I am sure there is no way I can explain this, but you all seem pretty smart, so here goes. What if they created a chamber using a larger diameter cylinder, say 10" larger than the pipe coming from the well head. There would be a hole in the bottom which is exactly the outside diameter of the broken pipe on the well head. The top of the chamber is left open at this point. The chamber is placed over the well head and welded into place while the oil continues to spew out the open top. The top of the chamber would have braces welded to it which would act sort of like drawer glides. An example would be like how the top of a cigar box slides into grooves cut in the sides. These braces would act like the grooves in the cigar box. But obviously with a lot more surface area to hold the pressure of the flow.A top could be slid into place, cutting off the oil flow and held there by the braces. The top is then welded or bolted to the chamber. The top could have a pipe with a valve installed that would connect to the ship above to capture the oil while the valve would control the flow. Anyway, I'm no engineer and I actually may be an idiot, but it's just a thought I had. Fire away.....