Device for building dynamic negative pressure by using interlayer gun

A negative pressure device and interlayer technology, applied in the field of oilfield machinery, can solve the problem that the interlayer gun is not used and so on

Pending Publication Date: 2021-04-30
大庆金祥寓科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the research and development of negative pressure perforation technology in the past, interlayer guns with negative pressure conditions have not been used

Method used

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  • Device for building dynamic negative pressure by using interlayer gun
  • Device for building dynamic negative pressure by using interlayer gun

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] The technical scheme of the present invention will be further described below in conjunction with accompanying drawing, but should not be construed as limiting the present invention:

[0015] A dynamic negative pressure device constructed by using an interlayer gun, comprising an interlayer gun 1 . A negative pressure cabin door device 2 is added to one or both ends of the interlayer gun 1. The negative pressure cabin door device 2 includes a main body 3 and a slidable negative pressure piston 4. There are four holes on the side wall of the main body 3. There are four liquid inlet holes, and the negative pressure piston 4 is located in the main body 3 and blocks the four liquid inlet holes. When the negative pressure piston 4 is pushed into the negative pressure gun body under the pressure of the well fluid, the liquid inlet channel is opened, and the well fluid flows into the inner cavity of the negative pressure gun through the liquid inlet channel, causing the loss o...

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Abstract

The invention relates to a device for building dynamic negative pressure by using an interlayer gun. The device comprises the interlayer gun; a negative pressure cabin door device is additionally arranged at one end or two ends of the interlayer gun; the negative pressure cabin door device comprises a main body and a slidable negative pressure piston; four liquid inlet holes are formed in the side wall of the main body; and hole channels are also formed in the positions, corresponding to the liquid inlet holes, of the negative pressure piston. According to the device for building the dynamic negative pressure by using the interlayer gun, by designing the negative pressure gun cabin door device of the interlayer gun, the function of a negative pressure cabin of the interlayer gun is increased, the most direct and effective effect is achieved through the position advantage that the interlayer gun is closest to a perforation layer section, and the acting effect of the negative pressure on perforation channels are improved.

Description

technical field [0001] The invention belongs to the field of oil field machinery and relates to a dynamic negative pressure device constructed by using an interlayer gun. Background technique [0002] The dynamic negative pressure perforation technology is a new method of cleaning the perforation channel at the moment of perforation. In the technical development of oil and gas well completion, the reason why the dynamic negative pressure perforation technology can greatly reduce the perforation pollution and damage is mainly because the negative pressure difference is quickly formed in the wellbore after perforation, that is, in the For a period of time, a dynamic negative pressure zone will be created in the perforation interval, and a pressure difference will be generated inside and outside the hole wall in the perforation tunnel (the pressure in the geological rock layer is greater than the pressure in the tunnel cavity), and under the action of the pressure difference, i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/117E21B43/119
CPCE21B43/117E21B43/119
Inventor 禹栽星张国杰蔡山王树申陈德祥
Owner 大庆金祥寓科技有限公司
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