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Damen perform repairs on Seafox 7

By: Matthew White 25/04/2018 Damen Shiprepair

General Vessels

The 75.5-metre jack-up vessel Seafox 7, came into DSAm for its second five year survey and maintenance works.

With a beam of 32.2 metres, she went into dry dock number four. At 36.2 metres, the width of the dock is not much larger than that of the vessel and careful manoeuvring was required to get her safely in.

The works began with high pressure washing of the bottom, sides and spudcans, after which one of the spudcans was removed for inspection. Two deep well water risers were also removed and transported using SPMTs to the DSAm paint shop for blasting and repainting.

It was identified that some repairs on one of the risers was needed and so it was moved to the yard for repairs before its blasting and repainting. The risers were then reinstalled using the vessel’s own crane.

In addition to the projects arising from the scheduled inspection, other works took place including work on two fresh water tanks. For the first tank, an additional manhole was fitted while the vessel was in dry dock.

The second tank was also fitted with a second manhole while the original one was modified, this time while Seafox 7 was in the layby berth. Following the repairs, they underwent grinding and repainting.

Following ten days in the dry dock, Seafox 7 was refloated and moved out to berth number one. This was used for the main crane works. With a large storage and work area immediately next to the dock, it provided the space necessary for test and support structures.

To perform and test the repairs on Seafox 7’s 270-tonne crane, ten containers were stacked one on top of the other to form the support for the main crane boom. With the boom lowered and secured the repair works could get underway. Once the boom was repaired it was repainted.

To do this a temporary staging was erected inside the crane boom with a total volume of 530m³, while an additional working platform was placed beneath the boom tip to allow repairs to the swivel and the main and auxiliary blocks without moving the boom.

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Damen perform repairs on Seafox 7

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