METHOD OF PRODUCING CERAMIC PROPPANTS Russian patent published in 2014 - IPC C09K8/80 

FIELD: oil and gas industry.

SUBSTANCE: invention refers to oil and gas industry, and namely to the manufacturing procedure of ceramic proppants intended to be used as propping agents at production of oil or gas using the formation hydraulic fracturing method (FHF). According to the manufacturing procedure of ceramic proppants that includes pretreatment of feed stock, milling and formation of granules (granulation), drying and sintering of granules, treatment of their surface with reagent; at milling stage a special water-insoluble sintering agent is added to the feed stock and at granulation stage a cellulating agent containing a water-soluble mineral acid salt is diluted in the granulation liquid; sintering agent and cellulating agent have the following ratio in % in excess of the feed stock weight: cellulating agent - 0.1-1.5, sintering agent - 0.1-2.0, and the above treatment is made by capillary imbibition of the granules porous shell with the solution.

EFFECT: simplifying production technology for proppants surface-treated with agent in order to improve their strength.

2 cl, 1 tbl, 6 dwg, 1 ex