Material Selection -- With API standard oil drill pipes, dependable performance

    With the unique two thick molding technology of  pipe joints .Transition zone steady and smooth,  reduce mud through resistance

    Domestic initiation one-piece drill pipe, IF heat treatment technology, mechanical properties higher than similar products

    Joint screwed have been treated by liquid nitrogen treatment process.Depper layer than traditional phosphating process into the deeper, the surface hardness is taller, so as to  prolong the service life of drill pipe