Resettable downhole torque limiter and related methods of use

摘要

Disclosed is a torque limiter having driver mandrel and driven axially aligned mandrels, a piston movable into and out of an engaged position wherein the driver and driven mandrels are coupled together to transmit torque there between. Hydraulically locking the movable piston in an engaged position. Disengaging the hydraulic lock when during rotation when a specified torque magnitude is exceeded to allow relative rotation between the mandrels. Resetting the torque limiter by hydraulically locking the piston in the engaging position when relative rotation ceases or is reduced.

主权项

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.