U.S. oil drillers pull 13 rigs, biggest drop in 4 weeks -Baker Hughes
May 29, 2015 at 13:42 PM EDT
May 29 (Reuters) - Energy firms pulled another 13 rigs from U.S. oil fields this week, the biggest drop in four weeks, data showed on Friday, showing that a near six-month slump in activity had yet to run its course despite a rebound in crude oil prices.