... Drive Systems in oil and gas drilling operation, DDZ(T) drill pipe elevators are forged from high quality ... from 250t (2250kN) to 500t (4500kN), and cover pipe sizes from 3½" to 5½" OD, IU, EU, ... conform to API elevator links, DDZ(T) drill pipe elevators bear API monogram as per API requirements, ... and marked with size of drill pipe and rated working capacity.2. Main Parameters ModelType ...