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2 139 315

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IPC

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Application

98105974/03, 1998-04-02

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Start date

1998-04-02

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Actual filing date

1998-04-02

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Published

1999-10-10

(72)

Inventor

Ostrjagin A.I.Pen'Kov A.I.Rastegaev B.A.Vakhrushev L.P.Koshelev V.N.Rekin A.S.

(73)

Holder

Ostrjagin Anatolij IvanovichPen'Kov Aleksandr IvanovichRastegaev Boris AleksandrovichVakhrushev Leonid PetrovichKoshelev Vladimir NikolaevichRekin Aleksandr Sergeevich

APPARENTLY VISCOUS DRILLING MUD Russian patent published in 1999 - IPC

Abstract RU 2139315 C1

FIELD: oil and gas production. SUBSTANCE: drilling mud containing (wt %) clay (2-20), water, and neutralization agent (0.1-0.5) additionally contains higher fatty acids (0.5-2.5) and water-soluble polyethylene oxide oligomers (1.0-10.0). Drilling mud may also contain polymers to reduce filtration and antifoaming agent. EFFECT: achieved marked apparently viscous properties. 3 cl, 1 tbl

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RU 2 139 315 C1

Authors

Ostrjagin A.I.

Pen'Kov A.I.

Rastegaev B.A.

Vakhrushev L.P.

Koshelev V.N.

Rekin A.S.

Dates

1999-10-10—Published

1998-04-02—Filed

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