Packer

Abstract

The invention discloses a Y221 packer with an anchoring function. The Y221 packer comprises a central pipe, wherein the central pipe is sequentially provided with an upper joint, a backwashing mechanism, a rubber sleeve mechanism, an anchoring mechanism, a centralizing mechanism and a lower joint from top to bottom; the backwashing mechanism comprises an outer sleeve, a backwashing piston sleeve and a backwashing spring, wherein the outer sleeve fixedly sleeves the exterior of the upper joint, a backwashing space is formed between the outer sleeve and the upper joint, and the backwashing piston sleeve is arranged in the backwashing space and divides the backwashing space into a first space and a second space in a sealing manner; the upper joint is provided with a first through hole communicating with the first space, and the outer sleeve is provided with a second through hole communicating with the second space; a containing ring groove for containing a blocking ring is further formedin the position, below the first through hole, of the wall of the upper joint; and the backwashing piston sleeve is provided with a blocking position for blocking communication between an inner runnerand the second space as well as an opening position for communicating the inner runner with the second space.

Description

technical field [0001] The invention relates to a packer, in particular to a Y221 packer, which belongs to the field of downhole tools for oilfield exploitation. Background technique [0002] In the late stage of oilfield development, the pressure of the bottom layer must be continuously supplemented by water injection. Conventional water injection methods include general water injection and layered water injection. However, in the general water injection process, backwashing is required. The water injection packers currently in use have problems such as the backwash mechanism often not opening, and the opening pressure of the backwash mechanism is difficult to control. Contents of the invention [0003] In view of the above disadvantages, an object of the present invention is to provide a Y221 packer with an anchoring function, so as to ensure the opening stability of the backwash mechanism and ensure the backwash effect. [0004] To achieve the above object, the presen...

AI Technical Summary

Problems solved by technology

In the general water injection process, wells need to be backwashed. Currently, the water injection packers currently in use have the problem that the backwash mechanism cannot be opened often, and the opening pressure of the backwash mechanism is difficult to control.

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