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Packer

A packer and rubber cylinder technology, applied in sealing/packing, wellbore/well components, earth-moving drilling, etc., can solve the problem that the packer cannot be used for bidirectional pressure bearing, etc., and achieve a large expansion ratio and reliable sealing , the effect of improving reliability

Inactive Publication Date: 2016-07-13
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to provide a packer to solve the problem that the packers in the prior art cannot be well applied to irregular open-hole wellbores and bear pressure in both directions

Method used

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Embodiment Construction

[0020] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways defined and covered by the claims.

[0021] The present invention provides a packer, such as figure 1 with 2 As shown, the packer includes: a central pipe 10, including a central cavity; a first rubber cylinder 21 and a second rubber cylinder 22, fixed on the outer wall of the central pipe 10 at intervals along the axial direction; the first rubber cylinder pushes The part 51 is sleeved on the central tube 10 and abuts against the first rubber tube 21; the second rubber tube pushing part 52 is sleeved on the central tube 10 and is in contact with the second rubber tube 22; the sleeve 40 is sleeved Located on the outside of the central tube 10 and between the first rubber cartridge 21 and the second rubber cartridge 22 , there is a sealed driving cavity between the first rubber cartrid...

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Abstract

The invention provides a packer. The packer comprises a central pipe, a first packer element, a second packer element, a first packer element pushing part, a second packer element pushing part and a sleeve, wherein the first packer element and the second packer element are axially fixed on the outer wall of the central pipe at an interval; the first packer element pushing part is mounted on the central pipe in a sleeving manner and is in butted connection with the first packer element; the second packer element pushing part is mounted on the central pipe in a sleeving manner and is in butted connection with the second packer element; the sleeve is mounted on the outer side of the central pipe in a sleeving manner and located between the first packer element and the second packer element, and a sealed driving cavity is formed among the first packer element pushing part, the second packer element pushing part and the sleeve; an overflowing hole for communicating a central inner cavity and the driving cavity is formed in the central pipe. When the packer is in operation, the first packer element and the second packer element expand simultaneously under the action of hydraulic pressure of the driving cavity, two seal points are formed between the packer and the inner wall of a to-be-sealed pipe, the expansion ratio of the packer elements is high, and the packer elements are not prone to loosening; the packer has the bidirectional pressure-bearing capacity, can be better suitable for the irregular open hole wall and has a sealing effect more reliably.

Description

technical field [0001] The invention relates to the field of petroleum exploration and mining, and more specifically relates to a packer. Background technique [0002] At present, open-hole packers and sliding sleeve staged fracturing technologies for horizontal wells are widely used in oil and gas development in various oil fields, and packers, especially open-hole packers, are key tools for this process. Packers are mainly divided into two types based on different working principles, namely compression packers and expansion packers, and because the two packers have different sealing methods, different working principles, and different applicable conditions, their respective All have limitations. Among them, when the compression packer is set in an irregular open-hole wellbore, there will be a problem that the rubber sleeve cannot completely fit the wellbore, resulting in poor sealing. However, the expansion packer has the problems of poor pressure bearing capacity and in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/126
Inventor 袁新生田志华杨新克陈禹欣董小卫南荣丽
Owner PETROCHINA CO LTD
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