Invention Grant
US09103175B2 Drill bit with hydraulically-activated force application device for controlling depth-of-cut of the drill bit 有权
钻头采用液压激活力施加装置,用于控制钻头的切削深度

Drill bit with hydraulically-activated force application device for controlling depth-of-cut of the drill bit
Abstract:
A drill bit includes a pad configured to extend and retract from a surface of the drill bit. A force application device extends and retracts the pad. The force application device includes a hydraulically-operated rotating member coupled to a speed reduction device configured to apply a force on drive unit that applies a force on the pad to cause the pad to extend from the drill bit face.
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