| 摘要 |
<p>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 screw driven by an electric motor that linearly moves a drive unit 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 configured to extend and retract the pad, wherein the force application device includes a screw driven by an electric motor that moves a drive unit to extend the pad from the drill bit face; and rotating the drill bit to drill the wellbore.</p> |
