Allseas has executed more than 300 projects and installed approximately 25,000 km of subsea pipeline worldwide. Project scopes range from straightforward pipeline installation jobs to complex pipelay and heavy lift contracts involving design, engineering, fabrication, installation and/or removal, large subcontracted scopes for diving, dredging, rock dumping, and systems to prevent plastic waste spreading into open water. Click on the world map to find out more about our current and challenging past projects.

Current projects

Nord Stream 2

The largest pipeline installation job in Allseas’ history comprises twin 48-inch gas pipelines running 1230 km from Russia to Europe across the Baltic Sea.

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Ninian North

Removal, transfer and disposal of 12,500 t topsides and partial jacket from UK continental shelf

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Brent Alpha

Single-lift removal of the Bravo Alpha topsides – the third of Shell UK’s four Brent field platforms – and delivery to UK recycling yard

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Tyra Redevelopment

Single-lift removal of platform facilities weighing over 34,000 t from the North Sea’s Tyra field and delivery to recycling yards in Denmark and the Netherlands

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Port of Antwerp

Plastic collection system in Port of Antwerp’s “Doeldok” zone. The introduction of a passive catcher system will significantly reduce the quantity of pollutant plastics  found in the waters around Doeldok.

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Vlaamse Waterweg

Collection system to prevent plastic entering a weir in Evergem, in the Belgian province of East Flanders.

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Nieuwe Maas river

Plastic catcher for the Nieuwe Maas flowing through the city centre to remove macro plastics at the surface and in the water column.

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Verversingskanaal

A study for Hoogheemraadschap van Delfland to investigate plastic pollution in the Verversingskanaal in Scheveningen.

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Project history