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Packer

A packer and partition technology, which is applied in sealing/isolation, wellbore/well parts, earthwork drilling and production, etc., can solve the problem of insufficient pressure bearing capacity of the well flushing packer, and improve the displacement of the well flushing , prolong the use time, reduce the effect of pump pressure

Pending Publication Date: 2022-08-02
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to provide a packer to solve the problem of insufficient pressure bearing capacity of the flushing packer in the prior art

Method used

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Embodiment Construction

[0020] It should be noted that the embodiments in the present application and the features of the embodiments may be combined with each other in the case of no conflict. The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0021] As described in the background art, the common well-flushable packer for water injection is Y341, and the opening pressure of the back-flushing well channel is 3-5MPa. For wells with an interlayer pressure difference greater than 6MPa, the well-flushable packer It cannot withstand such a high positive pressure difference. During the stoppage of injection, the liquid in the upper high pressure layer will channel to the lower low pressure layer through the backwash channel of the packer, which will affect the water injection. At present, there are two ways to adjust the well flushing channel of the Y341 packer. One is to increase the opening pressure of the well fl...

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Abstract

The invention provides a packer which comprises a packing part and a well washing assembly connected with the packing part, the well washing assembly comprises a well washing sleeve assembly and a concentric adjusting cylinder, the well washing sleeve assembly is connected with the packing part, a liquid inlet hole is formed in the well washing sleeve assembly, and the well washing assembly is controlled by an electric control mechanical arm; the concentric adjusting cylinder is movably arranged in the well washing sleeve assembly in the axial direction of the well washing sleeve assembly, the concentric adjusting cylinder is provided with a sealing position for shielding the liquid inlet hole and a liquid inlet position for avoiding the liquid inlet hole, and the outer wall of the concentric adjusting cylinder is in threaded fit with the well washing sleeve assembly so that the concentric adjusting cylinder can be screwed in and screwed out of the well washing sleeve assembly; according to the packer, on one hand, the problem of high-pressure differential separate injection is solved, on the other hand, the pump pressure for well washing is reduced, the well washing displacement is improved, separate injection of a well with large interlayer pressure difference (within 15 MPa) can be met, meanwhile, a spring structure of a common high-pressure-difference well washing packer is omitted, and the service time of the packer is prolonged.

Description

technical field [0001] The invention relates to the technical field of well flushing and packing equipment, in particular to a packer. Background technique [0002] The common well-flushable packer for water injection is Y341, and the opening pressure of the back-flushing well channel is 3-5MPa. For wells with a pressure difference between layers greater than 6MPa, the well-flushable packer cannot withstand such a high positive pressure. Poor, during the stoppage of injection, the liquid in the upper high pressure layer will channel to the lower low pressure layer through the backwash channel of the packer, affecting the water injection. [0003] At present, there are two ways to adjust the well flushing channel of the Y341 packer. One is to increase the opening pressure of the well flushing valve by increasing the return spring in the well flushing valve of the packer. This method can generally increase the well flushing pressure to About 6MPa; another way is to change the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/12E21B21/10
CPCE21B33/12E21B21/10Y02E10/10
Inventor 陈新志谢建勇刘进军鲁霖懋唐晓川王小江王吉忠
Owner PETROCHINA CO LTD
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