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2 153 518

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IPC

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Application

98120344/03, 1998-11-10

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Start date

1998-11-10

(22)

Actual filing date

1998-11-10

(45)

Published

2000-07-27

(72)

Inventor

Krylov G.V.Vjakhirev V.I.Verkhovskaja N.N.Kashkarov N.G.Usynin A.F.Shtol' V.F.Sorokin V.F.

(73)

Holder

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

DRILLING MUD Russian patent published in 2000 - IPC

Abstract RU 2153518 C1

FIELD: drilling fluids. SUBSTANCE: invention relates to aqueous drilling fluids applicable when uncovering beds with abnormally high formation pressure. Mud, containing water, filler, acrylic polymer (0.2-0.4%), and weighting agent prepared from titanium-magnetite ores (up to 150% above 100%), contains bentonite mud (3%) powder as filler and, additionally, complex reagent: carbolignosulfonate pitch (0.3-0.5%). EFFECT: increased productivity of well after uncovering of bed and increased density of environmentally safe drilling mud. 2 tbl

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RU 2 153 518 C1

Authors

Krylov G.V.

Vjakhirev V.I.

Verkhovskaja N.N.

Kashkarov N.G.

Usynin A.F.

Shtol' V.F.

Sorokin V.F.

Dates

2000-07-27—Published

1998-11-10—Filed