Impact type electric ignition device

Abstract

The invention discloses an impact type electric ignition device, which adopts a design concept of a non-explosion route, is convenient in percussion process, and enables the fire reduction of a product to be industrial, so that the safety of transportation, storage and use is greatly improved. Through energy conversion, development and application of a novel underground ignition technology of an oil and gas field are promoted, the device can be used as a substitute of an impact igniter cap, the research thought of the ignition technology is widened, and the device is suitable for large-scale industrial use and popularization.

Description

Technical Field

[0001] The invention belongs to the technical field of oil and gas well casing repair and well repair, and in particular relates to an impact type electric ignition device. Background Art

[0002] During the well repair and repair of oil and gas well casing, the ignition device is the key component to ensure the successful ignition of the ignition at one time, and must meet the requirements of safe and reliable ignition. Traditionally, the ignition is generally carried out by the impact of the firing pin firing the detonator, and the detonator is a fire workpiece and a civilian explosive. There are problems such as cumbersome procedures, inconvenient storage and transportation, and the safety cannot be guaranteed, which affects the promotion and use of the product.

[0003] At present, it is an inevitable trend to find a new non-explosive substitute to replace the use function of pyrotechnics. In the oil and gas well industry, the impact electric ignition device is a new ignition technology, which is in an undeveloped state and has no technical data and application results to refer to. Therefore, a new non-explosive ignition device is urgently needed to solve the above-mentioned technical problems. Summary of the invention

[0004] The object of the present invention is to provide an impact-type electric ignition device to solve the problems of complicated procedures, inconvenient storage and transportation, and poor safety of the ignition device in the prior art.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions to achieve the above problems:

[0006] An impact-type electric ignition device comprises a mounting shell, wherein a firing assembly, a switch assembly and an ignition device are sequentially connected inside the mounting shell;

[0007] The firing assembly includes a firing pin sleeve installed at the rear of the mounting shell; a firing pin is installed inside the firing pin sleeve, and the rear of the firing pin extends out of the rear end of the firing pin sleeve; the firing assembly also includes a firing pin pin, which penetrates the side wall of the firing pin sleeve and is connected to the firing pin;

[0008] The switch assembly comprises a switch seat arranged in the middle of the mounting housing, a switch spacer is arranged at the rear of the switch seat, and the switch spacer contacts the front of the firing pin sleeve;

[0009] A battery housing is provided at the front of the switch seat, a negative electrode cap is provided at one end of the battery housing near the switch spacer, and a positive electrode cap is provided at the other end of the battery housing; batteries and circuit boards are installed in sequence from back to front in the battery housing;

[0010] When the firing pin strikes the switch spacer, the switch spacer can be deformed, thereby causing the switch spacer to be conductive with the negative electrode cap;

[0011] The rear part of the ignition device is arranged in the front part of the mounting shell, and the front part of the ignition device extends out of the front end of the mounting shell; the positive electrode cap of the battery shell contacts the ignition device;

[0012] The central axes of the firing pin, battery housing and ignition device are colinear.

[0013] The present invention also has the following features:

[0014] Furthermore, a pressure cap is arranged at the rear of the ignition device; an igniter is arranged inside the pressure cap, and the positive electrode cap of the battery housing is in contact with the igniter of the ignition device.

[0015] Furthermore, an O-ring is provided between the pressure cap and the igniter.

[0016] Furthermore, an O-ring is provided between the ignition device and the mounting housing.

[0017] Furthermore, the switch spacer is a copper switch spacer.

[0018] Furthermore, a limit ring is arranged inside the installation shell; the specifications of the front part of the battery shell match the specifications of the inner ring of the limit ring;

[0019] The ignition device is threadedly connected to the battery housing via an O-ring.

[0020] Furthermore, the charge inside the ignition device is made of non-explosive agent.

[0021] Compared with the prior art, the present invention has the following technical effects:

[0022] The impact-type electric ignition device of the present invention adopts the design concept of non-explosion route, and the firing process is convenient while the product is pyrotechnic, which greatly improves the safety of transportation, storage and use. Through energy conversion, it promotes the development and application of new downhole ignition technology in oil and gas fields, can be used as a substitute for impact caps, broadens the research ideas of ignition technology, and is suitable for large-scale use and promotion in industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the impact type electric ignition device of the present invention;

[0024] Figure 2 It is a schematic diagram of the structure of the firing assembly in the present invention;

[0025] Figure 3 It is a schematic diagram of the battery housing structure in the present invention;

[0026] Figure 4It is a schematic diagram of the switch base structure in the present invention;

[0027] Figure 5 It is a structural schematic diagram of the rear portion of the ignition device in the present invention.

[0028] The meaning of the symbols in the figure is:

[0029] 1. Install the housing; 2. Firing assembly; 3. Switch assembly; 4. Ignition device;

[0030] 101, limit ring; 201, firing pin sleeve; 202, firing pin; 203, firing pin pin; 301, switch seat; 302, battery case; 303, negative electrode cap; 304, positive electrode cap; 401, pressure cap; 402, igniter. DETAILED DESCRIPTION

[0031] It should be noted that, unless otherwise specified, all components in the present invention are components known in the prior art. For example, the igniter is a known commonly used igniter.

[0032] Specific embodiments of the present invention are given below. It should be noted that the present invention is not limited to the following specific embodiments, and all equivalent changes made on the basis of the technical solution of this application fall within the protection scope of the present invention.

[0033] like Figure 1 As shown, an impact-type electric ignition device includes a mounting shell 1, inside of which a firing assembly 2, a switch assembly 3 and an ignition device 4 are sequentially connected.

[0034] The firing assembly 2 includes a firing pin sleeve 201 installed at the rear of the mounting housing 1; a firing pin 202 is installed inside the firing pin sleeve 201, and the rear of the firing pin 202 extends out of the rear end of the firing pin sleeve 201; the firing assembly 2 also includes a firing pin pin 203, which penetrates the side wall of the firing pin sleeve 201 and is connected to the firing pin 202;

[0035] The switch assembly 3 includes a switch seat 301 disposed in the middle of the mounting housing 1, a switch spacer is disposed at the rear of the switch seat 301, and the switch spacer contacts the front of the firing pin sleeve 201;

[0036] A battery housing 302 is provided in the front part of the switch seat 301, a negative electrode cap 303 is provided at one end of the battery housing 302 near the switch spacer, and a positive electrode cap 304 is provided at the other end of the battery housing 302; a battery is installed in the battery housing 302; when the firing pin 202 hits the switch spacer, the switch spacer can be deformed, thereby making the switch spacer and the negative electrode cap 303 conductive;

[0037] The rear part of the ignition device 4 is arranged in the front part of the mounting housing 1, and the front part of the ignition device 4 extends out of the front end of the mounting housing 1; the positive electrode cap 304 of the battery housing 302 is in contact with the ignition device 4;

[0038] The central axes of the firing pin 202, the battery housing 302 and the ignition device 4 are collinear.

[0039] A specific implementation of the present invention is given below. The device can be used for TCP casing patching and well repairing operations. When in use, the rear part of the mounting housing 1 of the impact-type electric ignition device of the present invention is sealed and connected to the oil pipe (the connection form of the two adopts a known and commonly used connection method, such as a threaded connection); the front part of the ignition device 4 is connected in series with the casing patching tool.

[0040] In the natural state, the firing pin 202 is fixed inside the firing pin cap 201 by the firing pin pin 203, and the circuit inside the switch assembly 3 is open. When igniting the well, the inner rod is transmitted to the oil pipe, and the rod hits the firing pin 202, so that the switch spacer of the switch assembly 3 is deformed. At this time, the negative cap 303 in the switch assembly 3 is turned on, forming a closed circuit. The battery in the battery housing 302 provides a power source for igniting the igniter, and the control circuit board collects the potential signal, which is boosted to the rated voltage required by the igniter through the shaping and amplification circuit (it should be noted that the circuit board here adopts a conventional circuit board known in the prior art, and the signal collection, shaping and boosting involved are all conventional technologies in the electrical field. Those skilled in the art are capable of selecting the corresponding circuit board according to actual needs), and the rapid discharge heats the resistance wire of the igniter 402, and the resistance wire heats up to ignite the agent, and the output flame ignites the gunpowder, and the gas volume expands to do work, completing the casing patching operation.

[0041] As a preferred solution, Figure 2 As shown, a pressure cap 401 is provided at the rear of the ignition device 4 ; an igniter 402 is provided inside the pressure cap 401 , and the positive electrode cap 304 of the battery housing 302 is in contact with the igniter 402 of the ignition device 4 .

[0042] Further preferably, an O-ring is provided between the pressure cap 401 and the igniter 402 .

[0043] Further preferably, an O-ring is provided between the ignition device 4 and the mounting housing 1 .

[0044] In the ignition device 4, the pressure cap 401 and the O-ring are used to seal and connect with the end face of the igniter 402. It is ensured that the energy at the output end of the igniter 402 is isolated from the switch assembly 3 to prevent the battery from exploding, thereby improving safety. Among them, the igniter 402 is a known and commonly used igniter, and the charge of the ignition device 4 uses a non-explosive agent, which further enhances safety. The probe of the igniter 402 itself serves as the positive electrode, and the shell of the ignition device 4 serves as the negative electrode to form a closed loop with the battery assembly. The battery supplies power, and after the agent is ignited, the resistance wire melts to form an open circuit.

[0045] As a preferred solution, the switch spacer is a copper switch spacer. This configuration makes the switch spacer have good conductivity and ductility, ensuring that after the firing pin 202 hits the switch spacer, the switch spacer is deformed but not broken, preventing the battery assembly from short-circuiting.

[0046] As a preferred solution, a limiting ring 101 is arranged inside the mounting housing 1 ; the specifications of the front portion of the battery housing 302 match the specifications of the inner ring of the limiting ring 101 .

[0047] The purpose of this arrangement is to prevent the battery housing 302 from failing due to vibration.

[0048] The ignition device 4 is threadedly connected to the battery housing 302 via an O-ring to enhance the sealing performance and further ensure safety in use.

Claims

1. An impact type electric ignition device, characterized in that: It comprises a mounting shell (1), wherein a firing assembly (2), a switch assembly (3) and an ignition device (4) are sequentially connected inside the mounting shell (1); The firing assembly (2) comprises a firing pin sleeve (201) installed at the rear of the mounting housing (1); a firing pin (202) is installed inside the firing pin sleeve (201), and the rear of the firing pin (202) extends out of the rear end of the firing pin sleeve (201); the firing assembly (2) also comprises a firing pin pin (203), and the firing pin pin (203) penetrates the side wall of the firing pin sleeve (201) and is connected to the firing pin (202); The switch assembly (3) comprises a switch seat (301) arranged in the middle of the mounting housing (1), a switch spacer is arranged at the rear of the switch seat (301), and the switch spacer is in contact with the front of the firing pin sleeve (201); A battery housing (302) is disposed at the front of the switch seat (301); a negative electrode cap (303) is disposed at one end of the battery housing (302) near the switch spacer, and a positive electrode cap (304) is disposed at the other end of the battery housing (302); batteries and circuit boards are sequentially installed in the battery housing (302) from the back to the front; When the striker (202) strikes the switch spacer, the switch spacer can be deformed, thereby causing the switch spacer to be electrically connected to the negative electrode cap (303); The rear portion of the ignition device (4) is arranged at the front portion of the mounting housing (1), and the front portion of the ignition device (4) extends out of the front end of the mounting housing (1); the positive electrode cap (304) of the battery housing (302) is in contact with the ignition device (4); The central axes of the firing pin (202), the battery housing (302) and the ignition device (4) are colinear.

2. The impact type electric ignition device according to claim 1, characterized in that: The rear part of the ignition device (4) is provided with a pressure cap (401); an igniter (402) is provided inside the pressure cap (401); and the positive electrode cap (304) of the battery housing (302) is in contact with the igniter (402) of the ignition device (4).

3. The impact type electric ignition device according to claim 2, characterized in that: An O-type sealing ring is arranged between the pressure cap (401) and the igniter (402).

4. The impact type electric ignition device according to claim 3, characterized in that: An O-type sealing ring is provided between the ignition device (4) and the mounting housing (1).

5. The impact type electric ignition device according to claim 1, characterized in that: The switch spacer is a copper switch spacer.

6. The impact type electric ignition device according to claim 1, characterized in that: A limit ring (101) is arranged inside the installation housing (1); the specifications of the front part of the battery housing (302) match the specifications of the inner ring of the limit ring (101); The ignition device (4) is threadedly connected to the battery housing (302) via an O-ring.

7. The impact type electric ignition device according to any one of claims 1 to 6, characterized in that: The charge inside the ignition device (4) is non-explosive.

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