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US 4,023,628 AGranted
Drilling device utilizing sonic resonant torsional rectifier
OwnerAlbert G. Bodineinventor
Life of this patent
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Abstract
Torsional sonic energy is generated by means of a sonic generator and coupled to an elastic member to cause torsional resonant vibration thereof. The output of the torsional resonant member is coupled through an acoustic rectifier device to a drilling bit to simultaneously provide both torsional and vertical drive components to the bit to effect a spiral "screw" type driving action thereof. The rectifier action results in unidirectional high level pulses of the resonant sonic energy to the bit, causing the bit to be driven both rotatably and downwardly in a pulsating manner.
Claims6
In a sonic drilling device,
- a torsionally elastic member,
- periodic torsional force means directly coupled to said member for torsionally oscillating said member about its longitudinal axis at a torsional resonant frequency,
- a cutting tool, and
- rectifier means coupled to said elastic member and located between the elastic member and the cutting tool for transmitting unidirectional pulses of sonic energy having torsional and longitudinal components from said member to said tool.
1 more element
Dependencies are inferred from the claim text.