ELECTRIC PULSE WELL DRILLING METHOD, AND DRILLING BIT Russian patent published in 2012 - IPC E21B7/15 E21C37/18 E21B10/00 

FIELD: mining.

SUBSTANCE: drilling is performed at optimum parameters. Specific energy generated on unit length of interelectrode gap is accepted considering specific compression strength of mine rock; movement spacing of drilling bit electrodes during the time period between two high-voltage pulses is selected considering the number of pulses, which is required for electrodes to cover the distance equal to the length of interelectrode gap, and required number of pulses is accepted considering optimum high-voltage pulse energy required for generation of energy in interelectrode gap, which is stored in source of high-voltage pulses, and number of drilling bit electrodes. High-voltage electrodes (1) of drilling bit are installed so that they can move on axis (3) that is electrically connected to high-voltage current lead (5). High-voltage current lead (5) is separated from housing (4) by means of high-voltage insulator (6). Rock-destructing elements (7) with hard-alloy cutters (8) are fixed in the end face part of housing (4). Lengths of interelectrode gaps between high-voltage electrodes (1) and earthed electrodes (2), as well as rock-destructing elements (7) earthed through housing (4) are equal.

EFFECT: application of method using the bit improves the method efficiency.

5 cl, 2 dwg, 1 tbl