Bits of NRB STANDARD series provide reliable and cost effective performance for large verities of drilling operations. They are available in a large range of different design options for the optimization of technical parameters, taking into account particular drilling conditions and economic constraints of your drilling operations.
• Cutting Structure: Steel teeth or tungsten carbide inserts.
• Bearing: Open, sealed roller or sealed journal bearing.
• Circulation System: Open central port or side jets.
• Leg shirttail protection: No leg shirttail protection. Optional hardfacing and TCI on 1/3 or 2/3 of leg shirttail can be added for additional protection.
• Cone gage: No gage protection. Hard grain alloy can be added for protection of the cone gage.
