Internal compression hydraulic control packer

Abstract

The invention discloses an internal compression liquid-controlled packer, which comprises an upper joint, an outer cylinder, and a lower joint sequentially connected from top to bottom. A rubber cylinder is arranged inside the outer cylinder, and a piston is connected to the bottom of the rubber cylinder. The nail is temporarily fixed to the lower joint, and the upper end of the rubber cylinder is connected to the upper joint through an adjustment ring. The adjustment ring, rubber sleeve, and piston form an inner cylinder structure, and an annular space is formed between the outer cylinder and the inner cylinder structure. Both the upper joint and the lower joint are provided with axial pressure transmission holes leading to the above-mentioned annular space. A supporting body is set between the rubber cylinder and the outer cylinder, and the upper end of the supporting body is connected with the upper joint. The upper end of the rubber tube and the lower end of the adjustment ring are connected by a stepped end face, and the lower end of the rubber tube and the upper end of the piston are also connected by a stepped end face. The invention solves the problems of unreliable diversion of internal and external pipes, unsmooth backwash well and cumbersome seal inspection in the prior art.

Description

technical field [0001] The invention relates to a downhole packer, in particular to an internal compression hydraulic control type packer. Background technique [0002] At present, the water injection technology used in offshore water injection wells is the hollow layered water injection technology, and the integrated technology of concentric measurement and adjustment is used to conduct online measurement and adjustment of water injection wells. Due to constraints such as well deviation limitation, high bottomhole pressure, and high temperature, the success rate of surveying and adjustment is greatly affected, and the urgent demand for refined water injection in the sea is restricted. [0003] The concentric double-pipe water injection can realize the effective layered water injection of the large pressure difference oil layer and the ground deployment. It has the characteristics of simple measurement and adjustment and accurate distribution. At the same time, it does not n...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an internal compression hydraulic control packer, which solves the problems of unreliable flow separation between the inner and outer pipes, unsmooth backwash well, and cumbersome seal inspection in the prior art

Images