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2 727 986

(13)

(51)

IPC

E21B43/22(2006-01-01)

C09K8/58(2006-01-01)

E21B43/16(2006-01-01)

(21) (22)

Application

2020105352, 2020-02-04

(24)

Start date

2020-02-04

(22)

Actual filing date

2020-02-04

(45)

Published

2020-07-28

(72)

Inventor

Voroshilov Aleksandr ValerevichKrivosheev Igor VasilevichMarinin Ivan AleksandrovichRumyantseva Elena Aleksandrovna

(73)

Holder

Voroshilov Aleksandr Valerevich

OIL DISPLACEMENT COMPOSITION Russian patent published in 2020 - IPC E21B43/22 C09K8/58 E21B43/16

Abstract RU 2727986 C1

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil industry, in particular, to compositions for oil displacement based on partially hydrolysed acrylamide polymers. Invention contains composition for oil displacement. Composition contains partially hydrolysed polyacrylamide and rheology modifier. Hydrophobic-hydrophilic modified polycarboxylate ester acts as rheology modifier. Weight ratio of components, %: partially hydrolyzed polyacrylamide – 90.0; modified polycarboxylate ether – 10.0.

EFFECT: higher rheological characteristics of oil-expelling composition at high shear stresses both in fresh and mineralized waters.

1 cl, 2 tbl

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RU 2 727 986 C1

Authors

Voroshilov Aleksandr Valerevich

Krivosheev Igor Vasilevich

Marinin Ivan Aleksandrovich

Rumyantseva Elena Aleksandrovna

Dates

2020-07-28—Published

2020-02-04—Filed