GREAT focuses on Manufacturing PDC bits, Tricone rock bits, PDC reamers, Hole openers

Steel tooth drills are suitable for extremely soft formations with low compressive strength and high drillability such as clay, mudstone, chalk, etc..

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

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.