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RU

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2 224 779

(13)

C2

(51)

IPC

(21) (22)

Application

2001130049/03, 2000-03-31

(24)

Start date

2000-03-31

(22)

Actual filing date

2000-03-31

(45)

Published

2004-02-27

(72)

Inventor

Uorren BrentVan Der Khorst Peter M.Van`T Zelfde Teodorus A.

(73)

Holder

Aktso Nobel' N.V.

HYDROGEN-CONTAINING DRILLING FLUID COMPOSITION Russian patent published in 2004 - IPC

Abstract RU 2224779 C2

FIELD: drilling fluids. SUBSTANCE: invention provides water-based drilling fluids containing at least one viscosity-raising component and at least one rheology-controlling agent, the latter being amphoteric polymer with quaternary ammonium cation groups. EFFECT: improved rheological properties of fluid. 9 cl, 3 tbl, 2 ex

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RU 2 224 779 C2

Authors

Uorren Brent

Van Der Khorst Peter M.

Van`T Zelfde Teodorus A.

Dates

2004-02-27—Published

2000-03-31—Filed

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