Oil & Gas American group to start North Sea decommissioning workUS OIL firm Hess said yesterday it planned to start decommissioning work at four North Sea fields before the end of the year. October 4th 2011, 10:26 am 2 min read Facebook An icon of a facebook f logo. LinkedIn An icon of the LinkedIn logo. Twitter An icon of the Twitter logo. US OIL firm Hess said yesterday it planned to start decommissioning work at four North Sea fields before the end of the year.