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2 637 224

(13)

(51)

IPC

C08B31/18(2006-01-01)

C09K8/08(2006-01-01)

C08B31/16(2006-01-01)

(21) (22)

Application

2016141367, 2016-10-21

(24)

Start date

2016-10-21

(22)

Actual filing date

2016-10-21

(45)

Published

2017-12-01

(72)

Inventor

Martynova Darya OlegovnaYanovskij Vyacheslav AleksandrovichChurkin Ruslan AleksandrovichMinaev Konstantin MadestovichZakharov Aleksej SergeevichFakhrislamova Regina SalavatovnaAndropov Mikhail OlegovichSagitov Rashid Ravilevich

(73)

Holder

Federalnoe Gosudarstvennoe Avtonomnoe Obrazovatelnoe Uchrezhdenie Vysshego Obrazovaniya Natsionalnyj Issledovatelskij Tomskij Gosudarstvennyj Universitet Ni Tgu)

METHOD FOR PRODUCING MODIFIED STARCH REAGENT Russian patent published in 2017 - IPC C08B31/18 C09K8/08 C08B31/16

Abstract RU 2637224 C1

FIELD: oil and gas industry.

SUBSTANCE: method involves suspending starch in organic solvent - aliphatic alcohols C₁-C₅ or their mixtures; treating with aqueous solution of sodium hydroxide; treatment with carboxymethylation agent - monochloroacetic acid or sodium monochloroacetate followed by squeezing and drying, after treatment with aqueous sodium hydroxide solution, starch is treated with cross-linking agent from: formalin, paraformaldehyde, urotropin, ethanal, glyoxal, and after squeezing is washed with water solution of ethanol with the concentration from 40 to 80 wt %. Carboxymethylated and cross-linking agents can be used as solutions in aliphatic alcohols C₁-C₅.

EFFECT: high consumer properties when used in drilling mud compositions.

4 cl, 1 tbl, 5 ex

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RU 2 637 224 C1

Authors

Martynova Darya Olegovna

Yanovskij Vyacheslav Aleksandrovich

Churkin Ruslan Aleksandrovich

Minaev Konstantin Madestovich

Zakharov Aleksej Sergeevich

Fakhrislamova Regina Salavatovna

Andropov Mikhail Olegovich

Sagitov Rashid Ravilevich

Dates

2017-12-01—Published

2016-10-21—Filed