‘Seajacks Scylla’ mooring system upgrade
The world’s largest jack-up vessel ‘Seajacks Scylla’, recently visited the Rotterdam Offshore Group (ROG) terminal in the Waalhaven, after her first successful assignment on phase 1 of the Veja Mate Offshore Windpark project.
During the vessel’s stay at the Waalhaven facility, ROG performed an upgrade on the vessels mooring system. ROG worked around the clock to complete the project within strict deadlines and to the highest quality levels required by the vessel owners and to class satisfaction.
After the upgrade, Seajacks Scylla sailed to Esbjerg where the vessel has been mobilised for the 2nd Phase of the Veja Mate offshore wind farm project which includes the turbine installation of 67 Siemens SWT-6.0-154 wind turbines.
Seajacks Scylla had already completed phase 1 of the project, installing 67 foundation monopiles at the site located some 95km north west of the island of Borkum in the German exclusive economic zone (EEZ). Each monopile weighs approximately 1300 tonnes, has a diameter of 7.8 metres and each transition piece is over 25metres in length and weighs approximately 360 tonnes.
Seajacks Scylla, which Seajacks describes as ‘the world's largest and most advanced wind farm installation and offshore construction vessel’ was delivered by the Samsung Heavy Industries Shipyard in Geoje, Republic of Korea in 2015. The vessel has been designed to operate in the UK Round 3 offshore zones, Scottish territorial waters and the other North West European markets.
Based on the Gusto MSC NG14000X design, the ABS-classed Seajacks Scylla, has more than 8,000 tonnes of available variable deck load. Equipped with a 1,540 tonne leg-encircling crane and a usable deck space in excess of 5,000 square metres, the unit is outfitted with 105 metre legs with the ability to install components in water depths to 65 metres. The rig is capable of meeting the installation needs of jumbo-monopiles, jackets, and turbines of future wind farms in deeper waters further from shore.
John Vingoe, Operations Manager Seajacks UK Ltd said: “Seajacks are glad to say that the recent works conducted by Rotterdam Offshore Group, were done in a highly professional and timely manner. Dealing with Martin and his team to upgrade Seajacks Scylla has been a positive experience all round, and we highly recommend their workforce and services. The Port of Rotterdam is an ideal place to conduct works of this kind, given the proximity of quality suppliers and subcontractors, and we look forward to working there again soon. Scylla is now fully engaged in Wind Turbine Generator construction at the Veja Mate wind farm, and the high quality installations committed by ROG have been key to making this happen.”
By Jake Frith
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