Petroleum Safety Authority halts diving on Alvheim fieldNews // October 13, 2006
The Petroleum Safety Authority (PSA) in Norway issued an order to Marathon Petroleum Norge last month preventing the company from undertaking further manned diving operations on the Alvheim Field after reports of several recent incidents.
The order was issued during a meeting at the PSA's offices, and required Marathon to investigate the incidents and take whatever measures were necessary. The deadline for complying with the order was October 2nd, but it is not known whether this was met.
The PSA reportedly received notification of a total of five serious MUO incidents in which Technip Offshore Norway and the facility DSV Wellservicer were the contractors for the diving operations, with Marathon as operator.
Three incidents related to the secondary life support unit, which divers carry on their backs to provide breathing air for 10 minutes in the event that the normal air supply should fail.
In two incidents, personnel neglected or forgot to add a chalk box to the SLS. This device cleans carbon dioxide from breathing air.
This omission would have led to serious problems, and could have caused a dangerous situation for a diver that needed the extra air.
A third SLS incident involved damage to air hoses on this equipment during the dive.
Two incidents were linked to power supply from the diving vessel, in which the vessel lost power from multiple generators.
The PSA said there had also been what it called "unsatisfactory reporting" of several of the incidents.