Reuters: U.S. scientists on Thursday doubled their high-end estimate of the amount of crude oil flowing from BP Plc’s stricken Gulf of Mexico well. They said between 20,000 and 40,000 barrels (840,000 and 1.7 million gallons/3.2 million and 6.4 million liters) of oil flowed from the well before June 3, when BP’s remotely operated robots sawed through an underwater pipe to clear the way for a capping procedure. The cutting of the pipe likely increased the flow, but BP says it has …