ELECTRIC PULSE WELL DRILLING AND ELECTRIC PULSE DRILL TIP Russian patent published in 2014 - IPC E21B7/15 E21C37/18 

FIELD: oil-and-gas industry.

SUBSTANCE: invention relates to well and shaft drilling. Drilling of solid bodies by electric pulse discharges comprises destruction of said bodies by high-voltage electric discharges between HV and grounded electrodes by electric pulse drill tip. Descending flow of flushing electrically conducting fluid destructs solid bodies to form gas cavity nearby working area naked end of HV electrode. Drill tip comprises HV and grounded electrodes isolated by insulator furnished with openings for feed of flushing fluid. HV electrode is shaped to skirt while central grounded electrode is spring loaded. Said drill tip is equipped with second grounded electrode composed of ring arranged above HV electrode.

EFFECT: higher efficiency and ecological safety.

2 cl, 2 dwg, 4 tbl