(September 14, 2015, 7:20 AM EDT) -- COLUMBUS, Ohio — A hydraulic fracturing company engaged in a dispute with a drilling company related to their respective liabilities in an underlying groundwater contamination lawsuit on Sept. 1 filed a brief in Ohio federal court opposing the drilling company’s motion to enforce a judgment (Warren Drilling Company v. Equitable Production Company, No. 12-00425, S.D. Ohio)....