Projects
Allseas has executed more than 300 projects and installed over 27,500 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
Port of Rotterdam CO2 Transport Hub and Offshore Storage
Key construction role in the realisation of the first carbon capture and storage (CCS) project of its kind in the Netherlands
Darwin Pipeline Duplication
Construction of 123-kilometre, 26-inch/34-inch dual diameter carbon steel export nearshore pipeline that will connect the Barossa Gas Export Pipeline to the Darwin LNG (DLNG) facility in Australia’s Northern Territory.
Gennaker West & East
Transport and installation (T&I) of two substation platforms (OSS) for the Gennaker offshore wind
development in the German Baltic Sea
Malampaya Phase 4
Installation of key pipelines and umbilicals for latest development of Malampaya deepwater gas field in the Philippines
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.
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
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.