Abstract: A bearing assembly includes a first race having a first set recesses disposed on an upper surface thereof. Wherein a first set of bearing elements are disposed within the first set of recesses and the first set of bearing elements extend upwardly from the first set of recesses at an inclination relative to a vertical axis of the first race. A second race having a second set of recesses disposed on an upper surface thereof. A second set of bearing elements are disposed within the second set of recesses and the second set of bearing elements extend upwardly from the second set of recesses at an inclination relative to a vertical axis of the second race.

Abstract: A downhole drill bit drive motor assembly which provides a bilateral low resistance path from the upper end of a downhole drill bit drive motor to the lower end of such a motor by employing an insulated wire or group of several wires through the rotor of the motor. The drive motors provide a drive torque to a drill bit based on the flow of drilling fluids through the motor and includes an outer case, a motor stator, a motor rotor, a coupling to connect the motor rotor to an output shaft and a bearing to support both axial and radial loads. Fixed electrical contacts are provided at the upper end of the drill bit drive motor to provide connection to wireline for transmission of data from that point to the surface or other higher points. Rotary electrical contacts that provide continuous electrical contact as a rotary portion rotates with respect to a stationary portion are provided at the upper, lower, or both ends of the rotor.