Patent ID: 8555986

Claim:
An actuation assembly for a downhole tool having a tool housing and an actuation member, the actuation assembly comprising: a downhole power unit having a power unit housing and a moveable shaft; and a stroke extender having an extender housing and an extender mandrel longitudinally movable within the extender housing, the power unit housing operably associated with the extender housing, the moveable shaft operably associated with the extender mandrel; wherein the extender housing is operably associated with the tool housing and the actuation member; wherein the extender mandrel is operably associated with the actuation member such that oscillatory movement in first and second longitudinal directions of the moveable shaft relative to the power unit housing causes oscillatory movement in the first and second longitudinal directions of the extender mandrel relative to the extender housing which causes progressive movement in the first direction of the actuation member relative to the tool housing, thereby actuating the downhole tool; and wherein the downhole tool does not include a J-slot mechanism.