公司选用美国MTI惯性摩擦对焊机进行钻杆接头和管体的焊接。整个对焊过程由电脑自动完成，使钻杆焊接质量得到了有效保证。采用先进的整体热处理工艺调质管体，确保管体性能优异；焊缝采用中频感应、大功率集流线圈加热，管体旋转、内外冷却的热处理工艺，使摩擦焊区热影响区缩小，机械性能更加均匀，更加稳定。
        PDM adopts American MTI inertial friction welding machine to welding too joints to pipe ends. The whole process is automatically operated by computer, which guarantees high performance of welding area. All drill pipes are full length heat treated. Weld bead are heated by medium frequency induction heating loops. When quenching and tempering, the pipe keeps rotating, and the internal and external surfaces are cooled at the same time, so as to make the heat affect zone narrower and the mechanical properties stabler.