2H Launch Grouped SLOR™ Deepwater Riser Concept

2H Offshore have launched their latest deepwater riser design, the Grouped SLORTM. This is a development of the 2H Single Line Offset Riser arrangement that has been field-proven on the Kizomba-A & B projects and will soon be installed on Petrobras’ P-52.

2H has conceived and developed the Grouped SLOR system with extensive design and structural analysis work. , Installation contractor, Subsea7, has now invested in hydrodynamic tank tests on this riser system such that they can propose it as a SURF solution for current deepwater field developments. John Mair, Global Technology Manager of Subsea7, commented, “We were particularly keen on this concept because it suits the capabilities of our latest Flex & J- Lay construction vessel Seven Seas and thus allows us to provide a field optimised solution additionally such a system can be installed using tow-out maximising installation flexibility.”

The arrangement allows a large number of SLORs to be located adjacent to each other without the risk of clashing. This is achieved by a lightweight guide frame that constrains the lateral movements of all SLORs. The system is optimally suited for field developments where the number of risers is high and can be optimised so that the riser angle is splayed out below the frame to optimise field layout and interface with seabed flowlines. The frame and foundations cane be preinstalled from a small anchor handling vessel and the riser can either be J-lay’d or towed.