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Expandable packer and setting method thereof

An expansion packer technology, which is applied in sealing/isolation, earthwork drilling, wellbore/well parts, etc., can solve the problems of packer failure and economic loss, and reduce packer failure , reduce excessive deformation and avoid economic loss

Active Publication Date: 2016-03-16
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the packer is prone to unsealing and cause economic losses in the process of hydraulic fracturing, the embodiment of the present invention provides an expanding packer and its setting method

Method used

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  • Expandable packer and setting method thereof
  • Expandable packer and setting method thereof
  • Expandable packer and setting method thereof

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Embodiment Construction

[0049] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0050] figure 1 Shown is a schematic structural diagram of a hydraulic fracturing system, which includes: an expandable packer 00, a choke sand blaster 01, a fracturing string 02, and a casing 03, wherein the expandable packer The upper joint of the spacer 00 is connected to the lower end of the fracturing string 02, the lower joint is connected to the throttling sand blaster 01, and the expansion packer 00, the throttling sand blaster 01 and the fracturing string 02 are placed in the casing 03 Internally, the casing 03 is cemented in the well. During hydraulic fracturing, the fracturing string 02 is extended to a place 10-20m above the oil and gas reservoir to be reformed underground, and a fracturing pump truck is used to pump liqu...

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Abstract

The invention discloses an expandable packer and a setting method thereof, and belongs to the technical field of oil exploration. The expandable packer comprises an upper joint, an upper balance hydraulic cylinder, an expandable rubber sleeve, a lower balance hydraulic cylinder and a lower joint which are sequentially connected with the outer portion of a center pipe in a sleeving manner from top to bottom. The upper joint, the expandable rubber sleeve and the lower joint are fixedly connected with the center pipe. The upper joint is fixedly connected with the upper balance hydraulic cylinder. The upper balance hydraulic cylinder and the lower balance hydraulic cylinder are movably connected with the center pipe. The upper balance hydraulic cylinder comprises an upper cylinder jacket and an upper rubber sleeve set, and the upper cylinder jacket is fixedly connected with the upper joint. The lower balance hydraulic cylinder comprises a lower rubber sleeve set and a lower cylinder jacket. Liquid inlet holes are formed in the faces, in sleeved connection with the upper balance hydraulic cylinder, the expandable rubber sleeve and the lower balance hydraulic cylinder, of the center pipe respectively, and penetrate the pipe wall of the center pipe. The problems that in the hydraulic fracturing process, setting of a packer is likely to fail, and economic losses are caused can be solved, and the effect of avoiding economic losses is achieved. The setting method is used for setting of the packer.

Description

technical field [0001] The invention relates to the technical field of oil exploitation, in particular to an expandable packer and a setting method thereof. Background technique [0002] In the process of oil exploitation, the use of hydraulic fracturing technology to reform oil and gas reservoirs refers to creating artificial fractures on the oil and gas reservoirs to be reformed, continuously injecting liquid into the artificial fractures, and generating pressure through hydraulic force to make the artificial fractures larger. Then carry high-strength solid particles through the liquid, and fill the solid particles into the artificial fractures. After the construction is completed, the liquid is reversed, and the solid particles remain in the fractures. Artificial fractures with a preset area are formed on the modified oil and gas reservoir. , producing oil and gas channels with high flow capacity, and expanding the seepage area of ​​oil and gas reservoirs. [0003] In th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/127
Inventor 马昌庆余东合
Owner PETROCHINA CO LTD
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