Patent ID: 8066085
Filing Date: 2011-11-29
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 mechanism that is configured to allow radial erratic motion of the downhole assembly and to bias the of radial erratic motion of the downhole assembly in the predetermined direction, wherein the biasing mechanism comprises a gauge pad asymmetrically coupled with the bottomhole assembly and held geostationary on the bottomhole assembly; and rotating the biasing mechanism around the bottomhole assembly when the comparing step determines the direction is not adequately aligned with the predetermined direction.