U.S. energy companies added oil rigs for a 13th week in the last 14, extending a nine-month recovery as drillers take advantage of crude prices that have held mostly over $50 a barrel since OPEC agreed to cut supplies in late November. Drillers added 17 oil rigs in the week to Feb. 3, bringing the total count up to 583, the most since October 2015, energy services firm Baker Hughes Inc said on Friday. During the same week a year ago, there were 467 active oil rigs. Since crude prices first topped $50 a barrel in May after recovering from 13-year lows last February, drillers have added a total of 267 oil rigs in 32 of the past 36 weeks, the biggest recovery in rigs since a global oil […]