| 主权项 |
1. A downhole assembly for earth-boring applications, comprising:
a selectively actuatable earth-boring tool; and an actuation mechanism located above the selectively actuatable earth-boring tool in the downhole assembly, the actuation mechanism comprising:
a housing comprising an internal bore defining a flow path through the housing;an actuation member supported within the housing and sized and configured to selectively actuate the selectively actuatable earth-boring tool; anda movable sleeve located within the internal bore and movable between a first position and a second position responsive to changes in flow rate of fluid flowing through the flow path, the movable sleeve being biased toward the first position,wherein the actuation member is in an initial, pre-actuation position when the movable sleeve is initially located in the first position, the actuation member is movable to a subsequent, pre-actuation position when the movable sleeve is located in the second position, and the actuation member is released from the actuation mechanism when the movable sleeve is returned to the first position. |
