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Claw-sleeve anti-setting packer

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

Active Publication Date: 2013-12-25
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 sleeve type anti-setting packer, which overcomes the deficiencies of the prior art above, and can effectively solve the problems of poor reliability and easy pre-sealing of existing packers

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 for well cementing and completion operation of oil and gas fields and provides a claw-sleeve anti-setting packer. The claw-sleeve anti-setting packer comprises a center tube, an upper baffle sleeve, rubber barrel packing devices, a locating claw sleeve, rubber barrel cut nails and a hydraulic driving device, wherein the upper baffle sleeve is fixedly mounted at the outer side of the upper part of the center tube; the locating claw sleeve is fixedly arranged at the outer side of the middle part of the center tube through the rubber barrel cut nails; more than two open grooves are distributed at the lower circumference of the sidewall of the locating claw sleeve. According to the claw-sleeve anti-setting packer, the structure is reasonable and compact, and the use is convenient; boss locating blocks are arranged on the locating claw sleeve, and an outer tube is arranged outside a pressurized tube, so that the limiting protection on the locating claw sleeve and the pressurized tube can be realized, the adaptability and reliability to various well conditions are improved, and the beforehand setting is avoided; long and short rubber barrels of different hardness are added for matched use, and supporting rings and supporting ring seal rings are added into the long rubber barrels, so that the packing capability can be improved, and the problem of layer crossing is avoided.

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 Applications(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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