Norway's Petroleum Safety Authority (PSA) has slammed oil major Equinor and Singapore shipyard Sembcorp Marine for costly flaws in supervising and executing a big-ticket floating production, storage and offloading newbuilding project for the Barents Sea.

"The PSA became aware in the first half of 2020 of weld-quality errors in the Johan Castberg FPSO hull," wrote the regulators in a 1 June report. "Extensive repair work is required."

The problems were first reported in July 2020 by TradeWinds' sister newspaper, Upstream.