BP's top kill effort fails to plug Gulf oil leak

BP CEO Tony Hayward
In this May 28, 2010 photo BP CEO Tony Hayward is aboard the Discover Enterprise drill ship during recovery operations in the Gulf of Mexico, south of Venice, La. (AP Photo/Sean Gardner, Pool)
AP Photo/Sean Gardner, Pool

BP admitted defeat Saturday in its attempt to plug the Gulf of Mexico oil leak by pumping mud into a busted well, but said it's readying yet another approach to fight the spill after a series of failures.

BP PLC Chief Operating Officer Doug Suttles said the company determined the "top kill" had failed after it spent three days pumping heavy drilling mud into the crippled well 5,000 feet underwater. More than 1.2 million gallons of mud was used, but most of it escaped out of the damaged riser.

In the six weeks since the spill began, the company has failed in each attempt to stop the gusher, as estimates of how much is leaking grow more dire. It's the worst spill in U.S. history - exceeding even the Exxon Valdez disaster in 1989 off the Alaska coast - dumping between 18 million and 40 million gallons into the Gulf, according to government estimates.

"This scares everybody, the fact that we can't make this well stop flowing, the fact that we haven't succeeded so far," Suttles said. "Many of the things we're trying have been done on the surface before, but have never been tried at 5,000 feet."

The company failed in the days after the spill to use robot submarines to close valves on the massive blowout preventer atop the damaged well, then two weeks later ice-like crystals clogged a 100-ton box the company tried placing over the leak. Earlier this week, engineers removed a mile-long siphon tube after it sucked up a disappointing 900,000 gallons of oil from the gusher.

Suttles said BP is already preparing for the next attempt to stop the leak that began after the Deepwater Horizon drilling rig exploded in April, killing 11 people.

The company plans to use robot submarines to cut off the damaged riser from which the oil is leaking, and then try to cap it with a containment valve. The effort is expected to take between four and seven days.

Gulf Oil Spill
This Wednesday evening, May 26, 2010 image made from video released by British Petroleum (BP PLC) shows equipment being used to try and plug a gushing oil well in the Gulf of Mexico. BP started pumping heavy mud into the leaking Gulf of Mexico well Wednesday and said everything was going as planned in the company's boldest attempt yet to plug the gusher that has spewed millions of gallons of oil over the last five weeks. SALES
AP Photo/BP PLC

"We're confident the job will work but obviously we can't guarantee success," Suttles said of the new plan, declining to handicap the likelihood it will work.

He said that cutting off the damaged riser isn't expected to cause the flow rate of leaking oil to increase significantly.

The permanent solution to the leak, a relief well currently being drilled, won't be ready until August, BP says.

Experts have said that a bend in the damaged riser likely was restricting the flow of oil somewhat, so slicing it off and installing a new containment valve is risky.

"If they can't get that valve on, things will get much worse," said Philip W. Johnson, an engineering professor at the University of Alabama.

Johnson said he thinks BP can succeed with the valve, but added: "It's a scary proposition."

Word that the top-kill had failed hit hard in the fishing community of Venice, La., near where oil first made landfall in large quanities almost two weeks ago.

Obama inspects oil booms
President Barack Obama, LaFourche Parish president Charlotte Randolph, right, and U.S. Coast Guard Admiral Thad Allen, National Incident Commander for the BP Deepwater Horizon oil spill, look at booms laid out to collect oil during a tour of areas impacted by the Gulf Coast oil spill, Friday, May 28, 2010 in Port Fourchon, La.
AP Photo/Evan Vucci

"Everybody's starting to realize this summer's lost. And our whole lifestyle might be lost," said Michael Ballay, the 59-year-old manager of the Cypress Cove Marina.

(Copyright 2010 by The Associated Press. All Rights Reserved.)