PetroMaterials has full production process to perform pipe end upsetting, heat treatment, friction welding and threading on processing drill pipe at our plant in Japan. We can manufacture drill pipe in sizes ranging from 2-3/8 to 6-5/8 inch.Range 3 pipe is available.Drill collars from PetroMaterials are available with the following features: Normal Size from 2-7/8to 11 All steel bars must be full length heat treatment. and HWDP ,KELLY ,CASING
