Hard Rock Drilling TCI Tricone Roller Well Drill Bit with Good Price. Wide IADC Code Range: Available codes from 114 to 637 for various formation types and drilling speeds. Premium Cutting Structure: Features tungsten carbide hard facing and inserts for enhanced wear resistance. Multiple Bearing Options: Choice of sealed, non-sealed, journal, or roller bearings for high-speed drilling. Robust Gauge Protection: Includes gauge trimmers and inserts to increase gauge holding capability and bearing life. Advanced Sealing System: Uses premium O-rings and pressure difference compensating systems for optimal lubrication. Fast Delivery Time: Standard delivery within 3-5 days after receiving down payment. Comprehensive Quality Control: Strict inspection and testing performed on every order before shipping. Full Drilling Tool Supply: Provides complete set including drill pipes, bits, rigs, pumps, and compressors.