High-pressure water injection packer

Abstract

A high-pressure water injection packer mainly comprises a sealing mechanism, a setting mechanism, a locking mechanism, an unblocking mechanism, a reverse well-flushing mechanism and the like. The sealing mechanism mainly comprises an outer central tube, a long rubber cylinder, a spacer ring, a short rubber cylinder and the like. The setting mechanism mainly comprises an upper central tube, a lower central tube, a setting shear pin, a piston, a lower cylinder liner, a lower reverse flushing jacket, a spring holder, a spring, a reverse flushing valve seat, an outer central tube, a pressure ring and the like. The locking mechanism mainly comprises a lock ring, a support ring, a lock loop and the like. The unblocking mechanism mainly comprises an upper joint, an upper central tube, a lower central tube, a lower joint, an unblocking shear pin and the like. The reverse well-flushing mechanism mainly comprises an upper reverse flushing jacket, a central tube, an outer central tube, a lower reverse flushing jacket, a reverse flushing valve seat, a reverse flushing piston and the like. The high-pressure water injection packer has the advantages that the defects of poor setting reliability, small packing area and low construction integration rate are overcome, the packer is especially satisfactory to high-pressure separated layer water injection, and the high-pressure water injection packer is high in packing success rate, long in effective lifetime and the like.

Description

technical field [0001] The invention relates to a sealing packer, especially mainly used for high-pressure separate injection in oilfields, and can also be used for high-pressure water injection for process measures such as layered oil testing, oil production, water search, water plugging, fracturing, acidification, and sand control. Packer. Background technique [0002] With the continuous development of oilfields, during the production and water injection of oil and water wells, due to the continuous adjustment of development plans and the influence of factors such as oil, gas, water migration, in-situ stress, corrosion, geological structure and construction measures, raw cement in production wells In order to adjust the water absorption profile, increase the water injection effect, reduce the water content of the oil well and improve the recovery rate, packers are usually used to inject water into subdivided layers, so as to realize the injection of water in different lay...

AI Technical Summary

Problems solved by technology

The seal is directly embedded in the lower end of the backwash valve seat, which not only solves the above-mentioned shortcomings of unreliable setting, small sealing area, and low construction success rate, but also mainly consists of sealing, setting, locking, unsealing and backwashing. It is composed of wells and other mechanisms, especially suitable for the needs of high-pressure layered water injection, so it has the advantages of good sealing performance, high success rate of isolation, and long effective service life.

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