Only time will tell

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.

This image made from video released by British Petroleum shows equipment being used to try and plug a gushing oil well in the Gulf of Mexico on Wednesday during a maneuver known as a “top kill” that has never before been tried 5

This image made from video released by British Petroleum shows equipment being used to try and plug a gushing oil well in the Gulf of Mexico on Wednesday during a maneuver known as a “top kill” that has never before been tried 5

COVINGTON, La. — 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.

BP hoped the mud could overpower the steady stream of oil, but chief executive Tony Hayward said it would be at least 24 hours before officials know whether the attempt has been successful. The company wants to eventually inject cement into the well to permanently seal it.

The stakes are high. Fisherman, hotel and restaurant owners, politicians and residents along the coast are fed up with BP’s so far ineffective attempts to stop the oil leak that sprang after an offshore drilling rig exploded April 20. Eleven workers were killed, and by the most conservative estimate, 7 million gallons (26 million litres) of crude have spilled into the Gulf, fouling Louisiana’s marshes and coating birds and other wildlife.

The top kill has worked above ground but has never before been tried 5,000 feet (1,500 metres) beneath the sea. Company officials peg its chance of success at 60 to 70 per cent.

President Barack Obama said “there’s no guarantees” it will work. The president planned a trip to Louisiana on Friday.

“We’re going to bring every resource necessary to put a stop to this thing,” he said.

Meanwhile, dozens of witness statements obtained by The Associated Press show a combination of equipment failure and a deference to the chain of command impeded the system that should have stopped the gusher before it became an environmental disaster. In a handwritten statement to the Coast Guard obtained by the AP, Transocean rig worker Truitt Crawford said: “I overheard upper management talking saying that BP was taking shortcuts by displacing the well with saltwater instead of mud without sealing the well with cement plugs, this is why it blew out.”

At a Coast Guard hearing in New Orleans, Doug Brown, chief rig mechanic aboard the platform, testified that the trouble began at a meeting hours before the blowout, with a “skirmish” between a BP official and rig workers who did not want to replace heavy drilling fluid in the well with saltwater.

The switch presumably would have allowed the company to remove the fluid and use it for another project, but the seawater would have provided less weight to counteract the surging pressure from the ocean depths.

Brown said the BP official, whom he identified only as the “company man,” overruled the drillers, declaring, “This is how it’s going to be.” Brown said the top Transocean official on the rig grumbled, “Well, I guess that’s what we have those pinchers for,” which he took to be a reference to devices on the blowout preventer, the five-story piece of equipment that can slam a well shut in an emergency.

A live video stream Wednesday showed pictures of the blowout preventer, as well as the oil gushing out. At other times, the feed showed mud spewing out, but BP said this was not cause for alarm.

A weak spot in the blowout preventer could blow under the pressure, causing a brand new leak.

Gene Beck, a petroleum engineering professor at Texas A&M in College Station, said the endeavour would likely fail quickly if the mud could not overcome the pressure of the oil.

“The longer it goes, maybe the better news that is,” Beck said.

Frustration with BP and the federal government has only grown since then as efforts to stop the leak have failed.

Louisiana Gov. Bobby Jindal and Plaquemines Parish President Billy Nungesser, both outspoken critics, led a boat tour around the oil-fouled delta near the mouth of the Mississippi River. The Coast Guard said Wednesday night that 100 miles (160 kilometres) of Louisiana coastline had been hit by the oil.

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