Sanctions, what sanctions? Exxon Mobil Corp. will start drilling a $700 million well in the Arctic Ocean tomorrow, Russia’s government said, showing that for all the talk of action against Vladimir Putin ’s oil industry, the largest U.S. energy company is undeterred. As Russia’s relations with Europe and the U.S. deteriorated to the lowest point since the Cold war over the conflict in Ukraine, the European Union imposed a third round of sanctions last week, restricting the export of equipment used for offshore oil production. That doesn’t affect Exxon’s plans because the contract to hire the rig was signed before the measures were announced. Developing the Arctic is vital for Russia, where energy provides half the state’s revenue, to maintain oil production near a post-Soviet high of more than 10 million barrels a day. For Exxon, where output fell to a five-year low in the second quarter, a discovery […]