Three specialist vessels and a working team from Dana, InterMoor, Subsea 7, Wood Group PSN and Optimus have replaced nine chains, each weighing 150 ton in 24 days.

The mooring chains have been developed by Vicinay in Bilbao, Spain.

Last week, the vessel has extracted 200 million barrel from the North Sea.

Dana, Shell UK, Esso Exploration and Production UK and Endeavour are JV partners in the Triton FPSO with 51.966%, 26.42%, 20% and 1.614% interests, respectively.

Dana Petroleum UK managing director Paul Griffin said, "The project was delivered safely, under budget and ahead of schedule in a compressed timescale."

"This positive news highlights Dana’s leadership capability in the complex execution and organisation of the project while collaborating with key suppliers," Griffin added.