( October 3, 2019, 1:53 PM EDT) -- MIDLAND, Texas — Two hydraulic fracturing services companies on Sept. 30 sued a competitor that provides similar fracking services, contending that it is liable for patent infringement and misappropriation of trade secrets (Coil Chem LLC, et al. v. Durachem Production Company, et al., No. 19-225, W.D. Texas)....