Application of Friction Butt-welding Process for Oil Drill Pipe

The paper describes the friction butt-welding process adopted by Bohai NKK Drill Pipe Co., Ltd.to produce oil drill pipes, covering such aspects as major technical parameters, technological conditions and process and meter pressure-setting methods, etc.Operational practice over years has demonstrated advantages of the said friction butt-welding process for oil drill pipe such as high productivity, satisfactory quality and stable welding performance.