Self-examination packer

A packer and self-inspection technology, applied in sealing/isolation, wellbore/well components, earthwork drilling and production, etc., can solve the problems of uncertain setting success and low cost

Active Publication Date: 2015-01-21
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a self-testing packer, which solves the problem of uncertain whether the packer is successfully set after setting, and the sealing method is easy to operate, high in efficiency, low in cost and ideal in effect

Method used

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Embodiment Construction

[0023] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described with reference to the accompanying drawings.

[0024] Such as figure 1 As shown, the present invention provides a self-testing packer 100, which can be used as a screen hanger in the mechanical sand control process, and can also be used to block bottom water in the under-sealing and up-production process of layered mining. The main parts of the inner layer of the self-sealing packer 100 include an upper center pipe 1 and a lower center pipe 2, and a connected lumen is formed in the upper and lower center pipes; the outer wall of the upper end of the upper center pipe 1 is screwed to an upper joint 3 with a hollow structure , the upper joint can be connected with the oil pipe, and the sealing ring 7 is used to seal between the upper joint 3 and the upper central pipe 1 . The ...

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Abstract

The invention provides a self-examination packer. The self-examination packer can serve as a sieve tube hanger, and can also be used for blocking bottom water in a layered bottom-sealing and top-extraction process. An examination through hole is formed in a side wall of an upper center tube of the self-examination packer; an examination piston which is used for sealing the examination through hole is arranged in the upper center tube through an examination shear pin; examination spacer rings are arranged between adjacent rubber barrels; a plurality of radial fluid through holes are formed in the periphery of each examination spacer ring; and the side wall of a core tube of each rubber barrel is provided with a second through hole which can be connected with the corresponding radial fluid through hole after the rubber barrel is compressed. After setting is finished, the examination shear pin is shorn off through liquid pressure, and pressure liquid enters a gap between the two adjacent rubber sleeves through a liquid channel so as to judge whether setting is complete or not. Moreover, the self-examination packer also comprises a midway-dropping-preventing mechanism and an elastic unsealing mechanism; the midway-dropping-preventing mechanism comprises an upper joint and a limiting pawl spring; and the elastic unsealing mechanism comprises a lower center tube and an unsealing nut.

Description

technical field [0001] The invention relates to an oil well isolation device, in particular to a self-inspection sealing packer. Background technique [0002] In the process of oilfield development, mechanical sand control is required for unconsolidated sandstone reservoirs with serious sand production. In this process, Y455 packer can be used as a screen hanger. The main purpose is to hang sand control screens and seal sand control The annular space of the screen and casing prevents the formation fluid from carrying formation sand from the annular space of the sand control screen and casing into the wellbore, resulting in sand production. Existing screen hangers do not have self-sealing function, and cannot be found in time after setting failure, resulting in poor sand control effect in the later stage. In the process of sealing the bottom and top mining in layered mining, the Y445 packer can also be used to seal the layer, but the existing Y445 packer cannot be inspected ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/122
CPCE21B33/122
Inventor 田野赵旭亮陈鹏高春阳陈辽望胡燕张建陈悦孔凡楠孔祥一徐晶由春坤吕孝明孙洪岩夏云棚
Owner PETROCHINA CO LTD
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