CAPSULAR DESTRUCTOR BASED ON AMMONIUM PERSULPHATE FOR OIL DEGELLING FLUIDS OF OIL WELLS AFTER HYDRAULIC FRACTURING OF THE FORMATION AND METHOD OF ITS PRODUCTION Russian patent published in 2019 - IPC C09K8/52 C09K8/536 C09K8/92 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil and gas production, in particular to process compositions used to increase productive formation permeability by means of formation hydraulic fracturing, and more specifically to encapsulated destructors used to breakdown (thicken) thickened liquid-gels after formation hydraulic fracturing, and to a method of obtaining such destructors, and, in particular, can be used in oil and gas production. Method of producing encapsulated destructor for oil fluids of oil wells after formation hydraulic fracturing involves mixing powdered ammonium persulphate powder with powdered calcium sulphate at their ratio of 0.7–1.5:1.0, granulation of the obtained mixture when sprayed as binder water in amount of 0.1 to 0.4 with respect to the weight of calcium sulphate, drying the obtained granules at temperature of 30–40 °C, formation of a protective coating on granules by successively alternating spraying processes of an aqueous solution of methacrylic and acrylic acid copolymers and powder of calcium carbonate or sodium-montmorelonite in amount of 1–2 % of weight of granules and process of granules drying to obtain coating, which is 15–25 % of weight of granules. Encapsulated destructor for oil fluids of oil wells after hydraulic fracturing of the formation obtained by said method.

EFFECT: elimination of chemical and fire-explosion hazard, provision of wastelessness and environmental safety of the destructor obtaining process with preservation of its operational properties.

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