Patent Number: 9,970,235

Title: Rotary steerable drilling system for drilling a borehole in an earth formation

Abstract: A bottom hole assembly for drilling a deviated wellbore is provided. The bottom hole assembly includes a drill bit and a connected rotary steerable drilling system, or RSS. The RSS includes one or more orientation sensors, a steering unit configured to direct a force through the drill bit and against a rock formation, control electronics designed to send control signals to the steering unit, and power electronics. The steering unit transforms electrical power to linear displacement and force using linear actuators acting off-center to the longitudinal axis of the drill string.

Inventors: Lacour; Bertrand (Daillens, CH)

Assignee:

International Classification: E21B 7/06 (20060101); E21B 41/00 (20060101); E21B 7/04 (20060101)

Expiration Date: 2022-05-15 0:00:00