U.S. drillers this week added oil rigs for a third week in a row for the first time since August, according to a closely followed report on Friday, as producers seek more drilling permits after crude prices hit an 11-month high over $51 a barrel last week. Despite a decline in U.S. crude futures to one-month lows to under $47 this week, analysts and producers have said oil over $50 was a key level that would trigger a return to the well pad and drilling permits are a leading indicator of future drilling. Drillers added nine oil rigs in the week to June 17, bringing the total rig count up to 337, compared with 631 a year ago, energy services firm Baker Hughes Inc said. Before this week, drillers added rigs in only three out of 23 weeks this year, cutting on average nine oil […]