Controllable multiple-pulse gas generator device

A gas generation and multi-pulse technology, which is used in the production of fluids, wellbore/well components, and earth-moving drilling, etc., can solve problems such as difficulty in closing, and achieve the effect of delaying the closing time and facilitating construction progress.

CN102080528AInactive Publication Date: 2011-06-01XIAN AEROSPACE CHEM PROPULTION PLANT
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2011-06-01
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a controllable multiple-pulse gas generator device, which is used for increasing the recovery ratio of crude oil. The device comprises an igniter, a central tube, an A-section propellant grain, a B-section propellant grain, a plugging tie-in and a centralizer, wherein the high burning rate ignition propellant and the high explosion ignition propellant are respectively placed in the A section of the central tube; the multiple-pulse in the construction process is controlled and realized, by disorderly arranging high, middle and low-burning rate propellant grains matched with the propellant grain of the central tube, in the A and B sections; the plugging tie-in is used for stopping the high-temperature high-pressure air flow, which is generated by burning the ignition propellant in the A section of the central tube, from leaking into the B-section propellant grain, and is used for ensuring that the A-section high-aluminum high-chlorine propellant grain is burnt firstly; and the centralizer is used for ensuring that the shell of propellant grain is not damaged by the friction between the casing tube wall and the shell in the device construction process. By using the device provided by the invention, the high energy generated by the propellant can be safely and efficiently released underground and the well is prevented from being damaged by the high energy. Meanwhile, a longer and difficultly-closed crack is formed, which is beneficial to the construction process.
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Description

technical field

[0001] The invention belongs to the technical field of gas generating devices, and relates to a novel controllable multi-pulse gas generating device for high-energy gas fracturing, which can be used for oilfield development and improve crude oil recovery. Background technique

[0002] As a measure for oilfield development and production stimulation, high-energy gas fracturing technology has the advantages of simple construction, low cost, and quick results. High-energy gas is usually generated after combustion of composite solid propellant or double-base drug. Since composite solid propellant has better temperature resistance and higher energy, it is the first choice for implementing this measure. When the geological conditions are suitable for this measure, a certain amount of composite solid propellant is ignited in the operating part of the oil well or water injection well, and the high-temperature and high-pressure gas produced will act to form multiple r...

Examples

Embodiment Construction

[0011] Such as figure 1 As shown, the device of the present invention is composed of an igniter 1, a section A high-alumina and high-chlorine propellant grain, a B-section high-alumina and high-chloride propellant grain, a plugging joint 3, and a centralizer 5. The high-alumina and high-chlorine propellant grains in sections A and B are each Φ84×3000mm, and the plugging joint 3 is used to ensure that the high-temperature and high-pressure airflow after the ignition propellant in the center tube 4 of section A will not leak into the center tube 4 of the grain column in section B. Ensure that the A-stage high-alumina and high-chlorine propellant grains burn first, and the B-stage high-burning-rate propellant grains burn later, so as to form more pressure pulses, that is, the number of pulses is controllable. The centralizer 5 is used to ensure that the shell of the drug column is not damaged by casing wall friction during the whole device going downhole. Φ86×50mm.

[0012] The ...