REMOVAL OF DRILL BIT FROM ROD

摘要

FIELD: mining.SUBSTANCE: claimed method comprises the locking of rod with crown bit by mid element and the transfer of lengthwise forces thereto to opposite sides. Said force is developed by feeding the electric pulse discharge through the fluid filling the cavities of drill bit and rod. Note here that electric discharge is fed through the water after placing of the drill bit with rod in the reinforced sealed vessel.EFFECT: higher efficiency of removal.2 cl, 1 dwg