Hydraulically boosted pulling and running tool for capillary pipe of large-inclination water injection well

Abstract

The invention discloses a hydraulically boosted pulling and running tool for a capillary pipe of a large-inclination water injection well. The hydraulically boosted pulling and running tool comprises a salvaging body, a hydraulic boosting mechanism, a hydraulic power-increasing mechanism and a salvaging claw mechanism installed at the lower end of the salvaging body. The hydraulic boosting mechanism in the hydraulically boosted pulling and running tool is mainly designed for solving the problem that a pulling and running instrument is difficult to go down at an inclined well section, downward power is provided for the instrument at the inclined well section by utilizing throttling pressure difference produced by overflowing of the gap between a packing cup and an oil pipe to prevent the instrument from being impeded in the midway and ensure that the instrument goes down to a predetermined position. The hydraulic power-increasing mechanism in the hydraulically boosted pulling and running tool is mainly designed for avoiding the phenomenon that a water distributor core is easily stuck with a working barrel during salvaging at the inclined well section and comprises a slip power-increasing mechanism and a two-stage piston power-increasing mechanism, and it is ensured that the core is smoothly taken out of the working barrel by increasing an anchoring force and an upward power of the pulling and running instrument at the inclined well section. The problem that the pulling and running instrument is difficult to go down and is small in salvaging powder during upgoing at the inclined well section is solved in a hydraulic mode.

Description

technical field [0001] The invention relates to a salvage device for layered water injection development of high-inclination water injection wells in oil fields, in particular to a capillary hydraulic booster for high-inclination water injection wells. Background technique [0002] At present, the layered water injection technology of highly deviated wells (well deviation greater than 45°) in the oil field is mainly based on eccentric and hollow injection, and the layered test and deployment are mainly implemented by steel wire fishing. Affected by the well inclination, it is difficult for the steel wire and the measuring and adjusting instrument to go down. At the same time, when the water distribution core is lifted up, the working cylinder of the water distribution device is easy to get stuck, and the success rate of fishing is low. The success rate of hollow fishing is between 45°-60°. There are only 57% of them, and the well deviation exceeds 60°, and the steel wire thr...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a capillary hydraulic power-increasing fishing device for high-inclination water injection wells, which solves the problem that the measuring and adjusting instrument is difficult to go down in the inclined well section and the fishing force is small when going up through the hydraulic method

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