Vault in place to cap US oil spill

BP's containment device aims to stop crude gushing from oil well in Gulf of Mexico.

    The four-storey contraption was successfully lowered to the seabed to cap the gushing crude [Reuters]

    Four-storey device

    The company said it does not expect the container to be fully operational until at least Sunday or Monday.

    "It appears to be going exactly as we hoped," Bill Salvin, a BP spokesman, told The Associated Press news agency on Friday afternoon, shortly after the four-storey device hit the seafloor.

    IN DEPTH

    "Still lots of challenges ahead, but this is very good progress.

    "We are essentially taking a four-storey building and lowering it 1,500 metres and setting it on the head of a pin."

    While similar devices have been used in the past, they have never been tested at such a depth, and it was not clear whether it would function properly.

    The device is designed as a stop-gap measure to cap the leak in one of three places while crews continue to drill a relief well to ease the pressure off the blown-out well at the site, but that could take up to three months to complete.

    The rest of the oil is coming from the blowout preventer at the well, a heavy piece of machinery designed to prevent such a leak.

    Wreckage of rig

    The lowering of the containment box - which will be able to capture up to 85 per cent of the leaking oil - played out slowly 80km off the coast of Louisiana.

    About 400 metres away is the wreckage of the drilling rig Deepwater Horizon, which BP was leasing when it exploded on April 20, blowing open the well and triggering a major environmental crisis.

    Eleven workers were killed in the accident at the platform, which sank two days later.

    in depth

      BP defends clean-up effort
      Spill threatens wildlife
      Blog: 'They saw it coming!'
       Blog: Economic impact
      Videos:
      US battles to protect coast
      Obama pledges action
      US oil spill explained
      Fears grow over oil disaster
      Oil spill threatens coastline
      US fights Gulf oil spill
      How the spill happened
      Counting the cost:
      Oil exploration

    An estimated 800,000 litres of oil have been spewing daily ever since, in the biggest oil spill in the US since the Exxon Valdez disaster in Alaska in 1989.

    So far about 11 million litres of crude have spilled to sea, sending oil slicks toward a shoreline of marshes, shipping channels, fishing grounds and beaches in four US states.

    The operation to contain the spill came as oil sheen was seen spilling on islands off the coast of the southern US state of Louisiana, the US coast guard said.

    The move to cap the leak took on an added urgency as oil reached several barrier islands off the Louisiana coast, many of them fragile animal habitats.

    "Teams have confirmed oil on Freemason Island," Petty Officer Connie Terrell of the US coast guard said on Thursday.

    "It is at the south end of the Chandeleur Islands. It is largely sheen with no evidence of medium or heavy oil."

    Oil sheen is the shimmering thin layer of crude settled on top of water.

    Several birds were spotted diving into the oily, pinkish-brown water, and dead jellyfish washed up on the uninhabited islands.

    Huge oil slick

    Meanwhile, a huge oil slick is floating in the Gulf, and residents of Louisiana, Mississippi, Alabama and Florida are anxiously waiting for landfall.

    Seas were calm on Friday, and the US Coast Guard hoped to continue skimming oil from the ocean surface, burning it at sea and dropping dispersants from the air to break it up.

    Race to stop oil flow

    Engineers struggling to find a way to halt the flow of oil from the damaged well are working along three paths:

     Breaking up oil as it emerges from damaged pipes by injecting chemicals into waters near wellhead - early tests show some success, but does nothing to stop flow

     Lowering a 12-metre-high, 98-tonne dome to sea floor where it is hoped it will contain gushing oil and allow it to be pumped to surface and into tankers - never been tried in such deep water

     Drilling two relief wells several miles into ocean floor, where oil could be diverted – could take three months

    John Curry, BP's spokesman, said that three emergency response teams were sent to the island, some 50km offshore, and were deploying inflatable booms to try to protect the prime marsh and wildlife area.

    "This is the first confirmation of shoreline impact we have had," he said.

    "We are doing everything we can to make sure a major impact doesn't happen."

    The Chandeleur Islands form the easternmost point of Louisiana and are part of the Breton National Wildlife Refuge - the second oldest refuge in the US and home to countless endangered shorebirds.

    Al Jazeera's Cath Turner, reporting from the Gulf of Mexico, said that water off the Mississippi coastline was now pinkish-reddish in colour, having been stained by oil and dispersant.

    "The mostly fine weather has helped authorities contain the spill, but there's no telling how long that will last," Turner said.

    She said that she had seen casualties of the oil- a bird that had been drifting in the slick for some time and was so weak that it could barely move.

    "Its feathers were slippery with oil sheen ... it didn't have long to live."

    SOURCE: Al Jazeera and agencies


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