U.S. oil producers added 21 oil rigs in the past week, the most in over a year, data showed on Friday, suggesting that drillers were moving more aggressively than expected, just before crude prices’ latest dive down. Oil producers, who cut rigs in the face of falling prices late last year, began to add rigs back in the week ending July 2, oil services company Baker Hughes Inc said in its closely followed report. The latest addition comes amid a 21 percent collapse in U.S. crude prices from a recent high in June, data showed on Friday. The rise in the rig count this week was the biggest increase since April 2014. It was, however, only the third addition over the past 33 weeks, bringing the total rig count […]