RFID-based downhole torque clutch-type well-drilling resistance-reduction device

Abstract

The invention discloses an RFID-based downhole torque clutch-type well-drilling resistance-reduction device. The device comprises a nonmagnetic electrical equipment short circuit which is divided intoan inner layer and an outer layer. The outer layer comprises, from top to bottom, a hydraulic joint, a middle joint, a hydraulic cylinder body, a clutch cavity and a dual joint; and the outer parts are each of a rotation body structure, the inner parts are each provided with a cavity, and a longitudinal penetrating hole is formed in the axis of the inside of the dual joint. The inner layer comprises, from top to bottom, a motor pump short circuit, an electromagnetic valve short circuit, a piston shaft, an outer gear fixing seat, an inner gear, an outer gear and a ball seat; a longitudinal penetrating hole is formed in the axis of each of the motor pump short circuit, the electromagnetic valve short circuit, the piston shaft, the outer gear fixing seat, the inner gear and the outer gear ofthe inner layer; the inner gear and the outer gear are of an engaging structure; the upper part of the inner gear is connected with the lower part of the piston shaft; the upper part of the piston shaft is provided with a cavity; and the cavity provides a vertical movement space for the piston shaft for driving the inner gear and the outer gear to be engaged with or separated from each other. Theengagement and separation of the inner gear and the outer gear are realized through the arrangement that ground control signals are transmitted via radio frequency small balls.

Description

technical field [0001] The invention belongs to the field of oil and gas drilling tools, and in particular relates to an RFID-based downhole torque clutch type drilling drag reduction device, which is mainly used in the drilling of oil and gas horizontal wells and directional wells. Background technique [0002] At present, in the process of drilling directional wells and horizontal wells, the conventional method is still to use screw drilling tools and LWD / MWD tools to realize wellbore trajectory control and directional operations. The advantages of this operation method are low cost and simple operation. The problem lies in the horizontal In the process of directional drilling in this section, there are issues of underpinning pressure and tool face instability. The technology and products related to the rotary steerable drilling system are mainly monopolized by foreign companies such as Baker Hughes and Halliburton, so their service costs are expensive. Except for offshore...

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Problems solved by technology

[0004] In view of the above-mentioned problems and the defects of the prior art, the present invention provides a torque clutch drilling drag reduction device based on RFID radio frequency identification, which transmits ground control signals through radio frequency balls, and adopts an integral gear pair structure to overcome the easy occurrence of split jaw clutches. The defect of eccentric wear solves the problems of large axial friction in the horizontal section of the drill string during conventional sliding drilling of directional wells and horizontal wells, the occurrence of under pressure, and the difficulty in tool face stability, and at the same time overcomes the inability to guarantee random and effective meshing of the mechanical clutch structure defects, improving the reliability and stability of the clutch system

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