(March 10, 2017, 2:43 PM EST) -- CHEYENNE, Wyo. — A company that provides field services for hydraulic fracturing operations on March 3 filed a brief in Wyoming federal court arguing that a drilling tools company with which it has a contract dispute should not be allowed to introduce as a witness the president of a nonparty vendor who did business with the field services company (Downhole Stabilization Rockies Inc. v. Reliable Field Services LLC, No. 15-226, D. Wyo.)....