Oil giant BP PLC on Wednesday planned to release the conclusions of its internal investigation into the rig explosion that killed 11 workers and led to the massive Gulf of Mexico spill.
BP was striking first with a detailed report about what it believes went wrong on the Deepwater Horizon on April 20. It comes just days after a key piece of evidence in the explosion was raised to the surface but has not yet been analyzed. It also comes as the blame game heats up in Washington and in the courtroom.
BP was unlikely to place too much onus on itself, given the hundreds of lawsuits and billions of dollars of liabilities it faces. In public hearings, the company has tried to shift some blame to rig owner Transocean Ltd. and cement contractor Halliburton. BP was leasing the rig from Transocean and owned the well that blew out a mile under the Gulf surface, spewing some 206 million gallons of oil into the water over three months.
BP’s report is far from the final word on possible causes of the explosion, as several divisions of the U.S. government, including the Justice Department, Coast Guard and Bureau of Ocean Energy Management, Regulation and Enforcement, are also investigating.
Also, a key piece of the puzzle — the blowout preventer that failed to stop the oil from leaking from the well off the Louisiana coast — was raised from the water on Saturday. As of Tuesday afternoon, it had not reached a NASA facility in New Orleans where government investigators planned to analyze it, so those conclusions will not be part of BP’s report.
Investigators know the explosion 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 igniting.
But they don’t know exactly how or why the gas escaped. And they don’t know why the blowout preventer didn’t seal the well pipe at the sea bottom after the eruption, as it was supposed to – abcnews