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Pulsed Electric Rock Drilling Apparatus with Non-Rotating Bit and Directional Control

  • US 20090050371A1
  • Filed: 08/26/2008
  • Published: 02/26/2009
  • Est. Priority Date: 08/20/2004
  • Status: Active Grant
First Claim
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1. A pulsed power drilling apparatus for passing a pulsed electrical current through a substrate to break the substrate, the apparatus comprising:

  • a non-rotatable drill bit comprising an electrocrushing drill;

    a pulsed power generator linked to said drill bit for delivering high voltage pulses; and

    at least one set of at least two electrodes disposed on said drill bit defining therebetween at least one electrode gap, said electrodes of each said set oriented substantially along a front of said drill bit, at least one of said electrodes disposed so that it touches the substrate and another of said electrodes disposed so that it functions in close proximity to the substrate for current to pass through the substrate.

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