On August 24, one of the world’s most profiled platforms turned 15. Sleipner, also known as the carbon dioxide (CO2) platform, does not look its age. Sleipner had a tough start. The construction of the first installation became one of the most dramatic in Norwegian oil history. Shortly before the deck and the concrete substructure for the Sleipner A platform were to be connected, the substructure sank to 200 metres depth in the Gands fiord. With good assistance from Norwegian Contractors…