Seven Waves arrives at Huisman for flexlay system and crane to be installedVessel & ROV News // November 6, 2013
Subsea 7's latest newbuild, Seven Waves, recently arrived at Huisman in The Netherlands for the vessel's 550 tonne flexlay system and 400 tonne offshore mast crane. The vessel was built by IHC Merwede.
The 550 tonne flexlay system will be the highest capacity flexlay system onboard a pipelay vessel and was designed and built for the installation of flexible pipelines in water depths of up to 3,000m. The tower is tiltable to allow connection of flexible risers to rigid pipelines which are retrieved from the seabed. The systemís tensioners are retractable to allow for safe and efficient A&R and PLET installation procedures. They are equipped with a squeeze control system which allows for accurate control of squeeze loads, which can be important when handling umbilicals.
The 400 tonne crane has a deepwater lowering system and an active heave compensation system to counteract the vesselís heaving motions when landing a load on the seabed.