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2 255 205

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Application

2004106098/03, 2004-03-01

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Start date

2004-03-01

(22)

Actual filing date

2004-03-01

(45)

Published

2005-06-27

(72)

Inventor

Krylov G.V.Shcherbich N.E.Belej I.I.Karelina N.E.Konovalov E.A.Ermakov A.A.Tsypkin E.B.Konovalov V.S.

(73)

Holder

Obshchestvo S Ogranichennoj Otvetstvennost'Ju

LIGHT-WEIGHT PLUGGING MIX Russian patent published in 2005 - IPC

Abstract RU 2255205 C1

FIELD: oil and gas production.

SUBSTANCE: object of invention is cementation of casing pipes of gas, gas condensate, and oil wells complicated by presence of weakly bound rocks with trend to hydraulic fracturing. Light-weight plugging mix contains, wt %: oil-well Portland cement 72.7-81.0, aluminosilicate microspheres (light-weight additive) 11.7-14.6, unconsolidated condensed microsilica (filtration inhibitor) 4,9-9.7, and granulated calcium chloride.

EFFECT: reduced filtration velocity.

1 tbl

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RU 2 255 205 C1

Authors

Krylov G.V.

Shcherbich N.E.

Belej I.I.

Karelina N.E.

Konovalov E.A.

Ermakov A.A.

Tsypkin E.B.

Konovalov V.S.

Dates

2005-06-27—Published

2004-03-01—Filed