Great Rock Reamer Hole Opener Quality Control

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

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...

Overview Roller bitGREAT has customized manufacture several types of roller bit . It is including 90 ° U-shaped Roller Bit, 120 ° U-shaped Roller Bit and Starry Sky Roller Bit.The 90 ° U-shaped Rol...

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