Friction welding drill pipe parameters

1. The pipe body of the drill pipe jacket is cold drawn; The wall thickness of the rod body is positive and the uniformity of the wall thickness is ±0.15mm, and the joint is made of 42CrMoA material. After finishing, the joint is nitrided by vacuum gas, which enhances the hardness and wear resistance of the drill pipe joint. 2. Thread processing In order to exchange the accuracy of the connection of drill pipes, the joint threads are processed by high-precision CNC lathes, and the imported molding tool holder is used for processing. Friction welding drill pipe, with 3 sets of 80-ton, 200-ton and 320-ton friction welding machines, adopts continuous inertia friction welding technology to carry out friction welding between drill pipe joint and drill pipe body, and monitors welding parameters and drill pipe performance through computer. 3. Friction welding drill pipe List several examples of drill pipes used in China: drill pipes are widely used in mine construction, geothermal well construction and water well construction.