Hey yeah Dave the dome need not even be enclosed at the top.

Likely better if not due to the previous difficulty with the frozen hydrate

Just a large tall cylinder over the well head would give hydraulic
advantage
to the drilling mud.

Where now the drilling mud is being expelled by the velocity 
of the upwelling oil the differences in area between the well pipe
and an open dome placed over the well head gives hydraulic advantage
to the drilling mud to cut off the flow of outpouring oil!

It's exactly the same principle as in a mechanics hydraulic jack.

Literally too simple for it not to work, not only in this case but in any
future recurrences of same or similar blowout events.

It's simple Jr. H.S. science, 7th, 8th grade absolute tops.

Lets see ANYONE shoot holes into this!

The drilling mud MUST overcome the outpouring oil and its greater density
assures it will flow down into the well head.

I feel so incredibly stupid it did not occur to me previously
as often as I've worked on hydraulic brakes on motorcycles in the course
of rebuilding same.

No cryogenics.
No explosives.
No nukes.
What's to fail?

They've been dancing all around this since day 10 and apparently not seen
the forest for the trees!

Everything they need is already on site.

It's the merged synthesis of the two methods they've tried up to now.

But it's BETTER.
Way better due to the advantage given by the difference between the
circumferences of the pipe and the open dome with drilling mud contained
within.

Just as a lever gives mechanical advantage to force so too
does the differences in area do the same in regards to hydraulic force.

Too simple!
Too obvious.
Everyone is looking for the complex and complicated but the template for
the solution exists in a garage mechanics lift.
 
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