Subsea rock installation is an important service that Van Oord has been supplying to the offshore industry for a long time. ‘We were at the cradle of the development of flexible fallpipe vessels and have been the market leader in the North Sea region for almost 30 years. Market opportunities grew, as did the scale of our operations. In the beginning, we could place 600 tonnes of stone every hour. Nowadays we do 1,800 tonnes an hour,’ says Koos van Oord, Offshore Subsea Rock Installation Manager. Want to read the whole story of a tale of a triumph? Read all about it in our magazine.
Van Oord has two ultramodern flexible fallpipe vessels in its fleet: Stornes and Nordnes. The flexible fallpipe vessel Stornes set a world record while precisely placing rock at a depth of 1,277 m, starting a new era of subsea rock installation. The rock installation operation was part of the development of the Asta Hansteen gas field and the Polared pipeline for the energy company Statoil.
How does it work?
A flexible fallpipe vessel installs rock on a sea or river bed using a fallpipe in order to protect underwater structures or level the bed.
Cost-effective solution for seabed preparation
Our in-house Deep Excavation System (DES) is an invention that allows flexible fallpipe vessels to dredge in depths of 1,000 m or more. This new smart technique creates very little turbidity, which is vitally important in areas with vulnerable marine flora and fauna.
Here we offer leaflets with specifications for our featured equipment. Please feel free to contact us if you would like more information.