Long-rubber-barrel differential pressure type water filling packer capable of washing well

Abstract

Provided is a long-rubber-barrel differential pressure type water filling packer capable of washing well. For overcoming the shortcomings of set sealing after well washing, non-tight sealing, blocked well washing, complicated structure and poor well washing mode caused deblocking of an existing long-rubber-barrel differential pressure type water filling packer during well washing. The long-rubber-barrel differential pressure type water filling packer comprises a seat seal assembly, a rubber barrel seal assembly, a well washing assembly and deblocking device, wherein an upper connector, an upper central pipe, a bridge type connecting sleeve, a lower central pipe and a lower connector are sequentially and fixedly connected from top to bottom to form a fixed tubular column, and the well washing assembly is installed on an upper central pipe between the upper connector and the axial direction of the bridge type connecting sleeve. The seat seal assembly is installed between the lower end of the bridge type connecting sleeve and the axial direction of the lower connector. The rubber barrel seal assembly is installed on an outer circle of the outer central pipe of the seat seal assembly. The long-rubber-barrel differential pressure type water filling packer has the advantages that the long-rubber-barrel differential pressure type water filling packer is reasonable in structural design, the seat sealing, well washing, sealing, deblocking functions are independently designed, opening and closing of a well washing valve can be controlled through well mouth operation, and the best effect of separated layer water injection is achieved.

Description

technical field [0001] The invention relates to a layered water injection packer in oil exploitation, in particular to a washable long rubber cylinder differential pressure water injection packer, which is suitable for medium and deep wells with small card distance, thick oil layers and thin interlayer oil pipes in one stage and two layers. Layer-by-layer water injection in small interlayers of injection wells, two-stage three-stage and above water injection wells. Background technique [0002] As oilfield development enters a period of high water cut, making full use of low-permeability layers to tap oilfield production potential and improving reservoir production and recovery has become the development goal of oilfields in the middle and late stages. Control high-permeability layers in oil layers and compulsively exploit low-permeability layers Layers, thick oil layers, and thin interlayers have become important means of tapping potential. With the mature application of o...

AI Technical Summary

Problems solved by technology

[0008] In order to overcome the deficiencies of the existing washable long rubber cartridge differential pressure packer when the packer is unsealed when the well is washed, the setting after the well is washed, the seal is not tight, the well is not cleared, the structure is complex, and the way of the well is not good. , the present invention provides a washable long rubber cylinder differential pressure water injection packer

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