1)certified by ISO9001&API 2)Fast drilling rate 3)Strong cutting structure durability 4)be used for water well, oil field, underground, construction, geothermal, directional boring 5)Be used to drill low compressive strength,soft formation 6)various of model and dimension avaliable 7)rubber seal or metal seal 8)IADC:437,517,637,617 9)high quality and competitive price 10)including drill rods,drill collar,rerun steel tooth bits, ,used drill bits stock,used mud pumps,etc
