210 pieces PDC bits ready shipment

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

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

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

Overview Starry Sky Roller BitGREAT has customized manufacture 90 ° U-shaped Roller Bit, 120 ° U-shaped Roller Bit and Starry Sky Roller Bit.The Roller bit mainly used for Rock reamer (Hole opener) ...