... in the exploitation off natural gas,crude oil ,water well ,geological and underground foundation work all over the world. ... standards.Reet XS TCI tricone bit for oilfield /water well drilling bit 1)Main Features 1.Cutting StructureThe durability ... ,medium soft,hard,medium hard,very hard formationApplicationpetroleum&gas ,water well ,mining and tectonic industries ,oil field, construction, geothermal, ...