Product description Heavy weight drill pipe (hwdp)is an inermediate wight drill stem component whiche is used in conjuction with the drill pipes and drill collars, hwdp is availiable in standard, spiral and nong magnetic design. In same applications, heavy-weight drill pipe also can be used instead of the drill collars. Our hwdp is mabe from one-piece aisi 4145h modified quenched and tempered steel. It is designed for tough drilling environment in vertical and directiona member between drill collar and drill pipe. For directional holes hwdp provides weight on -it and additional stiffness to prevent buckling. Feature and benefits: 1. A center upset or wear pad to increase tube life, reduce hole drage adn differential stickling problems. 2.Conncetions are completed(phosphate coated)to protect them from the elements after machining and to help prevent galling upon initial make up. 3.Thread roots are cold rolled on api and h-90 connections. And pressed steel thread protectors are supplied for standard connections. 4.Handanding and internal coating can be provide on customers request.