Flexley Vessel Seven Seas

The requirement for Seven Seas was a multifunctional, powerfull and reliable SURF (Subsea Umbilicals, Risers and Flowlines) vessel capable of flex lay and field development. To reduce building and operational costs, the design and technology used for the Seven Seas is based on the Seven Oceans. The vessel is designed to operate in the Atlantic Triangle: US Gulf, West Africa, Brazil.

The vessel’s pipelay installation is fully integrated into the vessel’s design. Two under deck carousels and one above deck carousel can take a vast load of flexible pipe and umbilical. Although the main role will be flexlay the vessel is multifunctional and also capable of deepwater offshore construction work, rigid reeled lay, J-lay and ROV work.

The Seven Seas is equipped with a large work moonpool with bottom door. The bottom door is constructed in such a manner that it streamlines the flow under the vessel whilst sailing. In open position, the door forms part of a damping cofferdam structure that prevents surge in the Moonpool during operations. The pipelay ramp can accommodate up to 24” flexible pipe from the ships carousels as well as rigid reeled pipe from reels and double joint rigid pipes in J-lay mode.

IHC Merwede Offshore & Marine
Rivierdijk 586, 3371 ED Hardinxveld-Giessendam
P.O. Box 5, 3370 AA Hardinxveld-Giessendam
The Netherlands

T +31 184 677 300
F +31 184 677 301
shipyard.mws@spam-preventionihcmerwede.com