Resonance enhanced rotary drilling module
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United States of America Patent
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Mar 7, 2017
Grant Date -
May 1, 2014
app pub date -
Dec 1, 2011
filing date -
Dec 7, 2010
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Abstract
Provided is apparatus for use in resonance enhanced rotary drilling, which apparatus comprises:
- (i) an upper load-cell for measuring static and dynamic axial loading;(ii) a vibration isolation unit;(iii) optionally an oscillator back mass;(iv) an oscillator for applying axial oscillatory loading to the rotary drill-bit;(v) a vibration transmission unit;(vi) a lower load-cell for measuring static and dynamic axial loading;(vii) a drill-bit connector; and(viii) a drill-bit,wherein the upper load-cell is positioned above the vibration isolation unit and the lower load-cell is positioned between the vibration transmission unit and the drill-bit, and wherein the upper and lower load-cells are connected to a controller in order to provide down-hole closed loop real time control of the oscillator.
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