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Flexible fallpipe vessel

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

World record

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

More information

Equipment leaflets

Here we offer leaflets with specifications for our featured equipment. Please feel free to contact us if you would like more information.

Bravenes
  • Vessel

    Bravenes

  • Year of construction

    2016

  • Loading capacity

    12,000 tons

Nordnes
  • Vessel

    Nordnes

  • Year of construction

    2001

  • Loading capacity

    24,000 tons

Stornes
  • Vessel

    Stornes

  • Year of construction

    2011

  • Loading capacity

    26,000 tons