MUD MOTORS WITH THRUST BEARING WITH ENHANCED TORQUE
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United States of America
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Issued Date -
Feb 20, 2020
app pub date -
Oct 25, 2019
filing date -
Oct 25, 2019
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Abstract
An apparatus for use in a wellbore is disclosed that in one non-limiting embodiment includes a rotatable member, a thrust bearing coupled to the rotatable member, wherein the thrust bearing includes a bearing stack that further includes a unitary inner race member that includes a number of axially spaced inner races around an outer surface of the unitary inner race member. A set of bearing elements is placed in each inner race, and a separate outer race secures each set of bearing elements in each inner race.
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