The Dutch office of Centrica Energy E&P requested Conbit to install a diesel oil storage tank underneath the helideck of the Grove platform, located on the UK Continental Shelf. Conbit performed the installation engineering and the actual installation. The project has been another example of below deck lift directly form a supply vessel to an offshore platform.
The Grove platform is located approximately 133 km north east off the coast of Great Yarmouth on the UK continental shelf. The tank was manufactured at SEW Oil & Gas in Broek op Langedijk in the Netherlands. Conbit took over the operation from the quayside at Den Helder. The Island Earl Supply Vessel was selected to transport the tank to the Grove platform, which meant a 10 hour journey.
The project started with a comprehensive engineering study. The engineering covered the installation method, the structural calculations, the sea fastening and lifting procedures. The main challenge in such a project is the lifting method. Lifting directly from a supply boat from underneath a helideck requires a supply vessel which can be located close enough to the platform and can remain its position. High speed winches are also required to lift from this moving vessel.