Patent ID: 9181756
Filing Date: 2015-11-10
Classification: E21B

Abstract:
1. A drill bit, comprising: a pad configured to extend and retract from a surface of the drill bit; and a force application device configured to extend the pad from the surface of the drill bit, the force application device including: an electric motor that rotates a drive screw; a drive nut coupled to the drive screw, wherein the drive screw rotation in a first direction causes the drive nut to move in a first linear direction and rotation of the drive screw in a second direction causes the drive nut to move in a second linear direction; and a drive shaft coupled to the drive nut configured to exert force on the pad to extend the pad from the surface of the drill bit, wherein the drive shaft exerts force on a lever that applies force on a drive unit to cause the drive unit to extend the pad from the surface of the drill bit.