BP: Crews Lifting Key Device from Gulf Face Delay

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ON THE GULF OF MEXICO -- Icelike crystals had formed Saturday on the 300-ton blowout preventer that failed to stop oil from spewing into the Gulf of Mexico, forcing BP crews to wait before they could safely hoist the device to the surface.

The hydrates - which caused the oil giant problems when the company was trying to contain the oil spilling into the Gulf - need to melt because they are combustible. Crews must take care not to damage the device, which is considered a key piece of evidence in the spill investigation.

"We don't want to lift it and risk an uncontrolled release of gas because that's inherently dangerous," Darin Hilton, the captain of the Helix Q4000 vessel that's raising the device with a giant crane, told The Associated Press.

The AP was the only news outlet with a print reporter and photographer on board the ship.

The device would be lifted the final 500 feet to the surface once it was assured the hydrates had dissipated. It was not an unexpected delay, Hilton said. Before the stop, it had been painstakingly raised at a rate of about 450 feet to 500 feet per hour.

Marvin Morrison, BP's wellsite leader aboard the Q4000, said workers aren't just waiting for the hydrates to melt normally. Men in red jumpsuits and white hardhats could be seen on the deck using enormous wrench-like tools to turn dials on pipes that were dousing the blowout preventer with warm seawater to speed up the melting.

Hydrates form when gases such as methane mix with water under high pressure and cold temperatures. The crystals caused BP PLC problems in May, when the company tried to place a 100-ton, four-story dome over the leak to contain it.

One man on the deck in a white cage with glass windows is using a joystick to guide the crane holding the blowout preventer upward. It will ultimately be raised through a large hatch in the underbelly of the Q4000 up to the top deck, where it will then be placed on what is essentially a huge, metal holding device called a shipping skid.

The device likely wouldn't be hoisted onto the vessel until sometime Saturday evening.

There are 137 people aboard the ship, including FBI agents who are waiting to take possession of the device after its mile-long journey. It will eventually be taken to a NASA facility in Michoud, La., to be analyzed.

The 50-foot device was detached from the wellhead Friday afternoon. Another blowout preventer had successfully been placed on the blown-out well. Officials wanted a new blowout preventer to deal with any pressure that is caused when a relief well BP has been drilling intersects the blown-out well.

Once that intersection occurs sometime after Labor Day, BP is expected to use mud and cement to plug the blown-out well for good from the bottom.

The April 20 explosion aboard the Deepwater Horizon killed 11 workers and led to 206 million gallons of oil spewing from BP's undersea well.

Investigators know the explosion was triggered by a bubble of methane gas that escaped from the well and shot up the drill column, expanding quickly as it burst through several seals and barriers before igniting.

But they don't know exactly how or why the gas escaped. And they don't know why the blowout preventer didn't seal the well pipe at the sea bottom after the eruption, as it was supposed to. While the device didn't close - or may have closed partially - hearings have produced no clear picture of why it didn't plug the well.

Lawyers will be watching closely, as hundreds of lawsuits have been filed over the oil spill. Future liabilities faced by a number of corporations could be riding on what the analysis of the blowout preventer shows.

Copyright 2010 by The Associated Press.  All Rights Reserved.

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