Gulf Oil Spill Relief Well: Will It Really Work? More Backup Plans

nytimes.com:

Experts said it was conceivable that the "kill" procedure would not be effective, particularly if only a single relief well was used and the bottom of the well bore was damaged in the initial blowout. Pumping large quantities of erosive mud into the well could even end up damaging the well further, hindering later efforts to seal it.

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