System and method for damping vibration in a drill string

Details System and method for damping vibration in a drill string System and method for damping vibration in a drill string

E - Fixed Constructions

21

B

E21B 17/04 (2006.01)

Patent

CA 2755416

A torsional bearing assembly for transmitting torque to a drill bit, may include first and second members and a ball bearing. The first member is capable of being mechanically coupled to a source of the torque so that the first member rotates in response to the torque. The first member has a first groove formed therein. The second member is capable of being mechanically coupled to the drill bit so that the drill bit rotates in response to rotation of the second member. The second member is mechanically coupled to the first member so that the second member can translate in relation to the first member in a first direction substantially coincident with a longitudinal centerline of the torsional bearing assembly. The second member has a second groove formed therein that faces the first groove so that the first and second grooves form a passage extending substantially in a second direction. The ball bearing is disposed in the passage for transmitting the torque between the first and the second members.

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