Patent ID: 9290997
Filing Date: 2016-03-22
CPC Classification: E21B,F16C,Y10T

Claim Text:
1. A downhole tool, comprising: a body; a first bearing member fixed to the body, the first bearing member comprising an outer contact surface defining an outer diameter; a second bearing member rotatable about the first bearing member, the second bearing member comprising an inner contact surface defining an inner diameter, the inner diameter of the second bearing member being larger than the outer diameter of the first bearing member and the inner contact surface of the second bearing member being in sliding contact with the outer contact surface of the first bearing member at an interface; wherein the first bearing member comprises a channel formed in the outer contact surface of the first bearing member, the channel comprising a notch defining a flat surface interrupting an otherwise circular cross-sectional shape of the outer contact surface; a third bearing member fixed to the body, the third bearing member comprising a lower contact surface; and a fourth bearing member rotatable with respect to the third bearing member, the fourth bearing member comprising an upper contact surface, wherein the third bearing member abuts against the fourth bearing member at in interface between the lower contact surface and the upper contact surface, the third and fourth bearing members being configured to rotate slidably relative to one another, wherein at least one of the third and fourth bearing members comprises at least one channel extending, and configured to provide a fluid pathway across, at least one of the third and fourth bearing members.