Wall Street is throwing the most money at U.S. energy companies since at least 2000 amid growing confidence that the industry is emerging from the worst downturn in a generation. Energy firms raised $6.64 billion in 13 equity offerings in January, drawn in by a rich combination of oil prices consistently above $50 a barrel and a rush to drill that’s doubled the rigs in use in the U.S. and Canada since May. The biggest change from last year: oilfield servicers that provide the rigs, fracking equipment and sand used by drillers. The most beaten-down sector during a two-year price rout, servicers made up 22 percent of the equity totals in January, compared with 5 percent all last year. “The mood is absolutely different,” Trey Stolz, an analyst in New Orleans at the investment banking firm Coker & Palmer Inc., said by phone. “Go back to a year ago […]