Hey, hit it with a nuclear bunker buster...Send it down 700 feet and detonate it...
That’ll get the helium out.
HA! And end life as we know it, at least, for certain, in the US. You are aware, (are you not?) that Yellowstone is the mouth of a gigantic volcano the size of three states, thousands of times larger than Krakatoa.
And the explosion will sound really funny!