Hundreds of thousands of gallons more oil gushed into the Gulf of Mexico on Wednesday after an undersea robot bumped a venting system and forced BP to remove the cap that had been containing some of the crude.
When the robot bumped the system, gas rose through the vent that carries warm water down to prevent ice-like crystals from forming, Coast Guard Adm. Thad Allen said.
A similar problem doomed the effort to put a bigger containment device over the gushing well in early May. The crystals called hydrates clogged the four-story box, threatening to make it float away, and BP had to abandon it on the ocean floor.
The smaller cap, which had worked fine until now, had been in place since early June. To get it there, though, crews had to slice away a section of the leaking pipe, meaning the flow of oil could be stronger than before.
The cap was removed just before 10 a.m. Wednesday and crews were checking to see if crystals had formed before putting it back on. Allen did not say how long that might take.
"There's more coming up than there had been, but it's not a totally unconstrained discharge," Allen said.
In the meantime, a different system was still burning oil on the surface.
Before the problem with the containment cap, it had collected about 700,000 gallons of oil in 24 hours. Another 438,000 gallons was burned.
The current worst-case estimate of what's spewing into the Gulf is about 2.5 million gallons a day. Anywhere from 67 million to 127 million gallons have spilled since the April 20 explosion on the Deepwater Horizon rig that killed 11 workers and blew out a well 5,000 feet underwater. BP PLC was leasing the rig from owner Transocean Ltd.
Meanwhile, the Obama administration tried to sort out how to resurrect a six-month moratorium on new deepwater drilling struck down by a federal judge a day earlier.
U.S. District Judge Martin Feldman in New Orleans overturned the ban Tuesday, saying the government simply assumed that because one rig exploded, the others pose an imminent danger, too.
Feldman, a 1983 appointee of President Ronald Reagan, has reported extensive investments in the oil and gas industry, including owning less than $15,000 of Transocean stock, according to financial disclosure reports for 2008, the most recent available. He did not return calls for comment.
The White House promised an immediate appeal of his decision. The Interior Department had imposed the moratorium last month in the wake of the BP disaster, halting approval of any new permits for deepwater projects and suspending drilling on 33 exploratory wells.
Interior Secretary Ken Salazar said in a statement late Tuesday that within the next few days he would issue a new order imposing a moratorium that eliminates any doubt it is needed and appropriate.
"It's important that we don't move forward with new drilling until we know it can be done in a safe way," Salazar told a Senate subcommittee Wednesday.
BP's new point man for the oil spill wouldn't say Wednesday if the company would resume deepwater drilling in the Gulf of Mexico.
Asked about it Wednesday on NBC's "Today" show, BP managing director Bob Dudley said they will "step back" from the issue while they investigate the rig explosion.
Also Wednesday, BP said Dudley has been appointed to head the new Gulf Coast Restoration Organization, which is in charge of cleaning up the oil spill.
At least two major oil companies, Shell and Marathon, said they would wait to see how the appeals play out before resuming drilling.
The lawsuit was filed by Hornbeck Offshore Services of Covington, La. CEO Todd Hornbeck said after the ruling that he is looking forward to getting back to work. "It's the right thing for not only the industry but the country," he said.
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