Thomas B. Dellinger

Reduction of the frictional coefficient in a borehole by the use of vibration

Drilling technique for providing multiple-pass penetration of a mineral-bearing formation

Method of drilling deviated wellbores

Method of placing pipe into deviated boreholes

Method for improving cuttings transport during the rotary drilling of a wellbore

System of drilling deviated wellbores

Method and apparatus for reducing the differential pressure sticking tendency of a drill string

Preventing buckling in drill string

Rotary drilling drill string stabilizer-cuttings grinder

Method and system for displacing drilling fluid from a drill string in a well drilling system