cavities (351) are used for directly guiding the high-temperature and high-pressure gas generated when detonation into the jet impedance cavity (43).

2. The oil and gas well fracturing efficiency increasing perforating gun according to claim 1, characterized in that: The elastic member is a spring (34), which is sleeved on the outside of the guide member (31) and fixed at one end on the inner wall of the outer pipe body (1) and at the other end on the outer wall of the first arc-shaped abutting seat (32).

3. The oil and gas well fracturing efficiency increasing perforating gun according to claim 1, characterized in that: It further comprises a bottom cover (7); The bottom cover (7) is fixedly welded on the bottom of the outer pipe body (1) to block the bottom of the outer pipe body (1); The bottom cover (7) is provided with a plug-in hole (71); The cartridge rod holder (2) is fixed at the bottom end with a plug-in part (23) which can be matched and plugged into the plug-in hole (71) for positioning; The cross section of the plug-in part (23) is rectangular.

4. The oil and gas well fracturing efficiency increasing perforating gun according to claim 3, characterized in that: It further comprises a top cover (5); The top cover (5) is screwed on the top of the outer pipe body (1) and abuts against the top end of the cartridge rod holder (2) to press fit the cartridge rod holder (2) in the outer pipe body (1); The outer pipe body (1) and the top cover (5) are jointly provided with a locking mechanism (6) on the side walls to position and lock the top cover (5).

5. The oil and gas well fracturing efficiency increasing perforating gun according to claim 4, characterized in that: The locking mechanism (6) comprises a mounting block (61) fixed on the side of the top cover (5) and provided with a sliding hole (611), a clamping seat (62) fixed on the side of the outer pipe body (1) and provided with a clamping hole (621), and a clamping pin (63) which is slidably plugged into the sliding hole (611) and can be matched and inserted into the clamping hole (621); A magnet block (64) which can be magnetically attracted to the clamping pin (63) is fixed on the inner bottom wall of the clamping hole (621).

6. The oil and gas well fracturing efficiency increasing perforating gun according to claim 1, characterized in that: A plurality of clamping members (8) are further provided, and each clamping member (8) is fixed with a pinch handle (81); The inner edge of the pinch handle (81) is consistent with the outer edge of the guide member (31).

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