Patent ID: 7810584
Filing Date: 2010-10-12
Classification: E21B

Abstract:
1. A method for directional drilling a subterranean borehole, the method comprising: (a) deploying a drill string in a borehole, the drill string including a plurality of interconnected sections of drill pipe and a bottom hole assembly including a drilling motor and a drill bit, the drilling motor including a bent housing along its axis; (b) causing the drilling motor to rotate the drill bit relative to the drill string; (c) rotary drilling the borehole by rotating the drill string from a surface location at a first high rotation rate; (d) rotary drilling the borehole by rotating the drill string from the surface location at a second low rotation rate; (e) repeating (c) and (d) a plurality of times so as to continuously rotary drill the borehole using a drill string rotation rate that alternates back and forth between the first high rotation rate and the second low rotation rate without slide drilling.