SYSTEM AND METHOD FOR CONTROLLING A DRILLING SYSTEM FOR DRILLING A BOREHOLE IN AN EARTH FORMATION.

摘要

A method for using dynamic motion of a drilling system in a borehole being drilled or cored in an earth formation by the drilling system, the drilling system comprising a drill bit and a drill-string, to control the drilling system, comprising: controlling dynamic interactions between a section of the drilling system and an inner surface of said borehole; and using the controlled dynamic interactions between the section of the drilling system and the inner surface of said borehole to control the drilling system and using a drill collar or gauge pad non-concentrically coupled with the drilling system to dynamically interact with the inner surface.