FIELD: process engineering.
SUBSTANCE: invention relates to rock cutting tools used for well drilling, particularly, to PDC tools, for example, drill bits. This tool comprises the body with PDC cutters. Note here that working surface furnished with cutters is shaped to inverted conical surface with cone base radius-to-height ratio of 2/3. Cutters at inner inverted conical surface can optionally be fully backed up. Cutters to calibrate well walls are arranged in steps in direction of tool spinning.
EFFECT: higher efficiency of tool operation.
6 dwg
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