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Report: Gas bubble triggered rig blast
100-ton container placed over Gulf of Mexico oil well leak
By NOAKI SCHWARTZ and HARRY R. WEBER
The Associated Press
updated 9:18 p.m. ET, Fri., May 7, 2010
ON THE GULF OF MEXICO - The deadly blowout of an oil rig in the Gulf of Mexico was triggered by a bubble of methane gas that escaped from the well and shot up the drill column, expanding quickly as it burst through several seals and barriers before exploding, according to interviews with rig workers conducted during BP's internal investigation.
The timeline described in the documents provides the most detailed account of what may have caused the April 20 blast that killed 11 workers and touched off the underwater gusher that has poured more than 3 million gallons of crude into the Gulf.