Compression packer

A compression packer, No. 1 technology, applied in the field of downhole tools in oilfields, to achieve the effects of convenient unpacking, enhanced fracturing resistance, and enhanced sealing performance

Active Publication Date: 2020-11-20
大庆华油石油科技开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a compression packer, which has the advantages of strong resistance to fracturing, easy unsealing and strong sealing performance, and solves the problems mentioned in the above-mentioned background technology

Method used

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Embodiment Construction

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0025] see Figure 1-6 , a compression packer, including a center pipe 1, the top of the center pipe 1 is movably socketed with an upper joint 2, and a first extrusion cylinder 3 is installed below the upper joint 2, and the first extrusion cylinder 3 is movably socketed On the top of the central tube 1, a protective body 4 is installed on the first extruding cylinder 3, and the central tube 1 is fixedly sleeved with a No. 1 rubber tube 5, a metal block 7, a N...

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Abstract

The invention relates to the technical field of oil field downhole tools, and discloses a compression packer. The compression packer comprises a central pipe. An upper joint is movably connected withthe top of the central pipe in a sleeving mode, a first extrusion cylinder is installed below the upper joint and movably connected to the top of the central pipe in a sleeving mode, and a protectionbody is installed on the first extrusion cylinder. A first rubber cylinder, a metal block, a second rubber cylinder and a third rubber cylinder are fixedly connected to the central pipe in a sleevingmode from top to bottom. According to the compression packer, by means of the designed rubber cylinders with air channels, the radial extrusion force can be provided by the compression of the air channels for the rubber cylinders when the rubber cylinders bear the axial extrusion force, and the sealing speed can be increased; the air channels still provide the radial extrusion force for the rubbercylinders after release operation is accomplished, and the sealing performance of the rubber cylinders to an annular space can be enhanced; and the shape similar to a spring is formed by the air channels and the rubber cylinders, the rubber cylinders can provide the axial resilience force when the packer conducts sealing removal, and sealing removal of the packer can be more convenient.

Description

technical field [0001] The invention relates to the technical field of oilfield downhole tools, in particular to a compression packer. Background technique [0002] The packer is a kind of elastic sealing element, which is used to isolate the annular space between the pipe strings of various sizes and the wellbore and between the pipe strings, and isolate the production layer to control the production (injection) fluid and protect the casing. Generally, the downhole tools are divided into compression type, expansion type and so on. [0003] Among them, the compression packer mainly uses the rubber sleeve to expand and deform due to axial extrusion, and to generate contact pressure with the inner wall of the oil sleeve, thereby completing the sealing of the annular space of the oil sleeve. However, the rubber sleeve is subject to pressure in the high-pressure downhole environment. The pressure difference between the upper and lower sealing spaces is prone to excessive deform...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/129E21B33/128
CPCE21B33/128E21B33/129
Inventor 常江吴杰
Owner 大庆华油石油科技开发有限公司
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