What we do

We are a major contractor in the global offshore energy industry, leading the way in subsea pipeline construction and transport, installation and removal of offshore facilities.

What we do
Activities

From offshore pipelaying to installing and removing offshore structures, Allseas excels in the design and execution of large and complex offshore projects worldwide. Activities include design, engineering, procurement, fabrication and project management.

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Offshore pipelay

Natural gas, oil, carbon capture and water.

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Platform decommissioning

Single-lift removal of the heaviest offshore facilities.

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Platform transportation and installation

A unique solution for the largest, heaviest offshore structures.

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Polymetallic nodule collection

Responsibly recover polymetallic nodules from the ocean floor.

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Our projects worldwide
Southeast Gateway

Southeast Gateway Pipeline

Lorelay
Solitaire
2024 Greater Tortue Ahmeyim

Greater Tortue Ahmeyim (GTA)

Installation of flowline sections for bp’s ultra-deepwater GTA development offshore Mauritania & Senegal, requiring redesign of structures and appendages and bespoke engineering and fabrication to modify S-lay installation vessel for J-mode activities. 

Oceanic
Pioneering Spirit
Barossa Gas Export Pipeline (GEP) hero

Barossa Gas Export Pipeline (GEP)

Installation of a 262-kilometre export pipeline that will connect the Barossa field development to the future Darwin Pipeline Duplication (to be installed by Allseas; link to separate page) and transport natural gas to the Darwin LNG facility in Australia’s Northern Territory.  

Audacia
Fortitude
Alegria
Felicity
Fortress
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Filter projects by activities
Offshore pipelay
Platform decommissioning
Platform transportation and installation

See all projects

Filter projects by activities
Offshore pipelay
,
Platform decommissioning
,
Platform transportation and installation

See all projects