Allseas has won what it has described as the largest ever single decommissioning contract for the UK North Sea by weight with operator TAQA.
The deal covers removal and disposal of several platforms across the Northern North Sea - the Eider Alpha, Tern Alpha, North Cormorant and Cormorant Alpha installations.
The combined weight of the topsides and jackets to be removed is around 114,000 tonnes, making this the largest single offshore UK Continental Shelf decommissioning contract scope to date.
The aim of the project is to reuse or recycle a minimum of 95% of the materials from the dismantling process.
The platforms are located close to each other, approximately 100 kilometres north-east of Shetland, in water depths ranging from 150 to 167 metres.
All structures will be lifted and removed to shore as single units using Allseas’ heavy lift vessel Pioneering Spirit.
A spokesman for Allseas said: "We are proud to be TAQA’s contractor for this major decommissioning contract and looks forward to close collaboration with TAQA to prepare and execute the safe and sustainable decommissioning of these NNS assets.
"Platform removals are planned post 2025."
Kingswells-based TAQA manages the UK North Sea exploration and production portfolio for UAE-headquartered utilities and energy group Abu Dhabi National Energy Company (TAQA).
The company’s extensive late-life portfolio positions it at the forefront of decommissioning in the UK.
Earlier this summer, the company completed the safe and successful removal of the Brae Alpha West drilling rig and the Brae Bravo upper main jacket.
Over its 33-year lifetime, Brae Bravo produced more than 500 million barrels of oil equivalent and is widely recognised within the industry as an iconic asset in the pioneering Brae fields.