A continuous bend flexible/rigid riser system is provided for coupling a subsea location to an offshore platform or vessel. The riser system comprises a first rigid pipe section coupled at its upper end to the platform. A plurality of intermediate pipe sections are mutually coupled end to end, and are...http://www.google.de/patents/US5615977?utm_source=gb-gplus-sharePatent US5615977 - Flexible/rigid riser system
