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

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

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

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...