Patent ID: 9243457
Filing Date: 2016-01-26
CPC Classification: E21B

Claim Text:
1. An underreamer for increasing a diameter of a wellbore, comprising: a body having an axial bore extending at least partially therethrough; a sleeve arranged and designed to move a first axial distance within the body; an actuator within the bore and coupled to the sleeve, the actuator arranged and designed to move the sleeve the first axial distance; and a cutter block movably coupled to the body, wherein the cutter block is arranged and designed to move at least the first axial distance with respect to the body in response to hydraulic pressure in the bore, and wherein the cutter block moves from a first outer diameter to a second outer diameter as the cutter block moves the first axial distance, wherein the actuator comprises an arm having a rod extending radially outward therefrom, wherein a longitudinal axis extending through the arm is parallel to a longitudinal axis extending through the body.