High-quality Drill Bits from China

Raise Boring Cutters OverviewThe raise boring cutters is mainly used for the construction of vertical shafts, ventilation shafts inclined shafts, pressure regulating shafts and escape shafts , and it...

GREAT DRILL BITS can be customized and supply various sizes , type downhole motor according to the drilling demand.

This is a 7 blade Matrix body PDC bit , with Stinger cutters back row, used for very abrasive formation.

Core barrel with roller bit is used in very strong rock formations(compressive strength > 100Mpa)