... to 7 daysMarketCanada, USA, Middle east ,Africa, EuropeApplicationPetroleum & gas ,water well ,mining and tectonic industries ,oil field, construction, geothermal, directional boring ... low compressive strength, very soft formations. TCI bits maximize the use of both conical and chisel tungsten carbide inserts of large ... sealing for bearing durability. 3 1/2"-26" Kingdream water well reamer bit