Patent ID: 7172039

Claim:
A method of rotating a downhole tool, comprising: placing a tubular string having a motor therein, the motor comprising: a housing having a shaped inner bore; a rotor having a plurality of extendable members disposed on the outer surface thereof; a first fluid pathway through the downhole tool, wherein the fluid pathway includes at least one inlet, at least one outlet and at least one chamber formed between the shaped inner bore and the rotor; and a second fluid pathway through the downhole tool, wherein the second fluid pathway is separate from the first fluid pathway; extending the members into the at least one chamber to form a differential surface area between an outer surface of the rotor and the shaped inner bore; pumping fluid through the at least one inlet to pressurize the at least one chamber; creating a force on a substantially flat differential surface area, thereby causing the rotor to rotate; exhausting fluid through the at least one outlet; and pumping a ball through the second fluid pathway to an area below the motor.