(March 6, 2020, 7:28 AM EST) -- HOUSTON — The chief financial officer for a hydraulic fracturing company on March 2 filed a declaration in federal bankruptcy court in Texas explaining that the company filed for Chapter 11 bankruptcy due to “a significant and sustained drop in oil and gas prices,” which are dependent on factors beyond the company’s control (In re: Pioneer Energy Services Corp., et al., No. 20-31425, S.D. Texas Bkcy.)....