Patent ID: 9650844
Date: 2017-05-16
CPC Classifications: E21B

Claim:
1. A downhole apparatus for drilling operations, comprising: a drive shaft with a longitudinal axis, a spherical portion extending radially from the longitudinal axis, and first and second interfacial surfaces proximate the spherical portion; an outer housing at least partially around the spherical portion; a radial bearing coupled to the outer housing between the spherical portion and the outer housing and comprising first and second interfacial surfaces in contact with the respective first and second interfacial surfaces of the drive shaft to transmit or receive torque in corresponding first and second rotational directions, wherein the first interfacial surface of the drive shaft is positioned on a first oscillating disk coupled to the drive shaft, and the second interfacial surface of the drive shaft is positioned on a second oscillating disk coupled to the drive shaft; and a first axial bearing coupled to the outer housing and in contact with a first end of the spherical portion to axially secure the drive shaft with respect to the outer housing.