320mm Roller Cone Bit

320mm HDD Rock Reamers Roller Cone Bit Replaceable Cone Bit For Hard Formations Designed for requirement from horizontal directional drilling tools factory, we would like to be the OEM factory of Block Leg Roller Cone Bits. Cone Diameters, Tungsten Carbide Insert Shapes, Heights, Sensity, Length of Legs, etc, all could be customized according to your specific needs. The materials and production processes are strictly complying with API specifications. Speifications of Block