NEW ORLEANS (AP) — Undersea robots begin working Saturday to remove the containment cap over the gushing BP well head in the Gulf of Mexico, the first part of a plan that could lead to diverting and capturing all leaking oil as soon as Monday.
Crews using remote-controlled submarines controlled by engineers a mile above on the Gulf’s surface plan to swap out the cap over the weekend, taking advantage of good weather following weeks of delays caused by choppy seas.
The cap now in use was installed June 4 to capture oil gushing from the bottom of sea, but because it had to be fitted over a jagged cut in the well pipe, some crude still escapes into the Gulf. The new cap — dubbed "Top Hat Number 10" — should fit more snugly and help BP catch all the oil.
Still, the leak will get worse before it gets better. When the cap is removed, oil will flow mostly unabated into the water for about 48 hours.
Even with the new cap, the BP well would still be busted and leaking — workers will funnel what comes out of it to tankers at the surface. The hope for a permanent solution remains with two relief wells intended to plug it completely far beneath the seafloor.
"I use the word ‘contained,’" said retired Coast Guard Adm. Thad Allen. "’Stop’ is when we put the plug in down below."
Containing the leak will not end the crisis that began when the Deepwater Horizon drilling platform exploded April 20, killing 11 workers and igniting the worst oil spill in the U.S.
The relief wells are still being drilled so they can inject heavy mud and cement into the leaking well to stop the flow, which is expected to be done by mid-August. Then a monumental cleanup and restoration project lies ahead.
BP worked Friday to hook up another containment ship called the Helix Producer to a different part of the leaking well. The ship, which will be capable of sucking up more than 1 million gallons a day when it is fully operating, should be working by Sunday, Allen said.
The government estimates 1.5 million to 2.5 million gallons of oil a day are spewing from the well, and the existing cap is collecting about 1 million gallons of that. With the new cap and the new containment vessel, the system will be capable of capturing 2.5 million to 3.4 million gallons — essentially all the leaking oil, officials said.
The plan had originally been to hook up the Helix Producer and install the new cap separately, but the favorable weather convinced officials the time was right for both operations.
"Everybody agrees we got the weather to do what we need," Allen said. He said the calm weather is expected to last seven to 10 days.
BP managing director Bob Dudley confirmed that the leak could be contained by Monday, but also included plans for another scenario, which includes possible problems for the installation of the cap that would push the work back until Thursday.
The past 80 days have seen the failure of one technique after another to stop the leak, from a huge containment box to a "top kill" and a "junk shot." The latest approach is not a sure thing either, warned Louisiana State University environmental sciences professor Ed Overton.
"Everything done at that site is very much harder than anyone expects," he said, adding that putting on the new cap carries new risks.
"Is replacing the cap going to do more damage than leaving it in place, or are you going to cause problems that you can’t take care of?" he asked.
Some people in Louisiana’s oil-soaked Plaquemines Parish were skeptical that BP can contain the oil so soon.
"Too many lies from the beginning. I don’t believe them anymore," oyster fisherman Goyo Zupanovich said at a marina in Empire, La.
