Projects
Allseas has executed more than 300 projects and installed over 26,000 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
Yeu and Noirmoutier OSS installation
Pioneering Spirit will install the offshore substation for the Yeu and Noirmoutier islands’ offshore wind farm development off France’s Pays-de-la-Loire coast
Tamar Expansion
Installation of a third deepwater gathering line for the Tamar field expansion project, which will meet growing demands for safe and reliable gas supply in the East Mediterranean.
DolWin4 & BorWin4
Transport and single-lift installation of two 900-megawatt converter platforms for the DolWin4 and BorWin4 offshore grid connection projects in the German North Sea.
Heather Alpha
Engineering, preparation, removal and disposal of 13,000-tonne topsides in the UK North Sea.
N05A pipeline
Pipeline installation scope for one of the most important Dutch offshore natural gas developments in the last 15 years.
Norfolk Boreas
Transport and installation services for the UK’s Norfolk Offshore Wind Zone, one of the largest offshore wind developments in the world.
Brent Charlie topsides removal
Single-lift removal and transport to shore for recycling of 31,000-tonne Charlie topsides, the fourth and final iconic Brent platform
Southeast Gateway Pipeline
Construction of near 700 km-long natural gas pipeline supplying southeast Mexico with reliable, affordable energy.
TAQA UK’s Northern North Sea platforms
Major platform decommissioning job comprising four topsides and three steel jackets weighing combined ~115,000 tonnes
Morecambe Bay
Removal of two 11,000 t disused gas production platforms and connected subsea infrastructure from the Irish Sea and transport to disposal yard in East Scotland for recycling.
Valhall OVD & Hod removals
Removal and disposal of multiple decommissioned platform facilities from the Valhall field, offshore Norway.
Catchy Mini
Allseas developed a waste removal system for the Waddenhaven on the island of Terschelling.
Patje Plastic
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.