British Petroleum's top kill failed to seal oil gusher

British Petroleum has failed to close the oil gushes into the Gulf of Mexico after three days of trying the so-called top kill labors, said BP Chief in service Officer Doug Suttle.

The growing environmental disaster - the largest marine oil spill in U.S. history - in its 40th day Saturday even as BP fought to hold the flow of crude oil from the crack well head.

"We have been able to conquer the pressure in the well," Suttle said Saturday in the 'top kill effort to close the stream. "We have made many attempts."

Over the past three days, forced BP engineers constructed 30,000 barrels of heavy mud into the well, and also fired rubber substance into the wellhead, but to no avail.

Suttle said BP will now move to "lower maritime riser package" or LMRP, technique, which officials hope will be operating within four to seven days. This is a variation of the current lock and would deprive thank the riser pipe at the well head, and cover it with a new repression dome to capture more of the flow, and enjoy it to the surface.

The current evacuation operation, which only captures a fraction of the leaking oil, connects the end of the long riser pipe which now snakes along the seabed. It was torn from the drilling rig Deepwater Horizon in the April 20 explosion.

Suttle said that BP has collected 22 000 barrels of oil from existing siphon operations, and hoped that the new siphon would work better.

"We believe that the LMRP must take most of the power. I cannot give an exact value," Suttle said.

U.S. officials have increased estimates of oil leaked from the 5,000 barrels per day to up to 20,000 barrels, making good bride the most disastrous American naval oil disaster worse than the 1989 Exxon Valdez off Alaska.

Oil has slather 160 km of the Gulf Coast and flooded 12 hectares of fragile marshes, according to U.S. Coast Guard Rear Admiral Mary Landry. Hundreds of pelicans and other seabirds covered in oil in the middle of the critical nesting season. Fragile marsh areas, the kindergarten for a large part of the Gulf's marine life and water birds are also dying.

The well split after the explosion that sank Deepwater Horizon rig, killing 11 people.