Rotary steerable drilling tool with electromagnetic steering system

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 an array of electromagnets, an array of permanent magnets, a rotor, and a set of bearings. The orientation control module can be coupled to the bit shaft through the rotor. The movement of the rotor can be driven by the interaction between the array of electromagnets and the array of permanent magnets.

主权项

1. An orientation control module comprising:
an elongated cylindrically-shaped hollow housing; a rotor substantially having a body shape of an axially elongated cylinder having a hollow interior portion, rotatably disposed within said hollow housing, said rotor further having an upper portion with an open end, and lower portion with an open end, said hollow interior portion allowing a bit shaft to be positioned inside said rotor; a plurality of bearings contactibly disposed between an inner surface of said hollow housing and an outer surface along the circumferences of the upper portion and lower portion of said rotor; a second plurality of bearings contactibly disposed between an inner surface of said rotor, and an outer surface of said bit shaft disposed within said rotor; a plurality of electromagnets disposed on an inner surface of said hollow housing; and, a plurality of permanent magnets disposed on an outer surface of said rotor.