CALGARY, Alberta, Nov. 03, 2017 (GLOBE NEWSWIRE) — Essential Energy Services Ltd. (TSX:ESN) (“Essential”) was advised that the Federal Court of Canada (the “Court”) rendered its decision with regard to a patent infringement proceeding commenced in 2013 by Packers Plus Energy Services Inc. (“Packers Plus”) alleging that certain methods associated with the Tryton Multi-Stage Fracturing System infringe a patent issued to Packers Plus (the “Patent”).