BP's efforts to shut off its broken well

BP installed a new cap on its damaged Macondo well, while its primary relief well burrowed to within 30 feet of intersecting the oil field nearly 18,000 feet beneath rock and sea.

What happened

BP installed a new cap on its damaged Macondo well in the Gulf of Mexico this week, while its primary relief well burrowed to within 30 feet of intersecting the Macondo nearly 18,000 feet beneath rock and sea. The new cap, 30 feet high and 160,000 pounds, fits the well more snugly and could, in theory, seal it completely. But first, U.S. officials told BP to provide evidence that closing the cap’s valves would not cause so much pressure to build up inside the damaged well’s casing that it would rupture, causing new leaks beneath the seabed. While talks and tests continued, up to 60,000 barrels a day of oil gushed from the well, unimpeded. Meanwhile, BP officials said the relief well might intersect the Macondo by the end of July, allowing engineers to plug the damaged well with heavy mud and cement.

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