The U.S. shale patch is facing a shakeout as drillers struggle to keep pace with the relentless spending needed to get oil and gas out of the ground. Shale debt has almost doubled over the last four years while revenue has gained just 5.6 percent, according to a Bloomberg News analysis of 61 shale drillers. A dozen of those wildcatters are spending at least 10 percent of their sales on interest compared with Exxon Mobil Corp.’s 0.1 percent. “The list of companies that are financially stressed is considerable,” said Benjamin Dell, managing partner of Kimmeridge Energy, a New York-based alternative asset manager focused on energy. “Not everyone is going to survive. We’ve seen it before.” Some investors are already bailing out. On May 23, Loews Corp. (L) , the holding company run by New York ’s Tisch family, said it is weighing the sale of HighMount Exploration & Production […]