Energy stocks stumble, but drillers rise By: MarketWatch March 29, 2011 at 10:17 AM EDT Halliburton signals increased activity in Saudi Arabia, giving impetus for shares in the oil-services segment to gain further. Read More >> Related Stocks: Anadarko Petroleum Cameron International Devon Energy Enterprise Products Partners LP Halliburton Co Pioneer Natural Resources Royal Dutch Shell Cl B ADR Royal Dutch Shell Plc ADR Schlumberger Ltd Standard & Poors 500 Transocean Ltd