Patent ID: 9255449
Filing Date: 2016-02-09
CPC Classification: E21B

Claim Text:
1. A drill bit, comprising: a surface that includes a pad configured to extend and retract from the surface; a motor; a linearly movable member coupled to the motor; a hydraulic unit configured to apply force on the pad wherein rotation of the motor in a first rotational direction causes the linearly movable member in a first direction to cause the hydraulic unit to exert a force on the pad to extend the pad; and a piston coupled to the linearly movable member, wherein the movement of the linearly movable member moves the piston in the first direction, and the hydraulic unit includes a fluid chamber and a chamber coupled to the pad and wherein the movement of the piston in the first direction compresses a fluid in the fluid chamber that in turn exerts pressure on the chamber to cause the chamber to move in the first direction.