Sarens has helped to remove decommissioned platform topsides formerly of the North Sea's Valhall oilfield complex, located off the coast of Norway.
Working in close cooperation with client Allseas, Sarens successfully loaded out and transported several topside modules from the quarters platform, which was no longer in use.
Sarens outfitted its barge Louis with suitable grillages that could support the approximately 3,850-tonne topsides. The barge sailed from Ghent, Belgium to Norway, in preparation for loading operations.
With the barge on site, Sarens and Allseas began demobilising the topsides, which took approximately one week. Allseas' construction vessel, Pioneering Spirit, removed the topsides from the jacket and transported them to the disposal yard at Stord, Norway.
The topsides were transferred to the Sarens barge, which was positioned below Pioneering Spirit. This transfer relied on the construction vessel's topside lifting system, with careful ballasting to correct for the offset centre of gravity.
The barge then transported the topsides to the disposal yard. After the sea fastening brackets were released, the topsides were lifted and Sarens drove 120 axle lines of SPMTs (K24-ST) onto the barge beneath the structures.
The barge was ballasted for stability as the SPMTs transported the topsides onto the quay and set them down on disposal support stands.