(Updates with new stocks, prices)
** U.S.-listed shares E&P companies, service providers anddrillers fall heavily as oil prices drop below $49 per barrel
** Brent at $47.74 per barrel, U.S. crude at$46.24 after Goldman Sachs slashed short-term price forecasts,Gulf producers showed no signs of curbing output
** Exxon Mobil down 1.8 pct, Chevron Corp down 1.4 pct, Royal Dutch Shell down 1.9 pct, Petrobras down 5.8 pct, ConocoPhillips down 2.7 pct
** Top losers include Basic Energy Services Inc down12 pct, Rex Energy Corp down 15 pct, BreitBurn EnergyPartners LP down 9.7 pct, Whiting Petroleum Corp down 10 pct, Sanchez Energy Corp down 8.8 pct
** Oilfield services companies also hit: Schlumberger Ltd down 4.8 pct, Halliburton Co down 3.3 pct, BakerHughes Inc down 2.3 pct, National-Oilwell Varco Inc down 5.3 pct
** Contract drillers fall: Seadrill Ltd down 4.9pct, Transocean Ltd down 4 pct, Diamond OffshoreDrilling Inc down 6 pct, Helmerich & Payne Inc down 3 pct, Nabors Industries Ltd down 5 pct, Rowan CoPlC down 4.3 pct, Ensco Plc down 3.6 pct