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US 10,370,901 B2Granted
Steering system
AssigneeITI Scotland Limited
InventorMarian Wiercigroch
Life of this patent
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Abstract
Provided is an apparatus for use in directional drilling, which apparatus comprises: (a) a drill bit; (b) at least one steering actuator capable of exerting a longitudinal force on the drill bit, so as to change the direction of drilling; and/or (c) at least one drill bit steering insert, capable of extending and retracting so as to change the cutting characteristics of the drill bit and thereby change the direction of drilling. Further provided is a method of directional drilling, employing the apparatus of the invention.
Claims17
An apparatus for use in resonance enhanced directional drilling, which apparatus comprises:
- (a) a rotary drill bit;
- (b) an oscillator;
- (c) a plurality of steering actuators arranged about the axis of rotation of the drill bit, wherein said plurality of steering actuators are capable of driving the oscillator to generate an axial oscillatory load with a varying frequency so as to achieve resonance with a material being drilled and wherein each of the plurality of steering actuators is capable of exerting the axial load on a side of the apparatus;
- and
- (d) a resonance enhanced drilling (RED) vibration isolator spring.
2 more elements
Dependencies are inferred from the claim text.