Bidirectional compression hydraulic setting anchorage-free packer and application method thereof

A hydraulic setting and packer technology, which is applied in sealing/isolation, earthwork drilling, wellbore/well parts, etc., can solve the problem of insufficient pressure bearing capacity of the packer and achieve small unsealing force, The effect of improving the sealing ability

Active Publication Date: 2016-11-16
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the above technical problems, a two-way compression hydraulic setting anchorless packer was invented. This invention further improves the sealing ability of the packer and solves the problem of insufficient upward pressure bearing capacity of the packer.

Method used

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  • Bidirectional compression hydraulic setting anchorage-free packer and application method thereof
  • Bidirectional compression hydraulic setting anchorage-free packer and application method thereof
  • Bidirectional compression hydraulic setting anchorage-free packer and application method thereof

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Embodiment Construction

[0017] In the present invention, except the unblocking block 19, the upper setting shear nail 2 and the lower setting shear nail 16, other parts are all cylindrical structures.

[0018] See figure 1 As shown, the two-way compression hydraulic setting anchorless packer, the upper joint 1 and the inner center pipe 8 are threadedly connected, the outer center pipe 11 is sleeved outside the inner center pipe 8, and the inner center pipe 8 is provided with an inner center pipe and an outer The step 23, correspondingly, the outer central tube 11 is provided with an inner step 22 of the outer central tube, and the inner step 22 of the outer central tube is hung on the outer step 23 of the inner central tube.

[0019] The upper end ring 10 , the rubber tube 12 and the lower end ring 14 are sleeved outside the outer center pipe 11 in sequence, and the lower end ring 14 and the outer center 11 are fixed by the lower setting shear nails 16 .

[0020] An upper locking thread 91 is provid...

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Abstract

The invention relates to a bidirectional compression hydraulic setting anchorage-free packer and an application method thereof and belongs to the technical field of downhole packers used in oil exploitation. An outer central tube of the bidirectional compression hydraulic setting anchorage-free packer sleeves an inner central tube; a rubber sleeve sleeves the outer central tube; a lower setting mechanism, a releasing mechanism and a lower setting mechanism are arranged below the rubber sleeve and outside the outer central tube; inner steps of the outer central tube are hung on outer steps of the inner central tube; an upper locking mechanism is arranged above the rubber sleeve and outside the outer central tube; a balancing hydraulic cylinder and an upper setting mechanism are sequentially arranged above the outer central tube and outside the inner central tube; and balancing liquid inlet holes are arranged at positions below the rubber sleeve, and on a lower end ring and the outer central tube. The setting mechanisms and the locking mechanisms are respectively arranged on the upper part and the lower part of the rubber sleeve, so that the sealing ability of the rubber sleeve is greatly improved; and as the multistage balancing hydraulic cylinder is arranged, and no releasing shear pin is arranged on the packer disclosed by the invention, a releasing force is small.

Description

technical field [0001] The invention relates to the technical field of downhole packers used in oil exploitation, in particular to a two-way compression hydraulic setting anchorless packer and a usage method thereof. Background technique [0002] In the field of oil production, downhole packers are key tools for layered oil production. According to the classification method of packers, packers with four characteristics: The packer is called Y341 type packer. The unsealing of this kind of packer is generally realized by pulling up the pipe string and breaking the unsealing shear pin of the packer. This brings about a problem. When the rubber cylinder bears the upper pressure difference, the upper pressure difference has a downward thrust on the rubber cylinder. When the thrust of the differential pair of rubber cartridges is greater than the sum of the shear force of the unsealing shear nails and the friction force between the rubber cartridge and the well wall, the packer ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/126E21B33/128
CPCE21B33/126E21B33/1285
Inventor 王世杰刘建新张瑞霞张峰伊西锋张全胜魏伟张化强高恒超杨慧朱瑛辉
Owner CHINA PETROLEUM & CHEM CORP
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