Patent ID: 9097073
Filing Date: 2015-08-04
Classification: E21B

Abstract:
1. A milling tool comprising: a tool body having a central axis therethrough, the tool body configured to couple with a tool string; at least one cutting block deployed in an axial recess disposed in the tool body; at least one milling blade deployed in an axial slot disposed in the cutting block; and an actuation mechanism arranged and designed to, while the tool body is in a downhole environment, move the at least one cutting block radially relative to the central axis of the tool body between cutting block retracted and extended positions, and to move the at least one milling blade relative to the central axis of the tool body with the at least one cutting block while the at least one cutting block is moved radially between cutting block retracted and extended positions, and to further move the at least one milling blade relative to the at least one cutting block between mill blade retracted and extended positions.