Claw sleeve anti-setting 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 containment ability, improve the adaptability and reliability

Active Publication Date: 2016-04-06
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 claw-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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  • Claw sleeve anti-setting 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 description attached to the description. 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 claw-type anti-setting packer includes a central barrel 1, an upper stopper 2, a rubber cartridge packing device, positioning claws 3, rubber cartridge shears 5 and a hydraulic drive device, and the central barrel The upper out...

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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, and is a claw sleeve type anti-sealing packer, which includes a central cylinder, an upper retaining sleeve, a rubber sleeve sealing device, positioning claw sleeves, and rubber sleeve shears. Nails and hydraulic drive devices, the upper outer side of the center cylinder is fixedly installed with the upper retaining sleeve; the middle outer side of the central cylinder is fixed with positioning claw sleeves by rubber tube shear nails; the lower circumference of the positioning claw sleeve side wall is distributed with no less than two open slot. The present invention has a reasonable and compact structure and is easy to use. By arranging a boss positioning block on the positioning claw sleeve and an outer cylinder outside the pressure-suppressing cylinder, the position-limiting protection of the positioning claw sleeve and the pressure-suppressing cylinder can be realized, and its Adaptability and reliability to various well conditions, to avoid its early seat seal, add long and short rubber tubes with different hardness for use together, and add support ring and support ring sealing ring in the long rubber tube to improve its sealing Ability to avoid channeling problems.

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 claw sleeve 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B33/127
Inventor 宋朝晖章敬赵继斌王飞跃刘灵
Owner BC P INC CHINA NAT PETROLEUM CORP
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