HOUSTON (Reuters) - Patterson-UTI Energy, the contractor at the center of the deadliest U.S. drilling accident since the Deepwater Horizon rig explosion in 2010, has the second worst worker fatality rate among its peers, according to federal workplace safety data. Monday’s disaster, which killed five workers drilling a well in eastern Oklahoma, put a spotlight on safety in the shale industry amid President Donald Trump’s policy of boosting U.S. output of fossil fuels.