For U.S. oilfield services companies suffering the worst revenue slump in decades it would at first seem like a lifeline: The lifting of sanctions on Iran by six world powers reopened the door for their foreign units to return to the OPEC member that needs help to develop its oil reserves. Iran, home to the world’s fourth largest crude reserves, is embarking on a $185 billion effort to revive oil and gas projects by 2020 after sanctions halved the country’s oil exports and led to neglect of its energy infrastructure. A drop in crude oil prices to 13-year lows has brought drilling come almost to a standstill nearly everywhere else in the world, creating rare commercial prospects for non-U.S. companies such as Saipem, an oilfield subsidiary of […]