(February 7, 2017, 12:45 PM EST) -- WILMINGTON, Del. — A company that provides sand for energy companies that conduct hydraulic fracturing operations on Jan. 9 filed for Chapter 11 bankruptcy in the U.S. Bankruptcy Court for the District of Delaware, citing debts between $50 million and $100 million due to what it calls a petroleum recession that resulted in a decreased demand for fracking sand (In re: Chieftain Sand and Proppant LLC, et al., No. 17-10064, Del. Bkcy.)....