LONDON (Reuters) - Oil prices fell on Tuesday after reports of swelling inventories and forecasts of record U.S. and Russian output combined with a sharp sell-off in stock markets as the outlook for global growth deteriorated.U.S. crude oil dropped $2.04, or 4.1 percent, to a low of $47.84, its weakest since September 2017. It recovered to around $49.28, down 60 cents, by 1420 GMT.North Sea Brent lost $2.41, or 4.0 percent, to $57.20, a 14-month low. Brent last traded around $59.01, also 60..