Patent ID: 8550185
Filing Date: 2013-10-08
Classification: E21B

Abstract:
1. A method for biasing erratic motion of a bottomhole assembly of a drilling system, the bottomhole assembly including a drill bit, to provide for drilling a borehole in an earth formation in a predetermined direction relative to the earth, the method comprising steps of: determining a direction relative to the earth in which the drilling system is tending to drill; comparing the direction with the predetermined direction; providing a biasing system that is configured to bias erratic motion of the downhole assembly in the borehole during drilling toward the predetermined direction, wherein the biasing system is coupled with the bottomhole assembly and held geostationary on the bottomhole assembly, and wherein the biasing system is configured to produce a circumferentially varying lateral compliance around the bottomhole assembly; and moving the biasing system on the bottomhole assembly to change the circumferentially varying lateral compliance when the comparing step determines the direction is not adequately aligned with the predetermined direction.