Wireless two-way transmission device for signals between main shaft and movable sleeve in underground rotary steering drilling tool

Abstract

The invention discloses a wireless two-way transmission device for signals between a main shaft and a movable sleeve in an underground rotary steering drilling tool and belongs to the field of petroleum and natural gas well drilling. The device comprises non-contact rotary transformers, a data transmitter and a data receiver, wherein upper and lower sets of the non-contact rotary transformers are arranged; each set of the non-contact rotary transformer comprises a first non-contact rotary transformer and a second non-contact rotary transformer; each first non-contact rotary transformer is mounted in an outer wall groove of a rotary main shaft; each second non-contact rotary transformer is mounted in an inner wall groove of a guide movable sleeve; and the two sets of the non-contact rotary transformers work independently and respectively and rotate and move relatively. The magnetic resistance between a magnetic core on the rotary main shaft and a magnetic core on the guide movable sleeve is kept constant and is not influenced by rotary movement, so as to guarantee the stability of signal transmission and be easily applied to underground strong-vibration and impact environments.

Description

Technical field [0001] The invention relates to the field of oil and natural gas drilling, in particular to a wireless two-way signal transmission device between a main shaft and a looper in a downhole rotary steering drilling tool. Background technique [0002] With the emergence and development of extended reach wells, highly deviated wells and long horizontal wells, conventional drilling tools have been difficult to meet the needs, while downhole rotary steering drilling tools have high ROP, high wellbore quality, and difficulty in sticking. Advantages, it has broad application prospects in the field of petroleum drilling. A guide looper that can rotate around the main shaft of the drilling tool is usually installed on the downhole drilling tool, and three to four hydraulic thrust control units are evenly distributed on the looper. During the drilling process, the downhole electronic measurement and control system separately adjusts the output thrust of the hydraulic thrust c...

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problem of data exchange between the measurement-while-drilling system on the rotating spindle and the electronic measurement and control system on the guide looper in the prior art, realize the radial transmission of signals between the rotary drill pipe and the guide looper, and be suitable for strong vibration in the downhole , shocking environment, the embodiment of the present invention provides a wireless two-way transmission device for signals between the rotary spindle and the guide looper in the downhole rotary steerable drilling tool

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