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"It is an engineer's nightmare," said Ed Overton, a Louisiana State University professor of environmental sciences. "They're trying to fit a 21-inch cap over a 20-inch pipe a mile away. That's just horrendously hard to do. It's not like you and I standing on the ground pushing
-- they're using little robots to do this." Since the Deepwater Horizon rig exploded on April 20, eventually collapsing into the Gulf of Mexico, an estimated 20 million to 40 million gallons of oil has spewed, eclipsing the 11 million that leaked from the Exxon Valdez disaster. BP PLC's Doug Suttles said that although there's no guarantee the company's latest cut-and-cap effort to close off the leak will work, he remained hopeful, but wouldn't guarantee success. Engineers have put underwater robots and equipment in place this week after a bold attempt to plug the well by force-feeding it heavy mud and cement
-- called a "top kill" -- was aborted over the weekend. Crews pumped thousands of gallons of the mud into the well but were unable to overcome the pressure of the oil. The company said if the small dome is successful it could capture and siphon a majority of the gushing oil to the surface. But the cut and cap will not halt the oil flow, just capture some of it and funnel it to vessels waiting at the surface. The British oil giant has tried and failed repeatedly to halt the flow of the oil, and this attempt like others has never been tried before a mile beneath the ocean. Experts warned it could be even riskier than the others because slicing open the 20-inch riser could unleash more oil if there was a kink in the pipe that restricted some of the flow. Eric Smith, an associate director of the Tulane Energy Institute, likened the procedure to trying to place a tiny cap on a fire hydrant that's blowing straight up. "Will they have enough weight to overcome the force of the flow?" he said. "It could create a lot of turbulence, but I do think they'll have enough weight." But BP's best chance to actually plug the leak rests with a pair of relief wells but those won't likely be completed until August. The company has carefully prepared the next phase, knowing that another failure could mean millions more gallons spew into the ocean and lead to even more public pressure. And they say they have learned valuable lessons from the failure of a bigger version of the containment cap last month that was clogged with icelike slush.
[Associated
Press;
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