A kind of packer for water injection well and using method thereof

Abstract

The invention discloses a packer for water injection wells and a use method thereof, relates to the technical field of packers, and comprises a pipe body and a fixed frame, a traction mechanism is installed on the upper side of the fixed frame, and the output end of the traction mechanism is installed There is a connecting rope connected with the pipe body, the pipe body includes a first assembly pipe and a second assembly pipe, a connecting column is fixedly connected between the first assembly pipe and the second assembly pipe, and the first assembly pipe and the second assembly pipe An expansion sleeve is installed on the outside of the second assembly pipe close to the connecting column, and several expansion support frames are installed inside the expansion sleeve. In the present invention, two sets of expansion members are arranged in the expansion sleeve of the pipe body, and one group drives two sets of push rings to move through hydraulic pressure, thereby squeezing the expansion sleeve, and then squeezing the expansion support frame inside the expansion sleeve Deformation, after the expansion support frame is deformed, the expansion sleeve can be unfolded, and the expansion sleeve can be further inflated through the inflation tube, so that the pipe body and the water injection well can be more closely fitted.

Description

technical field [0001] The invention relates to the technical field of packers, in particular to a packer for water injection wells and a usage method thereof. Background technique [0002] Water injection wells are wells used to inject water into oil formations. In the process of oil field development, water is injected into the oil reservoir through a special water injection well to maintain or restore the pressure of the oil layer to increase the production speed and recovery rate of the oil reservoir. In general, the water injection well only needs to be equipped with a set of casing strings and A packer was installed, and the packer was lowered to 50m from the top boundary of the perforation section for isolation. [0003] After searching, the Chinese patent discloses a packer (publication number: CN105804689A). The flap in this patent seals the annular space between the body and the inner surface of the wellbore by turning over, so even the rubber tube It needs to be...

AI Technical Summary

Problems solved by technology

[0004] In the prior art, the expansion degree of the packer is relatively low, resulting in the change of the diameter of the packer according to the size of the water injection well, and the expansion method of the expansion sleeve in the existing packer is relatively simple. At the same time, the existing packer It is inconvenient to take it out from the inside of the injection well when recycling

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