... 537,617 4.oil,water well Mill tooth Tricone ROCK Bit -TCI Tricone Bit Specifications: Bit typeIADC ... high drillability,such as soft shale,clay and salt bed,etcHardfaced gage and all tooth surfaces.0 ... high drillability,such as soft shale,clay and salt bed,etcHardfaced gage and all tooth surfaces, and ... stringth and high drillability,such as shale ,clay,salt bed and soft limestone,etc.Hardfaced gage and ...