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A well pressure control layered isolation water injection string

A kind of pipe string and packer technology

Active Publication Date: 2018-12-28
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the hydraulic control packer is the main type of packer used. Since the existing hydraulic control packer is controlled by the ground through the hydraulic control pipeline to set and unseal, it cannot be unsealed and is easily affected by scaling. , high cost of hydraulic control pipelines, waste of manpower and material resources, resulting in short service life of the pipe string, poor reliability and other problems
[0003] After searching, no prior art with the same structure as the present application was found in the technical field

Method used

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  • A well pressure control layered isolation water injection string
  • A well pressure control layered isolation water injection string
  • A well pressure control layered isolation water injection string

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Embodiment Construction

[0025] The detailed description and technical content of the present invention are described below in conjunction with the accompanying drawings. However, the accompanying drawings are only for reference and description, and are not intended to limit the present invention.

[0026] according to figure 1 , a well pressure control layered isolation water injection pipe string, including a pipe string body 102, the pipe string body is placed in the casing 101, and a pressure transmission control hydraulic seal is arranged between the outer wall of the pipe string body and the inner wall of the casing Packer 104, the pipe string body is equipped with pressure transmission downhole hydraulic control packer unpacking control device 103 connected with pressure transmission control hydraulic packer, pressure transmission downhole hydraulic control packer setting control device 103 device 106 .

[0027] The pressure transmission downhole hydraulic control packer unpacking control devi...

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Abstract

The invention discloses a well pressure control separate-layer packing water injection string which comprises a string body. The string body is arranged in a casing, pressure transmission control hydraulic-control packers are arranged between the outer wall of the string body and the inner wall of the casing, and a pressure transmission downhole hydraulic-control packer unsetting control device and a pressure transmission downhole hydraulic-control packer setting control device which are connected with the pressure transmission control hydraulic-control packers are mounted on the string body. The pressure transmission downhole hydraulic-control packer unsetting control device is positioned above the pressure transmission control hydraulic-control packer on the uppermost layer. The pressure transmission downhole hydraulic-control packer setting control device is positioned below the pressure transmission control hydraulic-control packer on the lowermost layer. The well pressure control separate-layer packing water injection string has the advantage that pressure difference of fluid in the oil pipe casing in the well pressure control separate-layer packing water injection string can be adjusted under the condition that internal pressures of hydraulic-control pipelines do not need to be controlled by the ground, and accordingly the hydraulic-control packers can be quickly set and unset under the control.

Description

technical field [0001] The invention relates to an oilfield layered exploitation technology, in particular to a well pressure control layered isolation water injection pipe string. Background technique [0002] As oilfields enter the stage of high water-cut production, the requirements for layered water injection are increasing, and the sealing performance required by different pipe string types also tends to be diversified. Among them, the hydraulic control packer is the main type of packer. Since the existing hydraulic control packer is controlled by the ground through the hydraulic control pipeline to control its setting and unsealing, it cannot be unsealed and is easily affected by scaling. , the high cost of the hydraulic control pipeline, waste of manpower and material resources, resulting in short life of the pipe string and poor reliability. [0003] After searching, no prior art with the same structure as the present application was found in the technical field. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/20E21B33/127
CPCE21B33/127E21B43/20
Inventor 徐戍王昕车传睿张国玉顾国利李德忠田俊聂文龙魏新晨曲晓峰任从坤李伊珂
Owner CHINA PETROLEUM & CHEM CORP
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