Patent ID: 9429189
Filing Date: 2016-08-30
CPC Classification: E21B,F16C

Claim Text:
1. A bearing assembly, comprising: a first member telescoped into a tubular member to form an annulus therebetween; at least two axially spaced sets of bearings mounted in the annulus in annular grooves in one of the first member and the tubular member; and at least two bearing races slidably mounted on the other of the first member and the tubular member positioned to engage the at least two axially spaced sets of bearings, each bearing race having an upward-facing race and a downward-facing race; wherein the bearings of the at least two axially spaced sets of bearings are in contact with either the upward-facing race or the downward-facing race when in a first position, and are in contact with either the downward-facing race or the upward-facing race when in a second position.