Reuters | Oil slips, as investors fret about rising US drilling Reuters LONDON Oil prices dipped on Monday, reversing earlier gains as concerns about a pick up in U.S. drilling activity trumped expectations that OPEC will extend output cuts till the end of 2017. "It's a still game of very narrow trading ranges between ... Oil dives, sending US crude below $USUS50 This OPEC Country Has the Largest Proven Oil Reserves (and It's Not Saudi Arabia) Oil ends below $50 as US rig count continues to climb |