Impact type electric ignition device

Abstract

The utility model discloses an impact type electric ignition device, which adopts the design concept of a non-explosion route, is convenient in firing process and industrial in product fire removal, and greatly improves the safety of transportation, storage and use. 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 utility model belongs to the technical field of oil and gas well casing repair and well repair, and particularly relates to an impact-type electric ignition device. Background Art

[0002] During oil and gas well casing repair and remediation operations, the ignition device is a critical component for ensuring successful, first-time ignition of the patch and must meet the requirements for safe and reliable ignition. Traditionally, ignition is achieved by striking the percussion cap with a firing pin. However, the percussion cap is a pyrotechnic workpiece and a civilian explosive. This leads to cumbersome procedures, inconvenience in storage and transportation, and a lack of safety assurance, which has hindered the promotion and use of the product.

[0003] Currently, the search for new, non-explosive alternatives to pyrotechnics is an inevitable trend. In the oil and gas well industry, impact-type electric ignition devices are a relatively new ignition technology, yet they remain largely undeveloped, with no technical documentation or application results to draw upon. Therefore, a new, non-explosive ignition device is urgently needed to address these existing technical issues. Utility Model Content

[0004] The purpose of the utility model is to provide an impact-type electric ignition device to solve the problems of ignition devices in the prior art, such as complicated procedures, inconvenient storage and transportation, and poor safety.

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

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

[0007] The firing assembly includes a firing pin sleeve mounted at the rear portion of the mounting housing; a firing pin is mounted inside the firing pin sleeve, and the rear portion 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 passes through the side wall of the firing pin sleeve and is connected to the firing pin;

[0008] The switch assembly includes a switch seat disposed in the middle of the mounting housing, a switch spacer disposed 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 the battery housing in sequence from back to front;

[0010] When the firing pin strikes the switch spacer, the switch spacer is deformed, thereby causing the switch spacer to be electrically connected to the negative electrode cap;

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

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

[0013] The utility model also has the following features:

[0014] Furthermore, a pressure cap is provided at the rear of the ignition device; an igniter is provided 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 provided inside the mounting housing; the specifications of the front portion of the battery housing 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] This new impact-type electric ignition device utilizes a non-explosive design concept, facilitating a convenient firing process while eliminating pyrotechnics, significantly improving transportation, storage, and operational safety. Through energy conversion, it promotes the development and application of new downhole ignition technologies in oil and gas fields. It can serve as a replacement for impact percussion caps, broadening research opportunities in ignition technology and making it suitable for large-scale industrial use and promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the overall structure of the impact-type electric ignition device of the present utility model;

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

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

[0026] Figure 4This is a schematic diagram of the switch seat structure in the utility model;

[0027] Figure 5 It is a structural schematic diagram of the rear part of the ignition device in the utility model.

[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. Limiting ring; 201. Firing pin sleeve; 202. Firing pin; 203. Firing pin pin; 301. Switch seat; 302. Battery housing; 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 and commonly used igniter.

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

[0033] like Figure 1 As shown, a percussion-type electric ignition device includes a mounting shell 1 , in 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 mounted at the rear of the mounting housing 1; a firing pin 202 is mounted inside the firing pin sleeve 201, and the rear end 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 extends through 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 disposed in the front portion of the switch housing 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. A battery is installed in the battery housing 302. When the firing pin 202 strikes the switch spacer, it deforms the switch spacer, thereby establishing electrical connection between the switch spacer and the negative electrode cap 303.

[0037] The rear portion of the ignition device 4 is disposed within the front portion of the mounting housing 1, and the front portion of the ignition device 4 extends beyond the front end of the mounting housing 1; the positive electrode cap 304 of the battery housing 302 contacts 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] The following is a specific embodiment of the present invention. The device can be used for TCP casing patching and well repair 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 between 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 to the casing patching tool string.

[0040] In its natural state, the firing pin 202 is fixed inside the firing pin cap 201 by the firing pin pin 203. At this time, the circuit inside the switch assembly 3 is open. When igniting during downhole construction, an internal rod is transmitted to the oil pipe, and the rod strikes the firing pin 202, causing the switch spacer of the switch assembly 3 to deform. At this time, the negative cap 303 inside the switch assembly 3 is turned on, forming a closed circuit. The battery in the battery housing 302 provides the power source for igniting the igniter. The control circuit board collects the potential signal, and after the voltage is boosted by the shaping and amplification circuit, it is boosted to the rated voltage required by the igniter (it should be noted that the circuit board here adopts a conventional circuit board known in the prior art. The signal acquisition, shaping and voltage boosting involved are conventional technologies in the electrical field. Those skilled in the art are capable of selecting the corresponding circuit board according to actual needs). Rapid discharge heats the resistance wire of the igniter 402. The resistance wire heats up and ignites the agent. The output flame ignites the pyrotechnic powder, 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 contacts 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] Ignition device 4 is sealed with a pressure cap 401 and an O-ring at the end face of igniter 402. This ensures that the energy at the output of igniter 402 is isolated from switch assembly 3, preventing battery explosion and improving safety. Igniter 402 is a commonly used igniter, and the charge of ignition device 4 uses a non-explosive agent, further enhancing safety. The probe of igniter 402 serves as the positive electrode, while the housing of ignition device 4 serves as the negative electrode, forming a closed circuit with the battery assembly. When the battery supplies power and the agent ignites, the resistor fuses, creating a short circuit.

[0045] As a preferred solution, the switch spacer is made of copper. 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 deforms but does not break, preventing the battery assembly from short-circuiting.

[0046] As a preferred solution, a limit ring 101 is provided 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 limit ring 101 .

[0047] The purpose of this arrangement is to protect the battery housing 302 from failure of the batteries inside the battery housing 302 due to vibration.

[0048] The ignition device 4 is threadedly connected to the battery housing 302 via an O-ring, which enhances the sealing and further ensures safety in use.

Claims

1. A percussion 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) 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), and the firing pin pin (203) passes through the side wall of the firing pin sleeve (201) and is connected to the firing pin (202); 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 is in contact with the front of the firing pin sleeve (201); A battery housing (302) is provided at the front 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); batteries and circuit boards are installed in sequence from back to front in the battery housing (302); When the striker (202) strikes the switch spacer, the switch spacer is 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 in 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 collinear.

2. The impact-type electric ignition device according to claim 1, characterized in that: The rear portion 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 provided 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 made of copper.

6. The impact-type electric ignition device according to claim 1, characterized in that: A limiting ring (101) is provided inside the installation 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); The ignition device (4) is threadedly connected to the battery housing (302) via an O-ring.

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