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Closed detonator

A detonator, closed technology, applied in the direction of mining fluid, wellbore/well components, earthwork drilling and production, etc., can solve the problem of liquid can not flow

Active Publication Date: 2015-08-12
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention provides a closed detonator to solve the problem that the liquid inside and outside the oil pipe of the closed detonator cannot circulate

Method used

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  • Closed detonator

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Embodiment Construction

[0029] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the present invention will now be described with reference to the accompanying drawings.

[0030] Such as figure 1 As shown, the closed detonator (also referred to as recyclable closed detonator) of the embodiment of the present invention comprises:

[0031] The body 2 is cylindrical, such as cylindrical;

[0032] The hydraulic cylinder 4 is socketed in the body 2. The hydraulic cylinder is also called a hydraulic cylinder. The hydraulic cylinder includes: a moving end 41, a bottom plug 7, and an outer wall 45 arranged between the moving end and the bottom plug 7 and the inner side wall 43, and the inner cavity 40 arranged between the moving end, the bottom plug 7, the outer side wall and the inner side wall;

[0033] The moving end 41 is located at the top of the inner cavity 40 and can slide downward (towards the bottom plug 7) along the axial direction...

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Abstract

The invention provides a closed detonator which comprises a body, a hydraulic cylinder, a through hole, a spring, an inner tube, a detonator body and a detonating fuse, wherein the hydraulic cylinder is sheathed in the body; the through hole is formed in the side wall of the body and is used for communicating the outer side of the hydraulic cylinder with an inner cavity; the spring is supported against and presses the inner side wall of the hydraulic cylinder; the telescopic direction of the spring is the axial direction of the body; the inner tube is arranged in the body; the hydraulic cylinder is positioned between the inner tube and the body; the detonator body is arranged in the body and is positioned outside the inner tube; the detonating fuse is arranged in the body and is connected with the detonator body. After the closed detonator disclosed by the invention enters a perforated string for oil pipe transmission, a circulating channel for the inside and the outside of an oil pipe string can be established before and after the closed detonator detonates and is used for circulating well flushing or well killing operation, so that potential safety hazards are eliminated.

Description

technical field [0001] The invention relates to the field of oil and gas field development perforation, in particular to a closed detonator used in oil and gas well tubing transmission perforation technology. Background technique [0002] At present, in the field of perforating in oil and gas fields, the perforation operation can be performed on one or more layers of perforated well sections in one perforation perforation perforated by tubing transmission, and the well section perforated at one time can reach tens to hundreds of meters. The most important thing is that it can effectively prevent blowout. [0003] The initiators used in tubing transmission perforation are mainly open-type sand-proof impact initiators and closed-type impact initiators. Open-type sand-proof impact initiators are mainly used in oil and gas wells with clean wellbores and no sand production. The closed percussion detonator is mainly used in oil and gas wells with a lot of impurities in the wellbo...

Claims

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Application Information

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IPC IPC(8): E21B43/1185
CPCE21B43/11852
Inventor 韩宗正吴志勇张建军丁晓孟雪尹剑峰王域王晶晶于丽宏王德伟孙立军王培凇徐立清于立江孟月月叶峰严蕾佟姗姗姬菱秀美
Owner PETROCHINA CO LTD
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