Transocean already moved their corp domicile to Switzerland. If they proceed with this ban others could follow them. Plus these rigs and boats float..they will float away to other shores. Rates may drop a little until they find a home, but the industry will go along without us.
My company moved their headquarters and top executives to Switzerland already for what I suspect are the same reasons as Transocean.
Most of our business is now outside the US and the US Taxes are expected to continue to climb. We moved after the 2008 elections.