Downhole decoupling clutch rotary steering drilling method and reverse motor clutch

Abstract

The invention relates to a downhole decoupling clutch rotary steering drilling method and a reverse motor clutch. The reverse motor clutch is connected with a ground driving control part of a drilling device through an upper drill column and connected with a drill bit of the drilling device. The reverse motor clutch comprises a reverse motor, a lower drill column and a forward motor. The rotating direction of the upper drill column and the rotating direction of the forward motor are consistent with the output rotating direction of the ground driving control part. The rotating direction of the reverse motor is opposite. Rotation of the lower drill column is controlled by the rotating speed of the upper drill column and the rotating speed of the reverse motor in a superposition mode. According to the downhole decoupling clutch rotary steering drilling method and the reverse motor clutch, the reverse motor provides opposite rotating directions, static friction of contact between the drill columns and the low side of a borehole is changed into dynamic friction or rolling friction, in the abovementioned way, the friction resistance of the downhole drill columns can be greatly released, the transmitting capacity of drilling pressure is improved, and the problems that in the prior art, due to the fact that the friction resistance is too large, a horizontal well cannot continue to drill, extension of the horizontal section of the horizontal well is affected, and the utilization efficiency of unconventional oil and gas resources is reduced are solved.

Description

technical field [0001] The invention relates to the technical field of intelligent steerable drilling, in particular to an downhole decoupling clutch rotary steerable drilling method and a reverse motor clutch. Background technique [0002] At present, my country's shale oil and gas development mainly draws on the North American "well factory" model. Specifically, the "well factory" adopts a factory-like drilling model. With full consideration of geographical conditions and reducing the difficulty of drilling construction, it concentrates on one well site to realize the drilling and follow-up operations of horizontal well groups. At present, the difficulties in industrialized horizontal well drilling lie in anti-collision between wells, high build-up rate drilling, three-dimensional horizontal well trajectory control, wellbore stability, and excessive friction in horizontal well sections, among which excessive friction is the most prominent One of the puzzles. The phenomen...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the technical problems existing in the prior art, the present invention provides an downhole decoupling rotary steerable drilling method and a reverse motor clutch, which solves the problem that the horizontal well cannot continue to drill due to excessive friction in the prior art and affects the level of the horizontal well. The extension of the section reduces the utilization efficiency of unconventional oil and gas resources, etc.

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