NEW ORLEANS (AP) — BP’s blown-out oil well in the Gulf of Mexico is not yet plugged for good, and work on what’s been touted as the permanent solution will need to continue, the federal government said Friday.
Retired Coast GuardAdm. Thad Allen, the government’s point man for the spill response, said crews must move forward drilling the relief well even though officials were still evaluating the best way to finish it.
“The relief well will be finished,” he said. “We will kill the well.”
BP had thought the mud and cement pumped in from above the leak may have essentially killed the well. But the relief well will allow engineers to pump in mud and cement from below, which is intended to permanently seal the well.
Work on the wells was stopped this week because of bad weather.
The decision to resume work on the relief wells means a key milestone in the crisis that wreaked havoc on the Gulf Coast’s economy and ecosystem remains days off. However, Allen has repeatedly insisted on an “overabundance of caution” when it comes to permanently plugging the well.
Officials had been testing the pressure beneath the cement plug currently in place. Steady pressure would indicate the presence of cement in the space between the inner piping and the outer casing, likely indicating a permanent seal.
But because pressure rose during the testing, the scientists concluded that space still needs to be plugged in.
“That’s been the mantra all along, that they wanted to do the bottom kill,” he said.
Proceeding with the relief well makes sense, said Bob Bea, a petroleum engineering professor at the University of California, Berkeley, who is conducting his own investigation into the disaster.
Too little is known about how much cement might be inside the space between the inner piping and outer casing to be confident the well is permanently plugged, he said.
“Everything we know at this time says we need to continue the work with the relief wells,” he said. “We don’t know the details of how they plugged the well from the top. We don’t know the volume of material they put in the well bore, and without that we can’t tell how close to the bottom of the well they got.”
Drilling of the first relief well began in early May. Since then, the drill has been guided some three miles from the surface and two miles beneath the sea floor to within 30 to 50 feet of the target. The drill is about as wide as a grapefruit, its target less than half the size of a dartboard.
It’s unclear when the drilling could be finished. Officials had projected as early as Friday before the nasty weather forced the operation to a halt. Drilling that final stretch is a time-consuming and careful process as engineers work to make sure they don’t miss.View Entire Story
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