U.S. energy firms this week added rigs drilling for oil for the second time this year, energy services company Baker Hughes Inc said on Friday, after crude prices briefly tested a seven-month high over $50 a barrel over the past two weeks. That was a key price level that analysts and producers had said would likely trigger a return to the well pad. Drillers added 9 oil rigs in the week to June 3, bringing the total rig count up to 325, compared with 642 a year ago, Baker Hughes said in its closely followed report. The new rigs were scattered across many basins and states with the Permian in West Texas and New Mexico gaining five, while Alaska and Texas gained three each. Prior to this week, energy companies added only one rig so far this year, during the week of March 18. They had cut on average […]