By Adam Wilmoth Energy Editor awilmoth@oklahoman.comChesapeake Energy Corp. on Wednesday reported a net loss to common shareholders of $40 million, or 4 cents a share, in the second quarter. Production surged in Wyoming's Powder River Basin, helping total production increase slightly from the year-ago period, Chesapeake executives said Wednesday morning. "Chesapeake continues to make significant progress in achieving our strategic priorities of reducing leverage, increasing margins and reaching cash flow neutrality," CEO Doug Lawler said in a statement.