U.S. energy firms added oil and natural gas rigs for a second week in a row as higher oil prices prompted some drillers to return to the wellpad. The oil and gas rig count, an early indicator of future output, rose eight to 448 in the week to May 7, its highest since April 2020, energy services firm Baker Hughes Co said in its closely followed report on Friday. That put the total rig count 74 rigs, or 20%, higher than this time last year. It was also up 84% since falling to a record low of 244 in August 2020, according to Baker Hughes