| 摘要 |
A drilling riser joint is provided that may include one or more auxiliary lines (34) having aluminum tubes (48). The auxiliary line includes steel portions (50,52) at each end of the aluminum tube such that flanges of the drilling riser joint contact the steel portion. The aluminum tube and steel portion may be coupled together via box and pin fittings. Each end of the aluminum tube includes a threaded box and one end of each steel portion includes a threaded pin. The steel portions may also include additional box and pin fittings for coupling to adjacent auxiliary lines. |
