DIRECTIONAL DRILLING METHOD FOR A STEERABLE ROTARY DRILLING DEVICE

摘要

A method for orienting a rotary drilling system, the rotary drilling system being comprised of a rotatable drilling string, a drilling string communication system and a drilling direction control device, the drilling direction control device comprising a deflectable drilling shaft connected with the drilling string. The method includes the steps of communicating a desired orientation of the drilling string to the drilling direction control device and actuating the drilling direction control device to deflect the drilling shaft to reflect t he desired orientation. Further, the method may include the steps of orienting the drilling string a t a desired orientation and sensing the desired orientation of the drilling string with the drilling string communication system, which steps are performed prior to the communicating and actuating steps.