Patent ID: 7938200

Claim:
A downhole motor for drilling a wellbore, comprising: a pumping apparatus comprising; a valve system configured to control the flow of a first fluid and a second fluid, wherein the valve system fully rotates around a central axis of the pumping apparatus; a first chamber configured to receive the first fluid and the second fluid, wherein the first fluid flows in an axial direction from the valve system into the first chamber; a first flexible diaphragm disposed within the first chamber, wherein the first flexible diaphragm is disposed parallel to a direction of flow of the first fluid and wherein the first flexible diaphragm is configured to separate the first and second fluid, wherein the first flexible diaphragm is configured to transfer a hydraulic energy between the first fluid and the second fluid; a second chamber configured to receive the first fluid and the second fluid, wherein the first fluid flows in an axial direction from the valve system into the second chamber, a second flexible diaphragm disposed within the second chamber, wherein the second flexible diaphragm is disposed parallel to a direction of flow of the first fluid and configured to separate the first and second fluids; a motor portion coupled to the pumping apparatus and configured to receive the second fluid and convert the hydraulic energy of the second fluid into a mechanical energy, thereby creating a torque; and a bit shaft coupled to the motor portion, configured to receive the torque from the motor portion and the first fluid from the pumping apparatus.