Patent ID: 8122977

Claim:
A cutting device for downhole operations comprising: a body having a longitudinal axis; a stationary cutting structure disposed on the body and including a first cutting diameter; and a moveable cutting structure coupled to the body and including an outer cutting surface located at a radially outermost portion of the movable cutting structure; wherein the moveable cutting structure is moveable between a first position forward of the stationary cutting structure along the body axis and wherein the outer cutting surface is coincident with or radially inward of the circle defined by the first cutting diameter, and a second position upward relative to the first position along the stationary cutting structure and along the body axis and wherein the outer cutting surface extends beyond the circle defined by the first cutting diameter to an expanded cutting diameter, the outer cutting surface being maintained at the radially outermost portion of the movable cutting structure during transition of the movable cutting structure from the first position to the second position.