BP estimates in a worst-case scenario of the amount of oil leaking from its damaged well could be as high as 100,000 barrels per day.
That is far higher than US government projections of 60,000 barrels.
However BP claims the figures apply only if the blowout preventer is removed and there are no plans to do that.
100,000 barrels is said to be the equivalent of five Olympic swimming pools worth of oil spilling into the Gulf of Mexico daily at a cost now of 50 billion dollars.
BP continues to struggle to stop the leak that began with an explosion on a rig killing 11 people. It has subsequently caused an economic and environmental disaster along the US Gulf Coast across four states..
The amount of oil spurting from the well has been a matter of some controversy with critics saying BP has consistently understated the flow rate.