Drill bit with a force application device using a lever device for controlling extension of a pad from a drill bit surface

摘要

In one aspect, a drill bit is disclosed that in one embodiment includes a pad configured to extend and retract from a surface of the drill bit and a force application device configured to extend and retract the pad, wherein the force application device includes a force action member that includes a lever action device configured to extend and retract the pad from the drill bit surface. In another aspect, a method of drilling a wellbore is provided that in one embodiment includes: conveying a drill string having a drill bit at an end thereof, wherein the drill bit includes a pad configured to extend and retract from a surface of the drill bit and a force application device that includes a lever action device configured to extend and retract the pad from the surface of the drill bit; and rotating the drill bit to drill the wellbore.

主权项

1. A drill bit, comprising:
a member configured to extend and retract from a face section of the drill bit; and a force application device in the drill bit configured to extend and retract the member from the face section of the drill bit, the force application device including a drive device that includes a lever action device, wherein the lever action device includes a lever operatively coupled to the member and a piston coupled to the lever, wherein a motion of the piston in a radial direction causes the member to extend and retract from the face section of the drill bit along an axis of the drill bit.