Modular cluster shooting and bridge plug combination tool for oil and gas wells

Abstract

This invention discloses a modular cluster perforation and bridge plug assembly tool for oil and gas wells, comprising an upper isolation joint, a bridge plug device, and a tool string axially assembled between the two and electrically connected. The tool string consists of several electrically connected single-cluster tool strings connected end-to-end. Each single-cluster tool string has a modular perforating gun and an initiation and control integrated module, both electrically connected end-to-end. This modular cluster perforation and bridge plug assembly tool for oil and gas wells allows for the separation and high integration of each module. The first three components can be assembled in a pyrotechnics workshop, and through isolated and separate transportation, on-site connection can be easily and quickly completed using only matching connectors. This eliminates the hidden dangers of on-site storage, use, and handling of pyrotechnics, saves preparation time, improves construction efficiency, and ensures safe construction around the clock.

Description

Technical Field

[0001] This invention relates to the field of unconventional oil and gas well cable delivery cluster perforation and bridge plug operation technology, and particularly to a modular cluster perforation and bridge plug operation tool for oil and gas wells. Background Technology

[0002] The dense cluster perforation bridge plug technology with more than 7 clusters was used in shale gas reservoirs, which achieved good results in volumetric fracturing.

[0003] Currently, the tool string for cable delivery clustering holes and bridge plugs generally adopts a double-joint design (divided into upper and lower parts). The cartridge rack is wound with a through wire, and the code and detonator are placed in the empty compartment of the lower joint. The ends of the wire are connected through the side window on the joint.

[0004] The assembly of this traditional pump-driven bridge plug perforator requires the assembly of a perforating gun, cartridge holder, perforating cartridge, detonating cord, communication lines, control module, detonator, connecting components, and more. The numerous components and complex assembly process result in a large on-site workload and lengthy preparation time. The harsh working environment negatively impacts assembly quality and construction success rate, and poses potential engineering quality risks. Furthermore, the construction process often overlaps with fracturing, gas testing, and even drilling operations, creating a complex environment. The extended on-site preparation not only leads to slow coordination and collaboration but also presents significant safety hazards.

[0005] Therefore, how to provide a modular cluster perforation and bridge plug combination tool for oil and gas wells that separates pyrotechnic equipment into perforation units and detonation units, and integrates them in a highly modular and safe manner, is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0006] The purpose of this invention is to provide a modular cluster perforation and bridge plug combination tool for oil and gas wells. This tool allows for the separation of each module and their high degree of integration. The first three components can be assembled in the pyrotechnics workshop. Through isolated and separate transportation, on-site connection can be easily and quickly completed using only matching connectors. This eliminates the hidden dangers of on-site storage, use, and handling of pyrotechnics, saves preparation time, improves construction efficiency, and ensures safe construction around the clock.

[0007] To achieve the above objectives, the present invention provides a modular cluster perforation and bridge plug combined tool for oil and gas wells, including an upper isolation joint, a bridge plug device, and a tool string axially assembled and electrically connected between the two. The tool string consists of several single cluster tool strings connected end to end and electrically connected. Each single cluster tool string has a modular perforation gun connected end to end and electrically connected, and an initiation and control integrated module.

[0008] Preferably, the single-cluster tool string also has an intermediate isolation joint and a pressure ring, the modular perforating gun is connected to the intermediate isolation joint, and the detonation and control integrated module is installed in the intermediate isolation joint and fixed by the pressure ring.

[0009] Preferably, the intermediate isolation joint has: a first external thread and a sealing ring for the lower connector on the outer side of the upper end; a second external thread and a sealing ring for the lower connector on the outer side of the lower end; and an expansion hole, a chamber, a sealing hole, and an internal thread for the lower connector arranged sequentially from top to bottom on the inner side.

[0010] The detonation and control integrated module is installed inside the intermediate isolation joint from bottom to top. The upper end of the detonation and control integrated module rests in the chamber. The outer side of the pressure ring is provided with an external thread that matches the internal thread of the lower joint. A sealing ring is provided on the outer side of the lower end of the detonation and control integrated module. The sealing ring is fitted with a sealing ring and rests in the sealing hole.

[0011] Preferably, the upper isolation connector has: an upper connector first internal thread and a sealing surface provided on the inner side of the upper end; an upper connector external thread and a sealing ring provided on the outer side of the lower end; and an upper connector through hole, an isolation sealing hole and an upper connector second internal thread provided sequentially from top to bottom inside.

[0012] The isolation sealing hole is installed from the bottom to the top with the conductive assembly and fixed with a press-fit ring. The lower end of the conductive assembly is provided with a lower conductive point and the upper end is provided with an upper conductive line or upper conductive point. The outer side of the conductive assembly is provided with a pressure-bearing sealing ring for the upper and lower ends. The press-fit ring is provided with an external thread and the upper connector second internal thread of the upper isolation connector.

[0013] Preferably, the modular perforating gun has internal threads and sealing surfaces at both the upper and lower ends, and a cartridge holder is installed inside. The cartridge holder is equipped with perforating bullets and wrapped with detonating cord. The upper and lower ends of the cartridge holder are provided with cartridge holder discs, each having an upper contact and a lower contact. The detonating cord passes through the lower contact.

[0014] Preferably, the modular perforating gun includes a first gun body, a first magazine, an upper magazine tray and a lower magazine tray, wherein the upper magazine tray and the lower magazine tray are respectively equipped with an upper contact assembly and a lower contact assembly, and the first magazine is wound with a through line connecting the upper contact assembly and the lower contact assembly.

[0015] Preferably, the modular perforating gun includes a second gun body, a second magazine, an insulated upper magazine tray and an insulated lower magazine tray. The second magazine is a conductor, and an upper contact protrusion and a lower contact protrusion are respectively provided at the upper and lower ends of the second magazine. The upper contact protrusion is equipped with a compression conductive spring, an upper compression contact and an upper contact insulating pressure ring.

[0016] Preferably, the detonation and control integrated module includes: a supporting body, an input contact assembly and an output contact seal respectively installed at the upper and lower ends of the supporting body, a detonator and an coded switch installed inside the supporting body; the input contact assembly and the output contact seal respectively have an input contact and an output contact communicating with the coded switch, and the coded switch is communicating with the detonator.

[0017] Preferably, the bridge plug device includes a bridge plug transition joint, a bridge plug ignition control module, a bridge plug setting tool, and a bridge plug. The bridge plug ignition control module is installed on the bridge plug transition joint. The upper end of the bridge plug transition joint is connected to the single-cluster tool string, and the lower end is connected to the bridge plug through the bridge plug setting tool.

[0018] Preferably, the bridge plug transition joint has: a first internal thread and a sealing surface on the inner side of the upper end; an external thread on the outer side of the lower end; and a through hole and a second internal thread on the inner side from top to bottom.

[0019] The bridge plug transition joint is equipped with the bridge plug ignition control module from bottom to top inside. The upper end of the bridge plug ignition control module is provided with an external thread and a sealing ring that match the through hole of the transition joint and the second internal thread of the transition joint. The lower end of the bridge plug ignition control module is provided with a sealing ring that matches the bridge plug setting tool.

[0020] The bridge plug ignition control module includes: a bridge plug ignition base, a cap connected to the bridge plug ignition base, a partition igniter installed between the cap and the bridge plug ignition base, and a bridge plug ignition contact assembly installed on the cap and communicating with the partition igniter.

[0021] Compared with the above-mentioned background technology, the modular cluster perforation and bridge plug combined tool for oil and gas wells provided by the present invention includes an upper isolation joint, a bridge plug device, and a tool string axially assembled and electrically connected between the two. The tool string is composed of several single cluster tool strings connected end to end and electrically connected. Each single cluster tool string has a modular perforation gun connected end to end and electrically connected and an initiation and control integrated module.

[0022] The aforementioned modular cluster perforation and bridge plug combination tool for oil and gas wells allows for the separation of each module and their high degree of integration. The first three components can be assembled in the pyrotechnics workshop, and through isolated and separate transportation, on-site connection can be easily and quickly completed using only the matching connectors. This eliminates the hidden dangers of on-site storage, use, and handling of pyrotechnics, saves preparation time, improves construction efficiency, and ensures safe construction around the clock. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0024] Figure 1 A simplified schematic diagram of the modular cluster perforation and bridge plug combined tool for oil and gas wells provided in an embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the modular cluster perforation and bridge plug combined tool for oil and gas wells provided in an embodiment of the present invention;

[0026] Figure 3 This is a schematic diagram of the upper isolation joint provided in an embodiment of the present invention;

[0027] Figure 4 This is a schematic diagram of the modular perforating gun provided in the first embodiment of the present invention;

[0028] Figure 5 This is a schematic diagram of the modular perforating gun provided in the second embodiment of the present invention;

[0029] Figure 6 This is a first structural schematic diagram of the detonation and control integrated module provided in an embodiment of the present invention;

[0030] Figure 7 This is a schematic diagram of the second structure of the detonation and control integrated module after it has been rotated 90° according to an embodiment of the present invention.

[0031] Figure 8 This is a schematic diagram of the intermediate isolation joint provided in an embodiment of the present invention;

[0032] Figure 9 This is a schematic diagram of the bridge plug transition joint provided in an embodiment of the present invention;

[0033] Figure 10 This is a schematic diagram of the bridge plug ignition control module provided in an embodiment of the present invention;

[0034] Figure 11 for Figure 2 Enlarged schematic diagram of the upper and middle isolation connector and the first tool string;

[0035] Figure 12 for Figure 2 Enlarged diagram of the beginning and end tool strings in the middle;

[0036] Figure 13 for Figure 2Enlarged schematic diagram of the transition joint between the mid-tail end tool string and the bridge plug.

[0037] in:

[0038] 1-Upper isolating connector, 2-Modular perforating gun, 3-Initiation and control integrated module, 4-Intermediate isolating connector, 5-Pressure ring, 6-Bridge plug transition connector, 7-Bridge plug ignition control module, 8-Bridge plug setting tool, 9-Bridge plug, 10-Single cluster tool string, 11-Head tool string, 12-Tail tool string;

[0039] 21-Modular perforating gun at the front end, 22-Modular perforating gun at the rear end, 31-Integrated module for detonation and control at the front end, 32-Integrated module for detonation and control at the rear end, 41-Intermediate isolating joint at the front end, 42-Intermediate isolating joint at the rear end, 51-Pressure ring at the front end, 52-Pressure ring at the rear end;

[0040] 101-First internal thread of upper connector, 102-External thread of upper connector, 103-Through hole of upper connector, 104-Isolation sealing hole, 105-Second internal thread of upper connector, 106-Lower conduction point, 107-Upper conduction point, 108-Pressure ring;

[0041] 201-Upper contact, 202-Lower contact, 203-Detonating cord, 211-Upper contact at the front end, 212-Lower contact at the front end, 213-Detonating cord at the front end, 221-Upper contact at the rear end, 222-Lower contact at the rear end, 223-Detonating cord at the rear end;

[0042] 301-Input contact, 302-Output contact, 303-Encoded detonator, 304-Output contact seal, 305-Fixing sleeve, 306-Detonator, 307-Encoded switch, 308-Bearing body, 309-Transition insulator, 3010-Input contact assembly, 311-First-end input contact, 312-First-end output contact, 313-First-end encoded detonator, 321-Tail-end input contact, 322-Tail-end output contact, 323-Tail-end encoded detonator;

[0043] 401 - Lower connector first external thread, 402 - Lower connector second external thread, 403 - Expansion hole, 404 - Chamber, 405 - Sealing hole, 406 - Lower connector internal thread;

[0044] 601 - First internal thread of transition joint; 602 - External thread of transition joint; 603 - Through hole of transition joint; 604 - Second internal thread of transition joint;

[0045] 701-Bridge plug ignition contact assembly, 702-Baffle igniter, 703-Cap, 704-Bridge plug ignition base;

[0046] 2111-First gun body, 2112-First magazine rack, 2113-Upper magazine rack plate, 2114-Upper contact assembly, 2115-Lower magazine rack plate, 2116-Lower contact assembly, 2117-Through line;

[0047] 2121-Second gun body, 2122-Second magazine rack, 2123-Insulated upper magazine rack plate, 2124-Upper contact insulating pressure ring, 2125-Insulated lower magazine rack plate, 2126-Bullet with insulating magazine holder firing hole, 2128-Upper compression contact, 2129-Compression conductive spring, 21210-Fixing set screw, 21211-Anti-rotation set screw. Detailed Implementation

[0048] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0049] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0050] Please refer to Figures 1 to 13 ,in, Figure 1 This is a simplified schematic diagram of the modular cluster perforation and bridge plug combined tool for oil and gas wells provided in an embodiment of the present invention. Figure 2 This is a schematic diagram of the modular cluster perforation and bridge plug combined tool for oil and gas wells provided in an embodiment of the present invention. Figure 3 This is a schematic diagram of the upper isolation joint provided in an embodiment of the present invention. Figure 4 This is a schematic diagram of the modular perforating gun provided in the first embodiment of the present invention. Figure 5 This is a schematic diagram of the modular perforating gun provided in the second embodiment of the present invention. Figure 6 This is a first structural schematic diagram of the detonation and control integrated module provided in an embodiment of the present invention. Figure 7 This is a schematic diagram of the second structure of the detonation and control integrated module provided in an embodiment of the present invention after being rotated 90°. Figure 8 This is a schematic diagram of the intermediate isolation joint provided in an embodiment of the present invention. Figure 9 This is a schematic diagram of the bridge plug transition joint provided in an embodiment of the present invention. Figure 10 This is a schematic diagram of the bridge plug ignition control module provided in an embodiment of the present invention. Figure 11 for Figure 2 Enlarged schematic diagram of the upper and middle isolation connector and the first tool string. Figure 12 for Figure 2Enlarged diagram of the beginning and end tool strings. Figure 13 for Figure 2 Enlarged schematic diagram of the transition joint between the mid-tail end tool string and the bridge plug.

[0051] This invention provides a modular cluster perforation and bridge plug combined tool for oil and gas wells, including an upper isolation joint 1, a bridge plug device, and a tool string axially assembled and electrically connected between the two. The tool string consists of several single cluster tool strings 10 connected end to end and electrically connected. Each single cluster tool string 10 has a modular perforation gun 2 connected end to end and electrically connected and an initiation and control integrated module 3.

[0052] It should be noted that the tool string in the above-mentioned modular cluster perforation and bridge plug combined tool for oil and gas wells can be a single cluster tool string 10 with any number of clusters, and should also fall within the scope of this embodiment. Figure 1 The image shows the simplest form of the tools described above, where the toolchain consists of only one cluster of single toolchains 10; for ease of explanation, it is referred to as... Figure 2 Taking the tool shown as an example, the tool string has two clusters of single-cluster tool strings 10, but it does not mean that it can only be composed of two clusters. These two clusters of single-cluster tool strings 10 are named the first-end tool string 11 and the last-end tool string 12. Between the first-end tool string 11 and the last-end tool string 12, any number of single-cluster tool strings 10 can be added, which should also fall within the scope of this embodiment.

[0053] In this embodiment, if the number of single-cluster tool strings 10 in the tool string is n clusters, then the first tool string 11 is the nth cluster, the last tool string 12 is the 1st cluster, and the clusters between the first tool string 11 and the last tool string 12 are the (n-1)th cluster, the (n-2)th cluster, ... the 2nd cluster.

[0054] In this embodiment, the various modules of the tool are separated and highly integrated. The first three components can be assembled in the pyrotechnics workshop. Through isolated and separate transportation, on-site connection can be easily and quickly completed using only the matching connectors. This eliminates the hidden dangers of on-site storage, use, and safekeeping of pyrotechnics, saves preparation time, improves construction efficiency, and ensures safe construction around the clock.

[0055] In one specific embodiment, the single-cluster tool string 10 also has an intermediate isolation joint 4 and a pressure ring 5, the modular perforating gun 2 is connected to the intermediate isolation joint 4, and the detonation and control integrated module 3 is installed in the intermediate isolation joint 4 and fixed by the pressure ring 5.

[0056] Specifically, the intermediate isolation joint 4 is a double male single joint. The upper outer side is provided with the lower joint first external thread 401 and sealing ring, and the lower outer side is provided with the lower joint second external thread 402 and sealing ring. The inner side is provided with the expansion hole 403, the chamber 404, the sealing hole 405 and the lower joint internal thread 406 from top to bottom.

[0057] Taking the intermediate isolation connector 4 of the nth cluster as an example, its upper end is used to directly connect to the modular perforating gun 2 of the nth cluster, and its lower end is used to directly connect to the modular perforating gun 2 of the (n-1)th cluster.

[0058] In this embodiment, the detonation and control integrated module 3 is installed inside the intermediate isolation joint 4 from bottom to top. The detonation and control integrated module 3 has an input contact 301 at the upper end and an output contact 302 at the lower end. The inner chamber of the module is equipped with an coded detonator 303. The upper end of the detonation and control integrated module 3 rests in the chamber 404. The outer side of the pressure ring 5 is provided with an external thread that matches the internal thread 406 of the lower connector. The external thread of the pressure ring 5 is connected to the internal thread 406 of the lower connector at the lower end of the intermediate isolation joint 4 to fix the detonation and control integrated module 3.

[0059] In addition, a sealing ring is provided on the outer side of the lower end of the detonation and control integrated module 3, and a sealing ring is installed, which falls into the sealing hole 405 on the inner side of the lower end of the intermediate isolation joint 4, so as to bear pressure and seal and isolate each cluster of modular perforating guns 2.

[0060] In one specific embodiment, the upper inner side of the upper isolation connector 1 is provided with an upper connector first internal thread 101 and a sealing surface, the lower outer side is provided with an upper connector external thread 102 and a sealing ring, and the interior is provided with an upper connector through hole 103, an isolation sealing hole 104 and an upper connector second internal thread 105 from top to bottom.

[0061] In this embodiment, the isolation sealing hole 104 is installed with the conductive component from the bottom up and fixed with the press-fit ring 108. The lower end of the conductive component is provided with a lower conductive point 106 and the upper end is provided with an upper conductive line or upper conductive point 107. A pressure-bearing sealing ring is provided on the outside of the conductive component to provide pressure-bearing sealing and isolation between the upper and lower ends. The press-fit ring 108 is provided with an external thread and the upper connector second internal thread 105 of the upper isolation connector 1.

[0062] In one specific embodiment, the modular perforating gun 2 has internal threads and sealing surfaces at both the upper and lower ends, and a cartridge holder is installed inside. The cartridge holder is equipped with perforating bullets and wrapped with detonating cord 203. The upper and lower ends of the cartridge holder are provided with cartridge holder discs, which have upper contact 201 and lower contact 202 respectively. The detonating cord 203 passes through the lower contact 202.

[0063] It should be noted that there are multiple ways to implement the above-mentioned modular perforating gun 2, including modular perforating guns for cluster perforation of oil and gas wells and wireless modular perforating guns, which should all fall within the scope of this embodiment.

[0064] In a first embodiment of the modular perforating gun 2, the modular perforating gun 2 includes a first gun body 2111, a first magazine 2112, an upper magazine tray 2113 and a lower magazine tray 2115. The upper magazine tray 2113 and the lower magazine tray 2115 are respectively equipped with an upper contact assembly 2114 and a lower contact assembly 2116. The first magazine 2112 is wound with a through line 2117 connecting the upper contact assembly 2114 and the lower contact assembly 2116.

[0065] In this embodiment, both the upper contact assembly 2114 and the lower contact assembly 2116 are installed by means of threaded connection. The contact assembly has the characteristics of elastic contraction and conduction. The upper magazine plate 2113 and the lower magazine plate 2115 can be connected to the first magazine 2112 by means of fasteners. The upper magazine plate 2113 and the lower magazine plate 2115 are fixed after being snapped into the first gun body 2111.

[0066] In the second embodiment of the modular perforating gun 2, the modular perforating gun 2 includes a second gun body 2121, a second cartridge holder 2122, an insulated upper cartridge holder plate 2123, and an insulated lower cartridge holder plate 2125. The second cartridge holder 2122 is a conductor, and an upper contact protrusion post and a lower contact protrusion post are respectively provided at the upper and lower ends of the second cartridge holder 2122. The upper contact protrusion post is equipped with a compression conductive spring 2129, an upper compression contact 2128, and an upper contact insulating pressure ring 2124. The perforating bullet is a perforating bullet 2126 with an insulated cartridge holder. The cartridge holder and the cartridge holder plate are connected and fixed by a fixing set screw 21210. The insulated upper cartridge holder plate 2123 has an anti-rotation protrusion key that matches the inner wall of the second gun body 2121. The insulated lower cartridge holder plate 2125 is positioned with the second gun body 2121 by an anti-rotation set screw 21211.

[0067] In this embodiment, similar to the first embodiment of the modular perforating gun 2 described above, the difference is that in the second embodiment of the modular perforating gun 2, the second cartridge 2122 is a conductor, with conductive upper contact protrusions and lower contact protrusions welded to both ends. The lower contact protrusions function similarly to the lower contact assembly 2116. A conductive component that functions similarly to the upper contact assembly 2114 is installed on the upper contact protrusion, consisting of a compression conductive spring 2129, an upper compression contact 2128, and an upper contact insulating pressure ring 2124. This compresses the compression conductive spring 2129 and the upper compression contact 2128, and connects the upper compression contact 2128, the compression conductive spring 2129, the upper contact protrusion, the second cartridge 2122, and the lower contact protrusion.

[0068] In one specific embodiment, the detonation and control integrated module 3 includes a support body 308, an input contact assembly 3010 and an output contact seal 304 respectively installed at the upper and lower ends of the support body 308, a detonator 306 and an encoding switch 307 installed inside the support body 308 and forming an encoding detonator 303; the input contact assembly 3010 and the output contact seal 304 respectively have an input contact 301 and an output contact 302 that communicate with the encoding switch 307, and the encoding switch 307 is connected to the detonator 306.

[0069] In this embodiment, a transition insulator 309 is installed on the support body 308. The transition insulator 309 is installed at the upper end of the support body 308. The input contact assembly 3010 is installed at the upper end along with the transition insulator 309. The output contact seal 304 is installed at the lower end of the support body 308. A detonator 306 is installed on the transition insulator 309 through a fixing sleeve 305. The positive and negative terminals of the detonator of the coding switch 307 are both connected to the detonator 306. The input terminal of the coding switch 307 is connected to the input contact assembly 3010. The output terminal of the coding switch 307 is connected to the output contact seal 304. The ground terminal of the coding switch 307 is connected to the support body 308.

[0070] In one specific embodiment, the bridge plug device includes a bridge plug transition joint 6, a bridge plug ignition control module 7, a bridge plug setting tool 8, and a bridge plug 9. The bridge plug ignition control module 7 is installed on the bridge plug transition joint 6. The upper end of the bridge plug transition joint 6 is connected to a single cluster tool string 10, and the lower end is connected to the bridge plug 9 through the bridge plug setting tool 8.

[0071] Specifically, the upper inner side of the bridge plug transition joint 6 is provided with a first internal thread 601 and a sealing surface, the lower outer side is provided with an external thread 602 for connecting the bridge plug setting tool 8, and the inner side is provided with a transition joint through hole 603 and a second internal thread 604 from top to bottom. The side of the transition joint through hole 603 is smooth.

[0072] In this embodiment, the bridge plug transition joint 6 is equipped with a bridge plug ignition control module 7 from bottom to top inside. The upper end of the bridge plug ignition control module 7 is provided with an external thread and a sealing ring, which matches the through hole 603 of the transition joint and the second internal thread 604 of the transition joint, and provides pressure-bearing sealing to isolate the inside and outside. The lower end of the bridge plug ignition control module 7 is provided with a sealing ring, which matches the bridge plug setting tool 8, and provides pressure-bearing sealing to isolate the inside and outside.

[0073] In addition, the bridge plug ignition control module 7 has a bridge plug ignition contact assembly 701 at the upper end and a baffle igniter 702 at the lower end, which is used to ignite the slow-burning gunpowder of the bridge plug to realize the work of the bridge plug setting tool 8 and the release of the bridge plug 9 from the setting.

[0074] Specifically, the bridge plug ignition control module 7 includes a bridge plug ignition base 704, a cap 703 connected to the bridge plug ignition base 704, a partition igniter 702 installed between the cap 703 and the bridge plug ignition base 704, and a bridge plug ignition contact assembly 701 installed on the cap 703 and connected to the partition igniter 702.

[0075] The aforementioned tool provides a modular cluster perforation and bridge plug integration technology for oil and gas wells. It separates the plug-and-play initiation and control integrated module 3 for cluster perforation, the bridge plug ignition control module 7, and the modular perforation gun 2 for cluster perforation, achieving a high degree of integration for each. The first three components can be assembled in the pyrotechnics workshop, which plays a crucial role in shortening the tool string length, simplifying transition wiring links, eliminating transportation safety issues, and improving on-site usability. Among them, the intermediate isolation joint 4 and the bridge plug transition joint 6 can effectively shorten the length by more than 2 times, providing design technical support for increasing the number of clusters in the system. It features high safety and reliability, ease of implementation, and low manufacturing cost.

[0076] In this embodiment, the above-mentioned tool consists of an upper isolation joint 1, an n-cluster modular perforating gun 2, an n-cluster detonation and control integrated module 3, an n-cluster intermediate isolation joint 4, an n-cluster pressure ring 5, a bridge plug transition joint 6, a bridge plug ignition control module 7, a bridge plug setting tool 8, and a bridge plug 9.

[0077] The entire system is divided into three parts: n-cluster modular perforating guns 2, n-cluster initiation and control integrated modules 3, and bridge plug ignition control module 7. Each part can be assembled in the workshop, allowing for the separate transport of perforating projectiles and detonators. Upon arrival at the construction site, only the uppermost n-cluster modular perforating gun 2 needs to be connected to the isolation connector 1. The n-cluster modular perforating gun 2 is connected to the n-cluster initiation and control integrated module 3 through the n-cluster intermediate isolation connector 4, where the initiation and control integrated module 3 is installed inside the intermediate isolation connector 4 and fixed with a pressure ring 5. The lower end of the lowermost first-cluster intermediate isolation connector 4 is connected to the bridge plug transition connector 6, where the bridge plug ignition control module 7 is installed. The lower end of the bridge plug transition connector 6 is connected to the bridge plug setting tool 8, and then to the bridge plug 9.

[0078] Specifically, the upper isolation connector 1 is connected to the upper end of the uppermost cluster of modular perforating guns 2 through its internal and external threads; the n clusters of modular perforating guns 2 and the n clusters of detonation and control integrated modules 3 are connected together in sequence through the internal and external threads of the n clusters of intermediate isolation connectors 4, and the n clusters of detonation and control integrated modules 3 are pressed and fixed in the n clusters of intermediate isolation connectors 4 by pressure rings 5; the bridge plug ignition control module 7 is connected to the lower end of the lowermost cluster of intermediate isolation connectors 4 through the internal and external threads of the bridge plug transition connector 6, and the bridge plug setting tool 8 is connected to the lower end of the bridge plug transition connector 6 through its internal and external threads, and the lower end of the bridge plug setting tool 8 is connected to the bridge plug 9.

[0079] More specifically, Figure 2 The first tool string 11 consists of a first-end modular perforating gun 21, a first-end detonation and control integrated module 31, a first-end intermediate isolation joint 41, and a first-end pressure ring 51, corresponding to a first-end detonating cord 213 and a first-end coded detonator 313; the last tool string 12 consists of a last-end modular perforating gun 22, a last-end detonation and control integrated module 32, a last-end intermediate isolation joint 42, and a last-end pressure ring 52, corresponding to a last-end detonating cord 223 and a last-end coded detonator 323; the first tool string 11 and the last tool string 12 are connected by the (n-1)th cluster, the (n-2)th cluster, ..., the 2nd cluster.

[0080] The system's contact conduction mechanism is as follows: When the lower end of the upper isolating connector 1 is connected to the upper end of the first-end modular perforating gun 21, the lower conduction point 106 is in compression contact with the first-end upper contact 211; when the lower end of the first-end modular perforating gun 21 is connected to the upper end of the detonation and first-end detonation and control integrated module 31, the first-end lower contact 212 is in compression contact with the first-end input contact 311; when the lower end of the first-end detonation and control integrated module 31 is connected to the upper end of the next cluster, i.e., the (n-1)th cluster of modular perforating guns 2, the first-end output contact 312 is in compression contact with the upper contact 211 of the (n-1)th cluster. 01 is compressed into a contact connection; and so on, until the second cluster is connected to the tail tool string 12, the output contact 302 of the second cluster is compressed into a contact connection with the upper contact 221 of the tail end, and the lower contact 222 of the tail end is compressed into a contact connection with the input contact 321 of the tail end; when the tail initiation and control integrated module 32 is connected to the upper end of the bridge plug ignition control module 7, the output contact 322 of the tail end is compressed into a contact connection with the bridge plug ignition contact assembly 701; through this series of contact compression connections, the original technology of using side window wiring is eliminated, the wiring links are simplified, and the system length is shortened.

[0081] The system's detonation transmission mechanism is as follows: When the lower end of the nth cluster modular perforating gun 2 is connected to the upper end of the nth cluster detonation and control integrated module 3, the detonating cord 203 at the lower end of the modular perforating gun 2 is inserted into the through hole inside the guide tube of the detonation and control integrated module 3, and is axially close to and parallel to the coded detonator 303, with a distance much smaller than the safe detonation transmission distance.

[0082] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0083] The modular cluster perforation and bridge plug combined tool for oil and gas wells provided by this invention has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this invention. It should be noted that those skilled in the art can make several improvements and modifications to this invention without departing from the principles of this invention, and these improvements and modifications also fall within the protection scope of the claims of this invention.

Claims

1. A modular cluster perforation and bridge plug combined tool for oil and gas wells, characterized in that, It includes an upper isolation joint (1), a bridge plug device, and an electrically conductive tool string axially assembled between the two. The tool string consists of several electrically conductive single-cluster tool strings (10) connected end to end. Each single-cluster tool string (10) has a modular perforating gun (2) connected end to end and electrically conductive, and an initiation and control integrated module (3). The single-cluster tool string (10) also has an intermediate isolation joint (4) and a pressure ring (5), the modular perforating gun (2) is connected to the intermediate isolation joint (4), and the detonation and control integrated module (3) is installed in the intermediate isolation joint (4) and fixed by the pressure ring (5); The upper outer side of the intermediate isolation joint (4) is provided with a lower connector first external thread (401) and a sealing ring; the lower outer side of the intermediate isolation joint (4) is provided with a lower connector second external thread (402) and a sealing ring; the inner side of the intermediate isolation joint (4) is provided with an expansion hole (403), a chamber (404), a sealing hole (405) and a lower connector internal thread (406) from top to bottom. The detonation and control integrated module (3) is installed inside the intermediate isolation joint (4) from bottom to top. The upper end of the detonation and control integrated module (3) rests in the chamber (404). The outer side of the pressure ring (5) is provided with an external thread that matches the internal thread (406) of the lower joint. A sealing ring is provided on the outer side of the lower end of the detonation and control integrated module (3). The sealing ring is equipped with a sealing ring and rests in the sealing hole (405). The upper isolation connector (1) has an upper connector first internal thread (101) and a sealing surface on the inner side of its upper end; an upper connector external thread (102) and a sealing ring on the outer side of its lower end; and an upper connector through hole (103), an isolation sealing hole (104) and an upper connector second internal thread (105) are arranged sequentially from top to bottom inside the upper isolation connector (1). The isolation sealing hole (104) is installed with a conductive component from the bottom up and fixed with a press-fit ring (108). The lower end of the conductive component is provided with a lower conductive point (106) and the upper end is provided with an upper conductive line or upper conductive point (107). The outer side of the conductive component is provided with a pressure-bearing sealing ring for isolating the upper and lower ends. The press-fit ring (108) is provided with an external thread and the upper connector second internal thread (105) of the upper isolation connector (1).

2. The modular cluster perforation and bridge plug combined tool for oil and gas wells according to claim 1, characterized in that, The modular perforating gun (2) has internal threads and sealing surfaces at both ends and a cartridge rack inside. The cartridge rack is equipped with perforating bullets and wrapped with detonating cord (203). The cartridge rack is provided with cartridge rack discs at both ends. The cartridge rack discs have an upper contact point (201) and a lower contact point (202) respectively. The detonating cord (203) passes through the lower contact point (202).

3. The modular cluster perforation and bridge plug combined tool for oil and gas wells according to claim 2, characterized in that, The modular perforating gun (2) includes a first gun body (2111), a first magazine (2112), an upper magazine tray (2113), and a lower magazine tray (2115). The upper magazine tray (2113) and the lower magazine tray (2115) are respectively equipped with an upper contact assembly (2114) and a lower contact assembly (2116). The first magazine (2112) is wound with a through line (2117) connecting the upper contact assembly (2114) and the lower contact assembly (2116).

4. The modular cluster perforation and bridge plug combined tool for oil and gas wells according to claim 3, characterized in that, The modular perforating gun (2) includes a second gun body (2121), a second magazine (2122), an insulated upper magazine tray (2123), and an insulated lower magazine tray (2125). The second magazine (2122) is a conductor. The upper and lower ends of the second magazine (2122) are respectively provided with an upper contact protrusion post and a lower contact protrusion post. The upper contact protrusion post is equipped with a compression conductive spring (2129), an upper compression contact (2128), and an upper contact insulating pressure ring (2124).

5. The modular cluster perforation and bridge plug combined tool for oil and gas wells according to claim 1, characterized in that, The detonation and control integrated module (3) includes: a support body (308), an input contact assembly (3010) and an output contact seal (304) respectively installed at the upper and lower ends of the support body (308), a detonator (306) and an encoding switch (307) installed inside the support body (308); the input contact assembly (3010) and the output contact seal (304) respectively have an input contact (301) and an output contact (302) connected to the encoding switch (307), and the encoding switch (307) is connected to the detonator (306).

6. The modular cluster perforation and bridge plug combined tool for oil and gas wells according to any one of claims 1 to 5, characterized in that, The bridge plug device includes a bridge plug transition joint (6), a bridge plug ignition control module (7), a bridge plug setting tool (8), and a bridge plug (9). The bridge plug ignition control module (7) is installed on the bridge plug transition joint (6). The upper end of the bridge plug transition joint (6) is connected to the single cluster tool string (10), and the lower end is connected to the bridge plug (9) through the bridge plug setting tool (8).

7. The modular cluster perforation and bridge plug combined tool for oil and gas wells according to claim 6, characterized in that, The bridge plug transition joint (6) has a first internal thread (601) and a sealing surface on the inner side of its upper end; the bridge plug transition joint (6) has an external thread (602) on the outer side of its lower end; and the bridge plug transition joint (6) has a through hole (603) and a second internal thread (604) on its inner side from top to bottom. The bridge plug transition joint (6) is installed from bottom to top inside the bridge plug ignition control module (7). The upper end of the bridge plug ignition control module (7) is provided with an external thread and a sealing ring. The external thread matches the second internal thread (604) of the transition joint. The sealing ring matches the through hole (603) of the transition joint. The lower end of the bridge plug ignition control module (7) is provided with a sealing ring that matches the bridge plug setting tool (8). The bridge plug ignition control module (7) includes: a bridge plug ignition base (704), a cap (703) connected to the bridge plug ignition base (704), a partition igniter (702) installed between the cap (703) and the bridge plug ignition base (704), and a bridge plug ignition contact assembly (701) installed on the cap (703) and connected to the partition igniter (702).

Images