End in sight for BP’s calamitous spill

BP's new cap seems to be working and the issue now is how to shut down the damaged well permanently.

What happened

With BP’s new cap putting an apparent end to the worst oil spill in U.S. history, the oil giant and the White House this week debated how best to shut down the damaged Macondo well permanently. BP said the well was sufficiently stable to warrant a “static kill,” in which drilling mud, followed by cement, is pumped into the top of the well to seal it for good. But U.S. officials expressed caution about subjecting the well to additional pressure, citing the potential for a rupture in the well’s metal casing and surrounding rock, a disastrous scenario that could allow oil to seep up uncontrollably through cracks in the sea floor. The White House appeared to prefer to wait a week or two for the completion of a relief well, which would seal the original well deep under the ocean floor. “It would be very premature to say the well is shut in,” said Adm. Thad Allen, the government’s crisis manager.

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