It accomplishes wax removal by using a train of Hydrochloric acid in front of the pig and Anhydrous Ammonia behind the pig,and a further slug of Xylene at the rear of the train to pacify any corrosive effects and prevent crystallization. Except for the Jet Stream pig separating the Hydrochloric acid and Anhydrous Ammonia the rest of the train is contained by batching pigs. When the pig's travel is impeded by a wax build-up, the pressure across the pig increases, a valve inside the pig will open allowing the anhyrous ammonia to be jetted, through holes in the nose cone, into the acid at the wall of the pipe. The resultant thermal reaction of the mixing of the two chemicals, melts the wax, and the flow keeps any particles of wax in suspension. The residual of the chemicals at the end of the run will be Nitrogen and Brine which can easily be desposed.
Further details are available upon request.