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Switzerland's Allseas plans world's largest construction vessel

Wednesday, 14 Feb 2018

Swiss offshore services firm Allseas is planning to build a vessel big enough to be able to remove the world’s largest oil and gas platforms when they reach the end of their production lives, its chief executive Edward Heerema has told news agency Reuters.

Allseas’ Pioneering Spirit lifting Shell’s Brent Delta platform (Photo: Allseas)

The vessel, to be called Amazing Grace, is designed to remove the heaviest platforms in a single lift and could reduce decommissioning costs for global oil and gas producers, the firm said.
It would be a bigger version of Allseas’ existing Pioneering Spirit ship, which removed Shell’s Brent Delta platform in the North Sea last year, and would cost about USD 3 billion, Heerema told Reuters.
“We have been asked by the operators to look at the technical possibilities to remove bigger platforms,” he said on the sidelines of a conference, adding that an investment decision on Amazing Grace could come in three years.
If Allseas decides to go ahead, it would set a new record as the biggest such vessel ever built, with 50% more lifting capacity than Pioneering Spirit, at 72,000 tonnes, said the chief executive.