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I would drop a large inverted cone made of steel or concrete so that it's point obscured the breach. The weight of the plug would keep the oil pressure from pushing it out, while a stabilizing float attached to it's top would prevent the cone from tipping over. Like so:

     |     < Line up to deploying ship
     O
     O     < Stabilizing float
     |
   -----   < Steel/concrete plug
   \   /
  __\ /__  < Breach
     V
Once it settled you could likely pour a block of cement around it...



I think the pressure from the oil coming out would push the point of the cone to the side.

Some modifications to your idea: Use a really long nose guidance rod of titanium or something that is much smaller than the pipe diameter.

Have the plug have a new pipe running through it to allow the oil to gush through, but then have a new kill valve after you seal the plug in place.


I was going for the 'Big Dumb Booster' version... All beef and no brain!

I'm not sure whether the point would get pushed aside, but a guide rod definitely wouldn't hurt!

I think at this point they should just seal the thing off rather than trying to run additional plumbing into it...




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