An anchored water injection process string and its use method

Abstract

The invention discloses an anchoring type water injection process pipe column and a use method thereof. The anchoring type water injection process pipe column comprises a casing pipe, wherein an oil pipe is arranged in the casing pipe, the oil pipe is connected with following components which are respectively a plurality of packers, a plurality of water distributors, an anchoring device and a force enhancement device, the packers are arranged on the oil pipe at intervals, and divide the oil pipe into multiple water injection layer segments, each packer is arranged on a portion, correspondingto each water injection layer segment, of the oil pipe, the anchoring device is arranged between one of the packers and one of the water distributors, which are adjacent, and the force enhancement device is arranged on another portion, at the lower end of the anchoring device, of the oil pipe. The power enhancement device is arranged on the anchoring type water injection process pipe column, and therefore when the casing pipe is lifted, the anchoring type water injection process pipe column can overcome frictional resistance between each packer and the casing pipe, overcome pipe lifting load increased by the anchoring device, increase pipe lifting power, achieve the effect of completing pipe lifting by using current repair equipment, and effectively reduce operation cost and shorten a welloccupation period.

Description

technical field [0001] The invention belongs to the field of oilfield water injection devices, and in particular relates to an anchored water injection process string and a method for using the same. Background technique [0002] At present, in multi-stage subdivision water injection wells, there are many stages of packers used in the pipe string. For the expansion packer, each stage of the packer has frictional resistance with the casing when the pipe is pulled; for the compression packer , each level of packer has an unsealing force, so when pulling up the pipe, it is necessary to overcome the sum of friction or unsealing forces of the packers at all levels, and the problem of lifting and jamming is likely to occur when minor repair operations are used. [0003] In high-pressure deep wells, anchored layered water injection strings are generally used in oil fields at present to achieve downhole anchoring and anti-creeping of the string and improve the sealing reliability of...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide an anchored water injection process string and its use method to solve the problem that the packer in the multi-stage subdivision water injection well has frictional resistance with the casing, and in the high pressure deep well The technical problem of pipe jamming caused by the fouling of anchor tools and the increase of pipe load is to increase the power of pipe tripping, and the pipe tripping can be completed by using minor repair equipment, reducing the operating cost and the technical effect of well occupation period

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