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2 127 294

(13)

(51)

IPC

(21) (22)

Application

97117265/03, 1997-10-28

(22)

Actual filing date

1997-10-28

(45)

Published

1999-03-10

(72)

Inventor

Bazarnova N.G.Galochkin A.I.Markin V.I.Tokareva I.V.Gorulev O.A.Blonskij A.G.Chubik P.S.Godunov E.B.

(73)

Holder

Altajskij Gosudarstvennyj Universitet

CARBOXYMETHYLATED CHEMICAL REAGENT FOR DRILLING FLUIDS Russian patent published in 1999 - IPC

Abstract RU 2127294 C1

FIELD: drilling of wells in petroleum refining and gas industries. SUBSTANCE: carboxymethylated lignocarbohydrate chemical reagent for drilling fluids is used in drilling fluids to regulate their properties. Carboxymethylated lignocarbohydrate chemical reagent comprises (wt %): 27-38 carboxymethylated cellulose; 15- 23 carboxymethylated lignin; 15-22 hemicellulose; 3-7 unsubstituted cellulose, lignin, hemicelluloses; 21-25 sodium chloride; 18.5-33.5 total content of carboxymethyl groups in the resulting carboxymethylated lignocarbohydrate chemical reagent. EFFECT: regulation of properties of drilling fluids and lower cost. 2 tbl

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RU 2 127 294 C1

Authors

Bazarnova N.G.

Galochkin A.I.

Markin V.I.

Tokareva I.V.

Gorulev O.A.

Blonskij A.G.

Chubik P.S.

Godunov E.B.

Dates

1999-03-10—Published

1997-10-28—Filed