TCI tricone bit: 1)certified by ISO9001&API 2))used for water well, oil field ... -117,127,437,517,617,637 TCI tricone bit: 1)certified by ISO9001&API2)Fast drilling rate3)Strong cutting structure durability4 ... Ability 5000 Pieces/month Delievery Time within 30 days our company is specializes in drill bits, drill pipe, Mud pump and ...