Horizontal well high-pressure resistant packer for reservoir transformation

Abstract

The invention relates to a horizontal well high-pressure resistant packer for reservoir transformation, which is applied to reservoir transformation of petroleum extraction. 3 to 8 sections of self-expansion rubber cylinders are mould-pressed and vulcanized on the outer wall of a pipe body; an annular middle baffle ring is fixed between the two adjacent sections of self-expansion rubber cylinders through a fastening bolt; one limited ring is fixed on each outer end part of each self-expansion rubber cylinder at the two ends through the fastening bolt; each self-expansion rubber cylinder consists of a self-expansion rubber cylinder body, self-expansion rubber cylinder back pressure rings and metal rings; the self-expansion rubber cylinder back pressure rings are arranged at the two ends of the self-expansion rubber cylinder body; and the metal rings are vulcanized on the surfaces of the outer walls of the self-expansion rubber cylinder back pressure rings. The horizontal well high-pressure resistant packer for the reservoir transformation can work reliably under high-pressure difference environments through the effective support of the self-expansion rubber cylinders; the length of each self-expansion rubber cylinder is reduced so that tools can enter successfully; the drift diameter is larger, the yield is higher after an oil and gas well is put into production, and the well is repaired conveniently; and the reliability is high and risks in the operation process are reduced.

Description

technical field [0001] The invention relates to a downhole tool for oil exploitation, in particular to a downhole packer, which is a packer with a self-expanding rubber cylinder in contact with water and oil for a horizontal well used for reservoir reconstruction. Background technique [0002] With the rapid development of the national economy, the demand for primary energy such as oil and natural gas continues to increase. The focus of global oil and gas resource development has gradually shifted to low-permeability and difficult-to-produce unconventional oil and gas reservoirs, including tight sandstone oil and gas reservoirs, shale oil and gas reservoirs, and coalbed methane. Unconventional resources that were previously considered to have no economic value for extraction have now been commercially exploited on a large scale to meet the growing energy demand and obtain considerable economic benefits, such as shale gas extraction in North America. This is mainly due to th...

AI Technical Summary

Problems solved by technology

Overcoming the complex structure of traditional packers, the risk of setting failure in on-site construction, and the high requirements on the diameter of the well in the open hole environment, the position with a large well diameter cannot be set, and the inner diameter is small, which is not conducive to the subsequent downhole measures. insufficient

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