

Thialf: a character in Norse mythology who was Thor’s servant.
The Heerema Thialf, a semi-submersible crane vessel (SSCV), is a rather massive presence in coastal waters. The vessel is 661 feet long and 470 feet high, with a lifting capacity of up to 14,200 metric tons, and is the second-largest of its kind.
The Thialf, which set a world record in 2000 by lifting the 11,883-metric-ton Shearwater topside structure in the North Sea, will be driving piles for 54 Vestas 15 MW wind turbines and a substation structure that are part of Equinor’s controversial Empire Wind project.
John Smith tells me that the Thialf is one of the heavy lift vessels being considered for removing California offshore oil and gas platforms. The vessel is too large for the Panama Canal and would have to make the trip around South America or across the Pacific, depending on where it was last working.
The Thialf’s day rate has not been disclosed, but is likely greater than $500k. Equinor claimed to be losing $50 million/week when the project was paused. Thialf costs were presumably a significant chunk of those losses.
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