Van Oord’s new trencher, the Dig-It, has expanded the company’s cable laying and burial capabilities.
The remote-controlled trench jetting and cutting system can be deployed in offshore wind construction. Van Oord used the Dig-It for the first time this week on the Borkum Riffgrund 2 project in the German sector of the North Sea.
Dig-It
The Dig-It, also known as the Q Trencher 1600, is the most powerful of the Q trencher series with a total installed power of 1200 kW. After a cable has been laid on the seabed, Van Oord’s Dig-It will bury it to required depth. Depending on the configuration and soil characteristics, the trencher can bury cables down to 3 m depth.
The Dig-It is a Tracked Remotely Operated Vehicle (TROV), with its tracks as its primary method of propulsion. The trencher can be operated in two different modes, jetting and chain cutting.
Borkum Riffgrund 2
In 2016, Ørsted contracted Van Oord to transport, install and bury infield cables for the Borkum Riffgrund 2 offshore wind farm. Van Oord has deployed its dedicated cable-laying vessel Nexus to install the infield cables, including interlink cables to the Borkum Riffgrund 1 Offshore Substation.
The Nexus started cable installation on 15 April, while the Dig-It, mobilised on the offshore supply vessel Rem Saltire, started burying the cables last week. The cable installation works should be finished in July 2018.
Once it is completed in 2019, the Borkum Riffgrund 2 offshore wind farm will deliver green energy to 460,000 households. The offshore wind farm is located 54 km off the coast of Lower Saxony, Germany.
Picture: Dig-It on deck.
