... Qingzhou, China, we supply different kinds of oilfield equipment including drilling equipment, workover equipment and production equipment, which meets the ... Tubular Goods We supply quality drill pipes, heavy weight drill pipes, drill collars, casing and tubing. Our drill pipes are in accordance with ... 8" to 6-5/8". The steel grades of our drill pipes include E75, X95, G105, and S135.Quality Equipment ...