FRICTION-REDUCING COMPOSITIONS CONTAINING HIGH-CONCENTRATION SALINE SOLUTION Russian patent published in 2020 - IPC C10M111/04 C10M169/04 C10M149/04 C09K8/12 C09K8/58 C09K8/584 C10N30/02 C08F20/56 C08F20/06 

FIELD: chemistry.

SUBSTANCE: present invention describes a friction-reducing composition comprising a reverse polymer emulsion and a highly concentrated solution of salts, wherein weight ratio of highly concentrated solution of salts and reverse polymer emulsion is from 0.5:1 to 10:1, and high-concentration solution of salts has concentration higher than or equal to 65 % of concentration of saturated solution of salts, wherein the inverse polymer emulsion contains a friction-reducing polymer and a viscosity modifier, where the viscosity modifier contains an organic solvent, and wherein the organic solvent is Vaseline oil, kerosene, diesel, heavy naphtha, animal fat, animal oil, vegetable fat, vegetable oil, limonene, turpentine, a surfactant or a combination thereof, wherein composition contains 10 to 40 wt % of a reverse polymer emulsion containing a friction-reducing polymer, from 5 to 20 wt % of viscosity modifier and from 40 to 85 wt % of highly concentrated solution of salts. Also described is a method and use of an effective amount of a friction-reducing composition for reducing friction of fluid flowing through a pipe, where liquid is an aqueous fluid for hydraulic fracturing, used on oil deposit.

EFFECT: disclosed are friction-reducing compositions containing high-concentration saline solution.

18 cl, 3 dwg, 2 tbl, 3 ex