High-temperature high-pressure hydraulic recoverable packer

Abstract

The invention relates to a high-temperature high-pressure hydraulic recoverable packer, and belongs to the field of oil and gas well borehole operation tools. The packer is composed of an upper joint, a lower joint, an outer center pipe, a cylinder sleeve, an upper guide ring and a lower guide ring. The upper joint is mounted at one end of an inner center pipe through a thread, and the lower joint is mounted at the other end of the inner center pipe through a thread. The outer center pipe and a release claw are mounted at the position, between the upper joint and the lower joint, of the inner center pipe, and an upper piston and a lower piston are mounted on the outer center pipe through the cylinder sleeve. The lower guide ring is nailed at the position, at one side of the cylinder sleeve, of the outer center pipe through a shear pin. The upper guide ring is mounted at the position, at one side of the lower guide ring, of the outer center pipe through a thread. The packer is compact in structure. A setting and unsetting structure is ingenious in design. The problem that an existing packer is unrecyclable, poor in compression resistance and poor in high temperature resistance is solved, and the high-temperature high-pressure hydraulic recoverable packer is especially suitable for operation of all kinds of well stimulation such as production, single-layer fracturing and separate-layer fracturing of deep wells and appraisal wells.

Description

technical field [0001] The invention relates to a high-temperature and high-pressure hydraulic recoverable packer, which belongs to the field of downhole operation tools for oil and gas wells. Background technique [0002] The packer is a special tool used to isolate oil, gas and water layers in downhole casing or open hole. It shortens the length and enlarges the diameter of the rubber tube through external force, seals the space of oil and collar, and separates the upper and lower oil (gas, water) layers of the packer, so as to realize the layered test, layered oil recovery, and layered transformation of oil and water wells and seal the water layer. It is widely used in drilling, cementing, testing, and well completion, and can be used for oil and gas well production, water injection (gas), interlayer isolation, separate injection and production, multi-layer testing, stimulation measures, etc. With the deepening of the production depth of oil wells, the formation tempera...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a high temperature and high pressure hydraulic recoverable packer with simple structure and convenient use to solve the problems of non-recoverable, poor pressure resistance and high temperature resistance existing in existing packers

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