| 摘要 |
FIELD: rock cutting tools, particular, drill bits; applicable in well drilling. SUBSTANCE: cutting-shearing drill bit has body with central water course, rock cutting wings secured to drill bit body and central hydrodynamic radiator in form of cylindrical swirling chamber with tangential outlet channels, twisting parameter equalling A=1.5, and output nozzle made in form of flexible branch pipe. EFFECT: provision of conditions for cutting and final cutting of zone of precutting of rock by the jet of drilling mud over the entire surface of bottom hole and improved cleaning of bottom-hole zone. 3 dwg |
