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2 105 782

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Application

96106807/03, 1996-04-09

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Actual filing date

1996-04-09

(45)

Published

1998-02-27

(72)

Inventor

Kashkarov N.G.Verkhovskaja N.N.Jushkova N.E.Kozubovskij A.I.Vjakhirev V.I.Usynin A.F.

(73)

Holder

Tjumenskij Nauchno-Issledovatel'Skij I Proektnyj Institut Prirodnogo Gaza I Gazovykh Tekhnologij

DRILLING MUD Russian patent published in 1998 - IPC

Abstract RU 2105782 C1

FIELD: drilling wells. SUBSTANCE: WATER-BASED drilling mud used when opening up formation contains, wt. -%: special type of acrylic polymer, 0.30-0.35; sodium tripolyphosphate, 0.50-0.70; and, additionally, hydrolysis lignin, 5-7; and weighting agent, 23.2- 21.3. EFFECT: improved performance characteristics. 2 tbl

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RU 2 105 782 C1

Authors

Kashkarov N.G.

Verkhovskaja N.N.

Jushkova N.E.

Kozubovskij A.I.

Vjakhirev V.I.

Usynin A.F.

Dates

1998-02-27—Published

1996-04-09—Filed

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