Why do you think there are no American companies of stature in this biz? Or are there?
Probably taxed out of the market and IMO if Halliburton had the contract he would be screaming 100 times louder.
There are no American lines anymore because shipping is a commodity and thus is destined to always find its pricing declining on the long run.
As just like any commodity, it's production goes overseas because American firms have costs that are jsut to high to survive.