REAGENT FOR TREATING PROCESS FLUIDS USED IN OIL-PRODUCTION INDUSTRY, AND METHOD OF PREPARATION THEREOF Russian patent published in 2002 - IPC

FIELD: oil and gas production. SUBSTANCE: invention provides multifunctional reagent for treating both fresh and mineralized fluids (drilling muds, oil-production intensification fluids, insulation formulation, etc.) used under a variety of hydrogeological conditions, including operations under multisalt mineralization conditions, and which can also be used as lubrication, inhibitory, and waterproofing additives for process fluids. Reagent contains 32.2-48.8 wt % of non-saponified bottom residues from synthetic fatty acids production (acid number 70-100 mg KOH/g, ester number 35- 45 mg KOH/g), potassium hydroxide (3.8-5.7 wt %) aqueous solution, additionally 4.5-9.0 wt % of oxyethylated (at least 9 ethyl oxide groups) monoalkylphenol based on propylene trimers, and water - the balance. Preparation procedure: bottom residues are first mixed with alkali solution under boiling conditions, after which mixture is cooled to 50-60 C and above-named surfactant is added. EFFECT: increased stability of reagent and process fluids containing the latter with regard to multisalt mineralization. 3 cl, 3 tbl