| 主权项 |
1. A wellbore tool that is actuable through a plurality of positions comprising:
a tubular housing including an upper end, a lower end, an axis extending between the ends and a wall defined between an inner surface and an outer surface; a tool mechanism capable of being reconfigured from a first inactive position to an active position; an indexing mechanism for reconfiguring the tool mechanism, the indexing mechanism including an indexing ring in the tubular housing, the indexing ring including an inner bore and being rotatably movable about the axis, and an inner sleeve positioned within the tubular housing and extending through the inner bore, the inner sleeve having an axial bore extending therethrough and a wall thickness, and a plurality of pawls forming a seat on the inner sleeve, each of the plurality of pawls being pivotally connected to the inner sleeve and having an inner facing surface open to and biased into the axial bore and a back side surface positioned for engagement with the indexing ring; and an actuator for passing through the axial bore and contacting the inner facing surfaces to drive the plurality of pawls radially out into full meshing engagement with the indexing ring to thereby drive the indexing ring to rotate and to move the tool mechanism from the first inactive position toward the active position. |
