Since I wrote yesterday, it’s become obvious they have the necessary sawblade at the bottom of the Gulf. Now it is stuck… This may be a good thing for now.
The leak can be greatly reduced by the simplest action…
1. cut slot in riser pipe.
2. insert steel plate, greatly reducing diameter of pipe open to the ocean.
3. The velocity of escaping crude will be greatly diminished.
4. NOW do the Top Kill. With the flow reduced, the injected mud and junk has a chance to form a solid blockage.
I’ll update with a diagram on how to reinforce a steel plate flow restrictor.