CN-122015126-A - Three-stage ignition gas production type oil-gas well tool acting igniter

Abstract

A work-acting igniter for a three-stage ignition gas-producing type oil-gas well tool relates to an igniter for an oil-gas well, wherein a resistor (2) and an initial ignition source consisting of ignition powder (3) are packaged in an igniter shell (4). The contact electrode penetrating through the center of the shell and the shell electrode are respectively connected with two poles of the resistor (2), and when the cable applies detonating current to the contact electrode and the shell, the resistor (2) heats and burns to ignite the peripheral ignition powder (3) to complete the primary ignition function. After the main powder column (12) is pushed into the outer shell (9), a primary igniter, a pressure cap (1), a secondary powder column (5), a clamp spring (6) and an O-shaped sealing ring (7) are arranged on the inner shell (8) to be used as an ignition device, the igniter can be reliably ignited under high well temperature and high hydraulic pressure environment through graded ignition, the combustion process can be controlled in a stable and controllable range, stable high-pressure gas is generated to push a piston, and tool acting actions can be safely and reliably completed.

Inventors

• WANG ZHE
• LI NAN
• SUN GUANG
• LIU HANYANG
• LI JUNXIAN
• LI GUANZHONG
• CHEN JI
• LIU DI
• JIANG YUEJIAN

Assignees

• 辽宁华丰民用化工发展有限公司

Dates

Publication Date

20260512

Application Date

20260109

Claims (5)

1. 1. A three-stage ignition gas-producing type oil-gas well tool acting action igniter is characterized in that the igniter is a three-stage ignition gas-producing type oil-gas well acting igniter, the igniter produces high-pressure gas to drive a tool piston to move, safety pressure relief is achieved after working is achieved, an initial ignition source composed of a resistor (2) and an ignition powder (3) is packaged in an igniter shell (4), two poles of the resistor (2) are respectively connected with a shell electrode through a contact electrode penetrating through the center of the shell, an ignition process is that when an initiation current is applied to the contact electrode and the shell through a cable, the resistor (2) heats and burns to ignite peripheral ignition powder (3) to achieve primary ignition, the upper end of the primary igniter is buckled in an inner shell (8) through a pressure cap (1) through threaded connection, a cylindrical secondary ignition powder (5) is mounted at the lower end of the inner shell (8), a clamp spring (6) is mounted in a built-in rectangular groove of the inner shell (8), an outer sleeve O-shaped sealing ring (7) of the inner shell (8) is mounted in an outer shell (9), a quick ignition powder (10) is poured in a three-stage main ignition powder (12), when the ignition powder (9) penetrates through the outer shell (11) and is mounted at the outer side of the primary ignition powder (11), and then the quick ignition powder column (10) ignites slow combustion powder at the lower end, the three-stage main ignition powder column (12) stably burns and produces gas, the gas pushes the lower-stage piston device to complete the design action, and the pressure relief body (11) is opened for safety pressure relief before the disassembly after the action is finished.
2. 2. The three-stage ignition gas production type oil and gas well tool acting igniter of claim 1, wherein the primary igniter comprises a resistor (2) and an ignition charge (3).
3. 3. The work-doing igniter of a three-stage ignition gas-producing type oil and gas well tool according to claim 1, wherein the combustion speed of the secondary transfer powder grain (5) and the quick ignition powder grain (10) is higher than the combustion speed of the three-stage main powder grain (12).
4. 4. The work-doing igniter of a three-stage ignition gas-producing type oil and gas well tool according to claim 1, wherein said three-stage main-combustion cartridge (12) is composed of a gas generating agent with high gas quantity, low combustion speed and low combustion temperature, and generates clean and stable high-pressure gas during combustion. The upper end of the three-stage main igniting grain (11) is added with a single-grain or multi-grain quick igniting grain, the whole is a pouring molding process, constant-surface combustion is realized by the effective combustion area, the pressure stability of the produced gas is ensured, and the length of the effective burning grain ensures that the pressure of the produced gas meets the actuation requirement.
5. 5. The working action igniter for the three-stage ignition gas production type oil and gas well tool is characterized by comprising a press cap (1), a resistor (2), ignition powder (3), an igniter shell (4), a secondary powder charge (5), a clamp spring (6), an O-shaped sealing ring (7), an inner shell (8), an outer shell (9), a quick ignition powder charge (10), a pressure release body (11) and a three-stage main powder charge (12).

Description

Three-stage ignition gas production type oil-gas well tool acting igniter Technical Field The invention relates to an oil and gas well igniter, in particular to a three-stage ignition gas production type oil and gas well tool acting igniter. Background Setting of an oil-gas well underground operation bridge plug, casing repairing and the like are key process links in underground operation, and reliability of the bridge plug is directly related to operation success or failure. These downhole tools typically require a built-in power source to drive the piston, creating significant setting forces to complete the release. The traditional power source is mainly driven by gunpowder, and has the following defects: 1. The reliability problem is that in deep wells, ultra-deep wells or high-temperature wells, the environment is bad, and the single ignition structure and main charge can have failure conditions such as flameout, incomplete combustion and the like due to insufficient pressure, temperature or ignition energy. 2. The safety problem is that if the main charge is directly ignited, the combustion speed is too high, detonation or severe pressure impact can be generated, damage to precise components (such as a lock ring and slips) in the tool is caused, and even early failure of the tool is caused. 3. The energy output stability is poor, the output pressure curve of the traditional design is steep, the stability is insufficient, the stable and uniform motion of the piston is not facilitated, and the setting or releasing effect is affected. Thus, there is a strong need for an actuation igniter that is more reliable in the combustion sequence, more stable in energy release, and more adaptable. Disclosure of Invention The invention aims to provide a three-stage ignition gas-producing type oil-gas well tool acting igniter, which can be reliably ignited under high well temperature and high hydraulic pressure environment by stage ignition, can control the combustion process within a stable and controllable range, can generate stable high-pressure gas to push a piston, and can safely and reliably complete tool acting action. The invention aims at realizing the following technical scheme: The igniter comprises a bridge plug setting tool or a sleeve repairing tool, is integrated with a three-stage oil and gas well actuating igniter, generates high-pressure gas for driving a piston of the tool to move, and can safely release pressure after the work is finished; When a cable applies detonating current to the contact electrode and the outer shell, the resistor heats and burns to ignite peripheral ignition powder to complete primary ignition, the upper end of the primary igniter is buckled in the inner shell by a pressing cap through threaded connection, the lower end of the inner shell is provided with a cylindrical secondary powder column, a clamp spring is arranged in a built-in rectangular groove of the inner shell, and the inner shell is sleeved with an O-shaped sealing ring and then is arranged in the outer shell; when the primary igniter is used as an initial source to ignite the secondary ignition powder, the secondary flame rapidly penetrates and ignites the fast ignition powder at the upper end of the tertiary main ignition powder, then the fast ignition powder ignites the slow ignition powder at the lower end, the tertiary main ignition powder stably combusts to produce gas, the gas pushes the lower-stage piston device to complete the design action, and the pressure relief body is opened before the disassembly is completed after the action is finished, so that the pressure relief is safe. The three-stage ignition gas-producing type oil-gas well tool acting igniter comprises a resistor and ignition powder. The secondary ignition powder column and the quick ignition powder column have higher combustion speed than the tertiary main ignition powder column. The three-stage ignition gas-producing type oil-gas well tool acting igniter is characterized in that the three-stage main combustion grain consists of a gas generating agent with high gas quantity, low combustion speed and low combustion temperature, and clean and stable high-pressure gas is produced during combustion. The upper end of the three-stage main combustion grain is added with a single-grain or multi-grain quick-combustion igniting grain, the whole is a pouring molding process, constant-surface combustion is realized by the effective combustion area, the pressure stability of the produced gas is ensured, and the length of the effective combustion grain ensures that the pressure of the produced gas meets the operation requirement. The igniter comprises a pressure cap, a resistor, ignition powder, an igniter shell, a secondary powder column, a clamp spring, an O-shaped sealing ring, an inner shell, an outer shell, a quick ignition powder column, a pressure relief body and a tertiary main powder column. The invention has the advantages and effects that: 1.