The backdropThe energy sector has had the second most bankruptcies so far this year, according to Bloomberg data. Once one of the top providers of oil-well drilling and completion, Weatherford International Plc announced last week that it was preparing to file for bankruptcy. Halcon Resources Corp. and Alta Mesa Resources Inc. have raised doubts about their ability to stay afloat amid investor demands for returns rather than pouring more money into capital expenditures. Many U.S. shale producers have had to scale back growth and make big changes to cut operating costs.