First wind turbine transition piece installed by DP2 vessel

02 December 2009

Jumbo Offshore's engineers and the crew of DP2 vessel Jumbo Javelin have successfully installed their first wind turbine transition piece (TP), off the UK's south-east coast.

This is the first time that a TP has been transported and installed with only one DP2 vessel. The installation trial included leveling and grouting operations and the removal of the TP. This means Jumbo Offshore is now able to deliver a range of installation services for offshore wind farms.

After loading the 255 tonne TP in Flushing, UK, it was transported to the offshore location. There, the Jumbo Javelin positioned itself next to the monopile and lifted the TP from her lower hold onto the monopile. After leveling the TP to its final position, the grouting procedure was tested.

To give crew safe access from the Jumbo Javelin to the installed TP, as well as efficiently guiding the grout hoses, the Ampelmann II was used. This ship-based, self stabilizing platform actively compensates all vessel motions to make offshore access safe and easy. In 20 landings, a total of 72 transfers were made to and from the TP. Furthermore, the Ampelmann supported the grout hose.

It was the first time that a TP was placed on a monopile from a free floating vessel on DP. The whole operation was completed in about 24 hours.

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