Ultra-short accessible type hydraulic packer

Abstract

The invention relates to an ultra-short accessible type hydraulic packer, and belongs to the field of underground operation tools of oil-gas wells. The packer comprises a central tube, an upper jointand a lower joint, wherein the middle part of the central tube between the upper joint and the lower joint is equipped with a rubber barrel and a lower cone through a conductive ring; an upper movablering and a lower movable ring are mounted on the central tube at one side of the upper joint through connecting rings; an upper piston sleeves the central tube between the rubber barrel and the lowerjoint through a cylinder sleeve; and a punching hole is formed in the central tube between the upper piston and the lower joint. The central tube of the packer is an integrated type central tube, sothat reliability and integrity strength, in a production process, of the packer are strengthened. The ultra-short accessible type hydraulic packer solves the problem that an existing packer only can bear single-way load as processing, assembly, test, use and transportation are very inconvenient due to a complex structure. The packer is greatly simplified in integral structure, reduces the cost, and is especially suitable for drilling, well-fixing and yield-increasing operation uses of the oil-gas well.

Description

technical field [0001] The invention relates to an ultra-short removable hydraulic 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. Through the action of external force, the length of the rubber tube is shortened and the diameter is increased to seal the annular space of the oil and sleeve, and separate the oil (gas, water) layers above and below the packer, so as to realize the layered testing of oil and water wells, layered oil recovery, and separation. Layer water injection, layer transformation and sealing water layer. It is widely used in drilling, cementing, testing, and well completion, and can be used for production, water injection (gas), interlayer isolation, separate injection and production, multi-layer testing, stimulation operations, etc., and the packer can be used separately. Type and perm...

AI Technical Summary

Problems solved by technology

Due to the complex structure of the same type of removable hydraulic packers currently on the market, and the total length of the packer is too long (about two meters), it is very inconvenient to process, assemble, test, use and transport, and the process of unsealing The operation is complicated, and related unsealing tools are required to achieve unsealing. The operation is difficult and can only bear one-way load

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