... airDelivery timeWithin 3 to 7 daysMarketCanada, USA,Middle east ,Africa,Europe Hejian Huanyu Petroleum Machinery Co., Ltd. in China.1) Product ... bit,tricone bit,tungsten carbide insert rock bit,tri-cone drill bit ,3 cone bits,rotary bit, TCI tricone bit,PDC drill bit ,diamond core bit,bicenter bit,single cone bit , reamer bit ...