Alexa

BP: No sign of leaks as capped well nears 48 hours

 Drilling rigs and workboats operate at the site of the Deepwater Horizon incident in the Gulf of Mexico Friday, July 16, 2010. The wellhead has been ...
 The Boa Sub C work boat, top, operates near the Q4000 drilling rig at the site of the Deepwater Horizon incident in the Gulf of Mexico Friday, July 1...
 Workboats operate near the Transocean Development Drilling Rig II at the site of the Deepwater Horizon incident in the Gulf of Mexico Friday, July 16...
 A workboat is surrounded by an oily slick at the site of the Deepwater Horizon incident in the Gulf of Mexico Friday, July 16, 2010. The wellhead has...
 Map shows the forecast location of oil
 Smoke rises from a controlled burn of contained oil from the Deepwater Horizon oil well leak on the Gulf of Mexico near the coast of Louisiana Friday...
 Vessels assisting in the capping of the Deepwater Horizon oil wellhead leak are seen past crew members on the Pacific Responder oil skimming vessel o...
 Oil cleanup workers use pressure washers as they clean up the beach on Grand Isle, La., Friday, July 16, 2010. The wellhead from the Deepwater Horizo...
 Ships pulling oil boom pass vessels assisting in the capping of the Deepwater Horizon oil wellhead on the Gulf of Mexico near the coast of Louisiana ...
 Vessels assisting in the capping of the Deepwater Horizon oil wellhead are seen on the Gulf of Mexico near the coast of Louisiana Friday, July 16, 20...
 Vessels assisting in the capping of the Deepwater Horizon oil wellhead are seen on the Gulf of Mexico near the coast of Louisiana Friday, July 16, 20...
 Medic Ron Nolan, bottom left, takes a picture of vessels assisting in the capping of the Deepwater Horizon oil wellhead from the Pacific Responder oi...
 A green sea turtle, rescued by NOAA sea turtle experts in the Gulf of Mexico, is to be transported to the Audubon Institute for rehabilitation, Venic...

APTOPIX Gulf Oil Spill

Drilling rigs and workboats operate at the site of the Deepwater Horizon incident in the Gulf of Mexico Friday, July 16, 2010. The wellhead has been ...

Gulf Oil Spill

The Boa Sub C work boat, top, operates near the Q4000 drilling rig at the site of the Deepwater Horizon incident in the Gulf of Mexico Friday, July 1...

Gulf Oil Spill

Workboats operate near the Transocean Development Drilling Rig II at the site of the Deepwater Horizon incident in the Gulf of Mexico Friday, July 16...

Gulf Oil Spill

A workboat is surrounded by an oily slick at the site of the Deepwater Horizon incident in the Gulf of Mexico Friday, July 16, 2010. The wellhead has...

GULF OIL SPILL

Map shows the forecast location of oil

Gulf Oil Spill

Smoke rises from a controlled burn of contained oil from the Deepwater Horizon oil well leak on the Gulf of Mexico near the coast of Louisiana Friday...

Gulf Oil Spill

Vessels assisting in the capping of the Deepwater Horizon oil wellhead leak are seen past crew members on the Pacific Responder oil skimming vessel o...

Gulf Oil Spill

Oil cleanup workers use pressure washers as they clean up the beach on Grand Isle, La., Friday, July 16, 2010. The wellhead from the Deepwater Horizo...

Gulf Oil Spill

Ships pulling oil boom pass vessels assisting in the capping of the Deepwater Horizon oil wellhead on the Gulf of Mexico near the coast of Louisiana ...

Gulf Oil Spill

Vessels assisting in the capping of the Deepwater Horizon oil wellhead are seen on the Gulf of Mexico near the coast of Louisiana Friday, July 16, 20...

Gulf Oil Spill

Vessels assisting in the capping of the Deepwater Horizon oil wellhead are seen on the Gulf of Mexico near the coast of Louisiana Friday, July 16, 20...

Gulf Oil Spill

Medic Ron Nolan, bottom left, takes a picture of vessels assisting in the capping of the Deepwater Horizon oil wellhead from the Pacific Responder oi...

Gulf Oil Spill

A green sea turtle, rescued by NOAA sea turtle experts in the Gulf of Mexico, is to be transported to the Audubon Institute for rehabilitation, Venic...

BP's experimental cap was holding Saturday as the final hours ticked away in a two-day trial run to make sure it keeps oil from pouring into the Gulf of Mexico without blowing a new leak in the busted well.
Kent Wells, a BP PLC vice president, said engineers glued to an array of pressure, temperature, sonar and other sensors were seeing no evidence of oil escaping into the water or the sea floor. Undersea robots were also patrolling the well site for signs of trouble.
A new breach underground was a major concern going into the test, because oil breaking out of pipes in the bedrock would be harder to control and could endanger plans for a permanent plug.
"We're feeling more comfortable," Wells said on a morning conference call, but cautioned: "The test is not over."
BP and the federal point man for the disaster, retired Coast Guard Adm. Thad Allen, have said they may decide to reopen the cap at least partly after the 48-hour test period ends Saturday around 3:30 p.m. EDT (1930 GMT), although it's not clear what conditions would prompt them to do so.
That call will be made by Allen, Wells said.
BP shut valves in the cap Thursday, stopping the flow of oil into the Gulf for the first time since the April 20 explosion on the BP-leased oil rig Deepwater Horizon killed 11 workers and unleashed the spill 5,000 feet (1,500 meters) below the sea.
With the cap working like a giant cork to keep the oil inside the well, scientists kept watch in case the buildup of pressure underground caused new leaks in the well pipe and in the surrounding bedrock that could make the disaster even worse.
Pressure readings after 41 hours were 6,745 pounds per square inch and rising slowly, Wells said, below the 7,500 psi that would have shown the well was not leaking. He said pressure continued to rise by around 2 psi per hour, compared to a range between 2 and 10 psi BP and the government provided late Friday. A low pressure reading, or a falling one, could mean the oil is escaping.
Undersea cameras showed some activity midday Saturday. The robots passed a wand-like object back and forth, and appeared to be unclogging a pipe by digging out dirt-like debris. Meanwhile, a glowing globe appeared on the seafloor as bubbles swirled around.
It wasn't immediately clear what the robots were doing, and to viewers, it was like watching a foreign movie without subtitles.
Wells said earlier Saturday that bubbles seen on video feeds from the well were common underwater, but said they would take samples to make sure they aren't gas escaping from the well.
The cap is designed to prevent oil from spilling into the Gulf, either by keeping it bottled up in the well or by capturing it and piping it to ships on the surface. It is not yet clear which way the cap will be used if it passes the pressure test.
Either way, the cap is a temporary measure until a relief well can be completed and mud and cement can be pumped into the broken well deep underground to seal it more securely than the cap.
BP is drilling two relief wells, one of them as a backup. Wells said work on the first one was far enough along that they expect to reach the broken well's casing, or pipes, deep underground by late this month. Then the job of jamming it with mud and cement could take "a number of days through a few weeks."
Even with the cap holding, no one has declared victory _ or failure. President Barack Obama on Friday cautioned the public "not to get too far ahead of ourselves," warning of the danger of new leaks "that could be even more catastrophic."
BP and government scientists at sea and in a faraway control room at BP's U.S. headquarters in Houston have been keeping a nerve-wracking vigil around the clock since the cap was shut.
One mysterious development was that the pressure readings were not rising as high as expected.
Allen said late Friday that two possible reasons were being debated by scientists: The reservoir that is the source of the oil could be running lower three months into the spill. Or there could be an undiscovered leak somewhere down in the well. Allen ordered further study but remained confident.
"This is generally good news," he said. But he cautioned, "We need to be careful not to do any harm or create a situation that cannot be reversed."
Even if the cap passes the test, more uncertainties lie ahead: Where will the oil already spilled go? How long will it take to clean up the coast? What will happen to the region's fishermen? And will life on the Gulf Coast ever be the same again?
There was no end in sight to the cleanup in the water and on shore. Somewhere between 94 million and 184 million gallons (356 million and 697 million liters) have spilled into the Gulf, according to government estimates.
Large sections of the Gulf Coast have been closed to fishing and shellfish harvesting. Many fishermen have been hired out by BP to do cleanup work.
While commercial fishing is still widely shut down, Louisiana reopened more than 80 percent of its waters for recreational fishing this week. On Saturday, anglers were out enjoying their restored freedom.
"It's a blessing," said Brittany Lawson, 22, a college student from River Ridge, Louisiana, as she fished off a pier with her boyfriend's family on Grand Isle. "I just hope it's not short-lived. I hope that the cleanup's really serious and that ... The cap holds and everything."
___
Weber reported from Houston. Associated Press Writers Allen Breed, Vicki Smith and Jay Reeves contributed to this report.


Updated : 2021-03-06 13:55 GMT+08:00