Damen Verolme Rotterdam was chosen as the location of this maintenance work thanks to the shipyard’s capacity and access to its facilities. Given the height of Innovation’s leg sections, Damen Verolme Rotterdam shipyard’s mammoth drydock offered the possibility to lift the vessel’s legs with a crane installed inside the drydock while the vessel was sitting on the dock blocks, allowing maintenance work to be carried out safely and efficiently.

The most significant aspect of this refit was the modification and re-installation of Innovation’s aft legs, each measuring 89 metres in length. Reinforcement work was carried out on the legs to enable them to cope with an increased rate of jacking operations, driven by the increased efficiency of the installation works.

Once the vessel was drydocked the two aft legs were removed and two new middle sections were inserted on the quayside, the refurbished leg finally being assembled from three parts. In total 47 metres of section per leg were replaced.

A PIECE OF WORK

To overhaul the jacking motors, all 48 gearboxes of the aft legs were removed, overhauled in the shipyard’s workshop, and reinstalled on the vessel. Additional general maintenance work completed the refit, which included a box-cooler renewal, maintenance to the spudcan shoes, replacement of one aft thruster, small steel repairs and the installation of a new pile gripper.

Given the demanding scope of the vessel maintenance, project Innovation was a real challenge for the shipyard. Thanks to good cooperation with the client, and the support and dedication of the staff on-site, the project was completed on schedule and to Damen’s trademark high standards.

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