Rotary steerable drilling tool with a linear motor

摘要

A rotary steerable drilling tool with an electromagnetic steering system can include a drill collar, a bit shaft, an orientation control module, a mud tube, a mud tube coupler, a universal joint, a mud sealing device, and a drill bit. The bit shaft can be mechanically coupled to the drill collar through the universal joint and the orientation control module and rotate about the universal joint. The orientation and the inclination angle of the bit shaft against the drill collar can be controlled by the orientation control module with the electromagnetic steering system. The orientation control module can include a guide track mounted on the inside wall of the drill collar, arrays of electromagnets mounted on the guide track, a positioning frame, a permanent magnet mounted on the positioning frame, a coupling tube, and at least two bearing wheels. A corresponding electromagnetic steering method is also provided.

主权项

1. An orientation control module comprising:
a guide track mounted on the inside wall of a drill collar, said guide track having an upper part and a lower part, a first array of electromagnets mounted to the upper part of the guide track, a second array of electromagnets mounted to the lower part of the guide track, a positioning frame positioned between the upper part of the guide track and the lower part of the guide track, said positioning frame further comprising: one or more bearing wheels disposed at the end of the positioning frame, an array of permanent magnets coupled to the positioning frame, said permanent magnets positioned to interact operably with said first array of electromagnets and second array of electromagnets.