I had an idea that the well head coud be surrounded with liquid carbon dioxide or nitrogen or wutever iz cold enuf to freeze the oil into a plug.
The advantage woud be that it woud slow it down gradualy to avoid blasting the whole shabang out uv the ground.
Freezing fluid coud also be sent way deep into the hole to do the same thing or in conjunction with freezing the outside.
Sum obvious problemz are that it coud take more freezing liquid than can possibly be supplied and that the pipes may bekum brittle at such low temps and break.
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