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Block type anti-sit packer

An anti-setting and packer technology, applied in sealing/isolation, wellbore/well components, earthwork drilling and production, etc., can solve the problems of easy early setting and poor reliability of packers, and avoid layer channeling , Improve the sealing ability, improve the adaptability and reliability

Active Publication Date: 2016-01-13
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a block-type anti-setting packer, which overcomes the above-mentioned deficiencies in the prior art, and can effectively solve the problem of the reliability of existing packers. Poor performance and easy to seal in advance

Method used

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  • Block type anti-sit packer

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Embodiment Construction

[0020] The present invention is not limited by the following examples, and specific implementation methods can be determined according to the technical solutions of the present invention and actual conditions.

[0021] In the present invention, for the convenience of description, the description of the relative positional relationship of each component is based on the figure 1 For example, the positional relationship of front, back, up, down, left, right, etc. is based on the attached figure 1 determined by the layout direction.

[0022] Below in conjunction with embodiment and accompanying drawing, the present invention will be further described:

[0023] as attached figure 1 , 2 , 3, and 4, the block-type anti-setting packer includes a central barrel 1, an upper retaining sleeve 2, a rubber sleeve sealing device, a positioning sleeve 3, a positioning block 4, a rubber sleeve shear nail 5 and a hydraulic drive device , the outer side of the upper part of the ...

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Abstract

The invention relates to the technical field of packers used in well cementing and completion operations in oil and gas fields. Tube shear nails and hydraulic drive device, the upper outer side of the center tube is fixed with an upper stop sleeve; the middle outer side of the center tube is fixed with a positioning sleeve through rubber tube shear nails; the outer side of the center tube between the upper stop sleeve and the positioning sleeve is set with A rubber cartridge isolation device capable of radially expanding to isolate a wellbore after being pressurized. The invention has a reasonable and compact structure and is easy to use. By setting a positioning block on the positioning sleeve and an outer cylinder outside the pressure-suppressing cylinder, the position-limiting protection of the positioning sleeve and the pressure-suppressing cylinder can be realized, and its protection against various wells can be improved. To improve the adaptability and reliability of the environment, avoid its early seat seal, add long and short rubber tubes with different hardness for use together, and add support rings and support ring sealing rings in the long rubber tubes, which can improve its sealing ability and avoid channeling. layer problem.

Description

technical field [0001] The invention relates to the technical field of packers used in well cementing and completion operations in oil and gas fields, and relates to a block-type anti-setting packer. Background technique [0002] In the construction process of oilfield well completion, workover, and production stimulation, it is often necessary to use packers to set and seal formations on the well wall to achieve the purposes of layered and segmented production, water control and water shutoff, and reservoir stimulation. Conventional packers often have the following problems: 1. The complex structure and many parts lead to high processing costs and low overall reliability, especially poor adaptability to irregular well walls, which can easily lead to early seating when there is an abnormality in the well 2. Insufficient sealing capacity, when water injection pressurizes the oil layer, it is easy to cause layer channeling, thereby reducing the benefit of water injection. The...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B33/127
Inventor 陈若铭冉照辉赵继斌李晓军王飞跃
Owner BC P INC CHINA NAT PETROLEUM CORP
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