Offshore Norway Rigs Could Require Safety Modifications
Floating oil and gas rigs offshore Norway could require safety modifications following a fatal incident on the Norwegian Continental Shelf in December last year, according to DNV GL.
One person was killed and four injured when the COSLInnovator was struck by a wave Dec. 30, damaging its living quarters in the process. The wave struck the unit on the port side of the front bulkhead of the forward box girder and smashed 17 windows, the Petroleum Safety Authority Norway reported earlier this year.
In order to prevent similar incidents occurring in the future, several companies, including DNV GL, teamed up to find out exactly what happened during the event, what improvements are needed and how to implement these improvements.
So far, issues have been raised surrounding air gaps, which comprise the distance between the underside of a rig’s lowest deck and the highest wave crest. Certain rigs that classify as having a negative air gap could be made to undergo some changes.
“There are two options for semi-submersibles with a defined negative air gap; operational restrictions or some modification,” a spokesperson for DNV GL told Rigzone.
“Operational restrictions means that the actual rig might not be fit for all areas at all times. Examples of modifications could be steel plates to replace windows at the lower deck,” he added.
When asked how expensive modifications could prove to be, the spokesperson declined to speculate.
“Costly modification…depends on its definition. We are not in a position to define that term,” said the DNV GL representative.
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