The pipe body of the drill pipe is made of high quality alloy steel, and the joint of the drill pipe is made of high quality alloy structural steel.Adopting advanced friction welding technology for production and processing, the drill pipe is featured with high bending strength and solid welding, which can guarantee the requirement of straightness in deep hole drilling, high fatigue strength and long service life.It is mainly applied to Wells, oil Wells, geological exploration and so on, and spread throughout the country in coal fields, oil drilling, water conservancy and hydro power, railway, highway, tunnel construction and other industries.