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2 021 319

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C1

(51)

IPC

(21) (22)

Application

5032480/03, 1992-02-19

(22)

Actual filing date

1992-02-19

(45)

Published

1994-10-15

(72)

Inventor

Shits L.A.Lipkes M.I.Timoshchuk Ju.D.

(73)

Holder

Vsesojuznyj Nauchno-Issledovatel'Skij Institut Burovoj Tekhniki

COMPOSITION FOR PREPARING CLAY-FREE DRILLING MUD Russian patent published in 1994 - IPC

Abstract RU 2021319 C1

FIELD: drilling of oil and gas wells. SUBSTANCE: the composition for preparing a clay-free drilling mud comprises (wt %): 80-99 condensed sulfite-alcoholic spent wash; 3-10 polydimethyl- diallylammonium chloride; and 5-12 hydroxyethylcellulose. EFFECT: improved properties of the composition. 3 tbl

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RU 2 021 319 C1

Authors

Shits L.A.

Lipkes M.I.

Timoshchuk Ju.D.

Dates

1994-10-15—Published

1992-02-19—Filed

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