U.S. oil drillers add rigs for third week in a row -Baker Hughes

June 17 (Reuters) - 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-week 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 leadi