Universal torque transmission device capable of electrically connecting for down hole

Abstract

The invention belongs to the technical field of precise electric connection, and particularly relates to a universal torque transmission device capable of electrically connecting for a down hole. Theuniversal torque transmission device capable of electrically connecting for the down hole uses torque transmission between two non-concentric rotating structures, non-concentric movement of the two non-concentric rotating structures are subjected to universal torque transmission to convert into concentric movement by a universal flexible shaft, and a wire guide hole is formed in the device to realize electric and signal transmission of the two non-concentric rotating structures. According to the universal torque transmission device, a large-torque universal torque transmission function can berealized under the condition of the limited radial space size, and electric and signal linking and electric and signal transmission through a hard wire are realized at the same time; the whole torquetransmission device is simple and reliable in structure and can be adjusted structurally according to using occasions, and usability is high; and a coaxial connector and a contact-type slip ring are adopted at the two ends of the torque transmission device respectively to carry out electric and signal connection, dismounting and mounting are convenient, the whole device is modular, and changing and maintaining are simple and reliable.

Description

technical field [0001] The invention belongs to the technical field of precise electrical connection, and in particular relates to a universal torque transmission device which can be electrically connected in a well. Background technique [0002] The universal torque transmission device is widely used in downhole drilling tools, such as screw drilling tools, rotary steering tools, etc., mainly to achieve universal and transmit torque. Taking screw drilling tools as an example, the stator performs planetary motion in the rotor cavity, and through the universal torque transmission device, the planetary motion can be converted into coaxial motion, thereby providing drilling power for the drill bit. [0003] Existing solutions: petal-type universal torque transmission structure and spherical hinge universal torque transmission structure, while petal-type universal torque transmission structure and spherical hinge universal torque transmission structure have low lifespan, complex...

AI Technical Summary

Problems solved by technology

[0003] Existing solutions: petal type universal torsion transmission structure and ball joint torsion transmission structure, and petal type universal torsion transmission structure and ball joint torsion transmission structure have low service life, complex structure, and the most important It is impossible to realize the power and signal connection

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