BP PLC's (BP, BP.LN) oil collection efforts dropped on Wednesday after spending much of the day reinstalling a containment cap on a leaking well in the Gulf of Mexico, the company said in a statement Thursday. BP collected 16,830 barrels of oil, down nearly 40% from the day before. Earlier on Wednesday, a robot submarine collided with the containment cap, jostling it loose and forcing the company to halt the flow of oil up to the Discoverer Enterprise rig on the surface
BP PLC's (BP, BP.LN) oil collection efforts dropped on Wednesday after spending much of the day reinstalling a containment cap on a leaking well in the Gulf of Mexico, the company said in a statement Thursday.

BP collected 16,830 barrels of oil, down nearly 40% from the day before. Earlier on Wednesday, a robot submarine collided with the containment cap, jostling it loose and forcing the company to halt the flow of oil up to the Discoverer Enterprise rig on the surface.

The containment cap, which can collect up to 18,000 barrels a day, was reinstalled on the well's blowout preventer at 7:30 p.m. EDT on Wednesday, the company said. Another vessel, the Q4000, continued to capture oil throughout the day at a rate of about 10,000 barrels a day. BP needs both containment systems working to meet its promise to the U.S. Coast Guard to collect 53,000 barrels a day by next week.

BP made that pledge as the company and the federal government have come under increasing political pressure to halt the flow of oil from the well, which has leaked since April. The spill was triggered when the Deepwater Horizon rig working on the well for BP caught fire and sank.

BP and the U.S. Coast Guard have raised estimates of the amount of oil gushing into the Gulf many times since the accident. BP's promised collection rate totals more than 50 times the initial estimate of the flow rate from the well.

The federal government estimates that anywhere from 35,000 to 60,000 barrels a day are escaping into the Gulf. Meanwhile, the Coast Guard is working with the oil industry on contingency plans in case more oil begins spilling from a new leak, or if a storm disrupts containment efforts on the surface.

Oil companies are considering a plan to divert oil to nearby platforms and pipelines, Coast Guard Admiral Thad Allen said Tuesday.

The first major storm since the Deepwater Horizon sank may reach the Gulf of Mexico as early as next week. The National Hurricane Center is tracking a tropical wave making its way through the Caribbean Sea, which the latest forecast gives a 40% chance of strengthening to become the first named storm of the 2010 hurricane season.

In Washington, officials are looking for ways to keep an offshore drilling ban in place after U.S. District Court Judge Martin Feldman overturned the six-month moratorium on Tuesday. Interior Secretary Ken Salazar outlined plans on Wednesday to implement a new ban that allows some drilling.

However, the department is now reviewing BP's Liberty project off the coast of Alaska. BP is drilling from a man-made island, allowing work to continue despite the offshore moratorium. "We want to keep the moratorium in place until we get to a level where we can provide a sense of safety to the American people that drilling can, in fact, continue," Salazar told the Senate Energy and Natural Resources Committee on Thursday. "How that will all come together is something that we're working on."