GREAT's High-quality Bits Series III

Normally drag bits are 3 wings, but we can make 4 or 5 wings following your drawings or samples.

GREAT DRILL customized Rock reamers size from 10'' to 72''.

Overview 120 ° U-shaped Roller bitGREAT has customized manufacture several types of roller bit . The traditional roller bit was cut by tricone bit . So it is including No.1 ,No.2, No.3 Cone cutters ....

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