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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...

Hybrid drill bit conventional PDC and roller-cone bits. It is saving cost, Improves Drilling Efficiency.

This type of Bi-center bit mainly used for medium to medium hard compressive and abrasive formation.

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