FIELD: oil and gas production.
SUBSTANCE: procedure for drilling borehole in rock is realised with perforator with drill rod attached to it. A bore bit, an impact device and rotary motor are arranged on the end of the drill rod. According to the procedure the rotary motor rotates the drill rod and the bore bit. Pressure pulses are directed to rock with the impact device via the drill rod, the bore bit and break rock. The implemented here bore bit corresponds to a cone bit; the impact device transmits pressure pulses of low amplitude at high frequency so, that coefficient of load (α) of the bore bit is at least 0.075.
EFFECT: raised efficiency of drilling and increased dimension of well according to efficient and cost-saving procedure.
6 cl, 3 dwg
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