Field zero wiring device for a perforating gun

Abstract

The application discloses a field zero wiring device of a perforating gun, which comprises at least two detonator fixing grooves, and the zero wiring electric conduction is completed through clamping an A conductive copper ring and a B conductive copper ring respectively; the circuit board fixing groove is provided with at least two buckle structures, and the circuit board fixing groove is electrically connected and fixed with a selective firing switch through the buckle structures; and an electric connection wire between the detonator fixing groove and the circuit board fixing groove is prefabricated; the electric connection is realized through the buckle structure, wiring during field installation is avoided, installation efficiency is greatly improved, and the error rate of wiring is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of intelligent control technology of bridge plug and perforating in oil and gas exploitation, and particularly relates to a field zero wiring device of a perforating gun. BACKGROUND

[0002] In the process of oil and gas exploitation, casing is usually lowered after drilling, and cement is injected for well cementation. After well cementation, the connection path between the oil and gas layer and the casing is opened through perforating and fracturing operation. Bridge plug and perforating are the most widely used perforating completion method in unconventional oil and gas reservoir development, which can effectively improve single well production.

[0003] The perforating instrument string carries multiple perforating guns and is lowered into the casing well to stay at the position of one or more oil and gas layers in the underground rock layer. The perforating gun has shaped charges inside. After the shaped charges are detonated, they will successively perforate the perforating gun tube, the casing and the cement layer, so that hydrocarbons can flow into the casing. Once the perforating gun reaches the designated position, the ground instrument sends a firing signal and a selective firing switch to detonate the detonator in the perforating gun, and then ignites the detonating cord, which detonates the shaped charges to perforate the gun tube, the casing and the cement layer, thereby allowing the formation fluid to flow into the production pipe.

[0004] The assembly of the perforating gun requires the assembly of multiple parts, usually including at least the following components: gun tube, cartridge holder, wired detonator, fuse, shaped charge, selective firing switch, intermediate joint, pressure-bearing wire passer. At least two wires need to be manually connected between the wired detonator and the selective firing switch. At least one wire needs to be connected between the selective firing switch and the selective firing switch in the next stage perforating gun assembly. At least one wire needs to be connected between the selective firing switch and the cartridge holder. At least one wire needs to be connected between the selective firing switch and the pressure-bearing wire passer. The gun tubes are connected to each other through the intermediate joint, and relative rotation is required during connection. When one component is screwed into another component, the wires are often tangled, knotted or even broken. In addition, when using a wired detonator, it must be manually connected to the electrical wiring, which can cause a number of problems. Due to the rotational assembly of the parts, the wiring can be worn, kinked, wrinkled or cracked, and manual wiring can easily cause rework. SUMMARY

[0005] To solve the above problems, the present application provides a field zero wiring device of a perforating gun, provides a detonator conductive ring and a conductive groove, and installs a selective firing switch into an insulating fixed groove to complete all wiring operations in the factory. Field zero wiring is achieved. Many faults caused by wiring are avoided.

[0006] To achieve the above purpose, the present application adopts the following technical solutions:

[0007] A field zero wiring device of a perforating gun, comprising a detonator, a detonator clamp cylinder for mounting the detonator, and a cartridge tube, a wiring assembly is arranged in the cartridge tube;

[0008] The detonator clamp cylinder is a tubular hollow cylinder structure, the detonator clamp cylinder contains an A wiring post, a B wiring post, an A conductive copper ring, and a B conductive copper ring; the A wiring post and the B wiring post are elastic clamping structures, and the A conductive copper ring and the B conductive copper ring are arranged outside the detonator clamp cylinder; the A wiring post and the A conductive copper ring are connected by a wire, and the B wiring post and the B conductive copper ring are connected by a wire; the ground wire of the detonator is fixed to the A wiring post by a clamping structure, and the detonating cord is fixed to the B wiring post by a clamping structure;

[0009] The wiring assembly includes an intermediate joint, a conductive contact slot, an insulating box, a through wire for power supply, and a selection switch for a selection control circuit, the wiring assembly for insulation and support is fixed in the cartridge tube, the wiring assembly is provided with a detonator fixing slot and a circuit board fixing slot, the detonator fixing slot is electrically connected and fixed to the detonator clamp cylinder through a buckle structure, specifically, the detonator fixing slot has at least two, respectively clamping the A conductive copper ring and the B conductive copper ring to complete zero wiring electric conduction.

[0010] The circuit board fixing slot is provided with at least two buckle structures, and the circuit board fixing slot is electrically connected and fixed to the selection switch through the buckle structure. The electrical connection wire between the detonator fixing slot and the circuit board fixing slot is prefabricated.

[0011] A perforating gun adopts the field zero wiring device of the perforating gun, comprising a perforating gun tube, a cartridge tube, a detonator clamp cylinder, a wiring assembly, and an intermediate joint assembly for connecting each section of the perforating gun, which are sequentially arranged in the perforating gun tube; the cartridge tube is a cylindrical structure, the barrel wall is provided with a through hole for blasting, and the cartridge tube is internally provided with a shaped charge perforating bullet; the detonator clamp cylinder is internally provided with a detonator, and the detonator is connected with a fuse; the other end of the fuse is connected with the shaped charge perforating bullet; an ignition signal is conducted to the wiring assembly through the intermediate joint assembly and detonates the detonator through the detonator clamp cylinder, finally making the detonator detonate the shaped charge perforating bullet through the fuse, and the shaped charge perforating bullet is shot after detonation.

[0012] In the perforating gun, the intermediate joint assembly includes a pressure-bearing wire passer, a hollow fixing screw, and a threaded joint, the hollow fixing screw is arranged at the top end of the perforating gun, and the hollow fixing screw is fixed to the pressure-bearing wire passer through threaded connection of the threaded joint;

[0013] The tail end of the perforating gun is provided with a cartridge connector for connecting the circuit, the cartridge connector includes a lower cartridge connector and an upper cartridge connector; further including an elastic metal contact disc for electrical connection, the lower cartridge connector and the pressure-bearing wire passer are electrically connected through the metal contact disc, and the pressure-bearing wire passer and the upper cartridge connector are electrically connected through the metal contact disc.

[0014] The beneficial effects of the application are:

[0015] The detonator fixing groove is electrically connected and fixed with the detonator clamp cylinder through the buckle structure, the circuit board fixing groove is electrically connected and fixed with the selected firing switch through the buckle structure, the electric connection wire between the detonator fixing groove and the circuit board fixing groove is prepared, the electric connection is realized through the buckle structure, the wiring in the field installation is avoided, the installation efficiency is greatly improved, and the wiring error rate is reduced. The detonator connecting clamp wire is connected to the point through the copper pipe of the conductive slip ring. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a structure principle schematic diagram of the perforating gun of the application

[0017] Figure 2 It is a structure principle schematic diagram of the field zero wiring device of the perforating gun of the application.

[0018] In the figure:

[0019] 1-detonator clamp cylinder; 101-A wiring post; 102-B wiring post; 103-A conductive copper ring; 104-B conductive copper ring; 2-perforating gun tube; 3-wiring assembly; 301-upper chuck; 302-intermediate joint; 303-conductive contact clamping groove; 304-insulating box; 305-through wire; 306-lower rack connector; 307-upper rack connector; 308-selected firing switch; 309-rack tube; 310-metal contact disc; 4-intermediate joint assembly; 401-pressure bearing wire passer; 402-hollow fixing screw; 403-threaded joint; 6-rack; 7-fixing groove; 701-detonator fixing groove; 702-circuit board fixing groove; 8-detonator; 9-fuse; 10- shaped charge. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the application more clear and obvious, the application will be further described in detail below with reference to the drawings. It should be understood that the specific embodiments described herein are only used to explain the application and do not limit the application.

[0021] Reference Figure 1 and Figure 2The application provides a field zero wiring device of a perforating gun, which comprises a perforating gun pipe 2, a cartridge pipe 6, a detonator clamp cylinder 1, a wiring assembly 3 and an intermediate joint assembly 4 arranged in the perforating gun pipe 2 in sequence; the cartridge pipe 6 is a cylindrical structure, a through hole for blasting is arranged on the cylinder wall, and a shaped charge 10 is arranged in the cartridge pipe 6; the detonator clamp cylinder 1 is provided with a detonator 8, the detonator 8 is connected with a fuse 9, the other end of the fuse 9 is connected with the shaped charge 10, the intermediate joint assembly 4 detonates the detonator 8 through the detonator clamp cylinder 1, finally makes the detonator 8 detonate the shaped charge 10 through the fuse 9, and the shaped charge 10 will successively perforate the perforating gun pipe 2, a casing and a cement pouring layer after being detonated, so that hydrocarbons can flow into the casing to facilitate mining.

[0022] The detonator clamp cylinder 1 is loaded with an existing common detonator 8, the detonator clamp cylinder 1 is a tubular hollow cylinder structure, the detonator 8 is inserted into the inside of the detonator clamp cylinder 1, the inner dimension of the detonator clamp cylinder 1 can be customized according to the dimension of detonators of different detonator manufacturers, the detonator clamp cylinder 1 comprises an A wiring column 101, a B wiring column 102, an A conductive copper ring 103 and a B conductive copper ring 104, the A wiring column 101 and the A conductive copper ring 103 are connected through a wire, and the B wiring column 102 and the B conductive copper ring 104 are connected through a wire. The A wiring column 101 and the B wiring column 102 are elastically clamped structures and are arranged on both sides of the top end of the detonator clamp cylinder 1, and the A conductive copper ring 103 and the B conductive copper ring 104 are arranged around the outside of the detonator clamp cylinder 1; the ground wire of the detonator 8 is fixed to the A wiring column 101 through the clamping structure, and the initiating wire is fixed to the B wiring column 102 through the clamping structure.

[0023] The wiring assembly 3 comprises an upper chuck 301, an intermediate joint 302, a conductive contact clamping groove 303, an insulating box 304, a through wire 305 for power supply, a lower cartridge connector 306, an upper cartridge connector 307, a selection switch 308 for a selection and control circuit, and the cartridge pipe 6, the upper chuck 301 and a lower chuck (not marked in the figure) are welded and fixed to the two ends of the cartridge pipe 6, and the insulating box 304 is fixed to one end of the cartridge pipe 6 connected with the intermediate joint 302 through a screw.

[0024] The wiring assembly 3 for insulation and support is fixed into the cartridge pipe 6, the wiring assembly 3 is provided with a detonator fixing groove 701 and a circuit board fixing groove 702, the detonator fixing groove 701 is electrically connected and fixed with the detonator clamp cylinder 1 through a buckle structure, specifically, the detonator fixing groove 701 has at least two, and zero wiring electric conduction is completed by clamping the A conductive copper ring 103 and the B conductive copper ring 104.

[0025] The circuit board fixing groove 702 is provided with at least two buckle structures, the circuit board fixing groove 702 is electrically connected and fixed with the selection switch 308 through the buckle structure, and an electric connection wire between the detonator fixing groove 701 and the circuit board fixing groove 702 is prefabricated

[0026] The upper rack connector 307 is mounted to the upper chuck 301, and further comprises a wire and a metal contact pad 310, one end of the wire being connected to the input end of the circuit board fixing groove 702 and the other end being connected to the metal contact pad 310.

[0027] The lower rack connector 306 is mounted to the intermediate joint 302, and further comprises a wire and a metal contact pad 310, one end of the wire being connected to the output end of the circuit board fixing groove 702 and the other end being connected to the metal contact pad 310.

[0028] The selection switch 308 is used for receiving the control signal of the ground control instrument and outputting the detonator 8 initiation signal to the detonator 8 initiation end and outputting the cascade signal to the next stage selection switch 308, and the ground wire of the selection switch 308 is fixed to the rack by a screw.

[0029] The pressure-bearing wire passer 401 is mounted in the intermediate joint 302 and is used for conducting the lower rack connector 306 of the current stage perforating gun and the upper rack connector 307 of the next stage perforating gun. The pressure-bearing wire passer 401 comprises an upper conductive thimble, a lower conductive thimble, an upper conductive spring, a lower conductive spring, a middle pressure-bearing conductive block, an upper pressure-bearing insulating shell and a lower pressure-bearing insulating shell.

[0030] The intermediate joint 302 is used for connecting two-stage perforating guns.

[0031] The intermediate joint assembly 4 comprises the pressure-bearing wire passer 401, a hollow fixing screw 402 and a threaded joint 403, the hollow fixing screw 402 is arranged at the top end of the perforating gun, the hollow fixing screw 402 is threadedly connected with the threaded joint 403 and is used for fixing the pressure-bearing wire passer 401.

[0032] The perforating gun is provided with the rack connector and the pressure-bearing wire passer 401 for connecting the circuit at both ends, the rack connector comprises the lower rack connector 306 and the upper rack connector 307, the lower rack connector 306 and the pressure-bearing wire passer 401 are electrically connected through the metal contact pad 310, and the pressure-bearing wire passer 401 and the upper rack connector 307 are electrically connected through the metal contact pad 310.

[0033] The perforating gun assembly is assembled and the reliable transmission between signals is realized without using wired electrical connection.

[0034] The above is the further detailed description of the present application in combination with the specific embodiments, and the specific implementation of the present application cannot be limited to the above. For the ordinary skilled in the art to which the present application belongs, the equivalent substitutions or obvious variations are made without departing from the concept of the present application, and the performance or use is the same, which should be regarded as belonging to the patent protection range of the present application determined by the submitted claims.

Claims

1. A field zero make-up device for a perforating gun, characterized by: It comprises a detonator (8), a detonator holder (1) for mounting the detonator (8), and a carrier tube (6), and a wiring assembly (3) is arranged in the carrier tube (6); The detonator holder (1) is a tubular hollow cylinder structure, and the detonator holder (1) comprises an A wiring post (101), a B wiring post (102), an A conductive copper ring (103), and a B conductive copper ring (104); the A wiring post (101) and the B wiring post (102) are arranged on both sides of the top end of the detonator holder (1) in an elastic clamping structure, and the A conductive copper ring (103) and the B conductive copper ring (104) are arranged outside the detonator holder (1); the A wiring post (101) and the A conductive copper ring (103) are connected by a wire, and the B wiring post (102) and the B conductive copper ring (104) are connected by a wire; the ground wire of the detonator (8) is fixed to the A wiring post (101) by a clamping structure, and the detonating cord is fixed to the B wiring post (102) by a clamping structure; The wiring assembly (3) comprises a middle joint (302), a conductive contact slot (303), an insulating box (304), a through wire (305) for power supply, and a selection switch (308) for a selection control circuit, and the wiring assembly (3) is fixed in the carrier tube (6) for insulation and support; the wiring assembly (3) is provided with a detonator fixing groove (701) and a circuit board fixing groove (702), the detonator fixing groove (701) is electrically connected and fixed to the detonator holder (1) by a buckle structure, and specifically, the detonator fixing groove (701) has at least two, which clamps the A conductive copper ring (103) and the B conductive copper ring (104) to complete zero wiring electric conduction; The circuit board fixing groove (702) is provided with at least two buckle structures, the circuit board fixing groove (702) is electrically connected and fixed to the selection switch (308) by a buckle structure, and an electric connection wire between the detonator fixing groove (701) and the circuit board fixing groove (702) is prefabricated.

2. A perforating gun, characterized by: The field zero wiring device of the perforating gun comprises a perforating gun tube (2), a carrier tube (6), a detonator holder (1), a wiring assembly (3), and a middle joint assembly (4) for connecting each section of the perforating gun, which are arranged in the perforating gun tube (2) in sequence; the carrier tube (6) is a cylindrical structure, and a through hole for blasting is arranged on the cylinder wall; the carrier tube (6) is internally provided with a shaped charge (10); the detonator holder (1) is internally provided with a detonator (8), and the detonator (8) is connected with a fuse (9); the other end of the fuse (9) is connected with the shaped charge (10); an initiation signal is conducted to the wiring assembly (3) through the middle joint assembly (4) and detonates the detonator (8) through the detonator holder (1), so that the detonator (8) detonates the shaped charge (10) through the fuse (9), and the shaped charge (10) is shot through the perforating gun tube (2) after being detonated.

3. The perforating gun of claim 2, wherein: The intermediate joint assembly (4) comprises a pressure-bearing wire pass-through device (401), a hollow fixing screw (402) and a threaded joint (403), the hollow fixing screw (402) is arranged at the top end of the perforating gun, the hollow fixing screw (402) is connected with the threaded joint (403) through thread connection to fix the pressure-bearing wire pass-through device (401); The tail end of the perforating gun is provided with a magazine connector for connecting a circuit, the magazine connector comprises a lower magazine connector (306) and an upper magazine connector (307); further comprising an elastic metal contact disc (310) for electrical connection, the lower magazine connector (306) and the pressure-bearing wire pass-through device (401) are electrically connected in contact through the metal contact disc (310), and the pressure-bearing wire pass-through device (401) and the upper magazine connector (307) are electrically connected in contact through the metal contact disc (310).

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