Tungsten Carbide, Roller Cone Bit
8 1/2" IADC117-837
4 1/2" API Reg.Pin
Soft to Hard Formation
Journal Bearing, Rolling Bearing
Metal Sealed, Rubber Sealed
Blue, Res, Green or as Your Requirement
2000m
America, South Africa, Middle East
Kingdream, lilin, Deris
Woodencase or as Your Requirements
Cover almost all IADC code