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2 141 026

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Application

97111567/03, 1997-07-08

(22)

Actual filing date

1997-07-08

(45)

Published

1999-11-10

(72)

Inventor

Shcherbich N.E.Ippolitov V.V.Jankevich V.F.Frolov A.A.Ovchinnikov V.P.Karelina N.E.

(73)

Holder

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

LIGHTENED GROUTING MORTAR Russian patent published in 1999 - IPC

Abstract RU 2141026 C1

FIELD: grouting mortars applicable in cementing of casing strings of gas, gas condensate and oil wells complicated with presence of incoherent liable to hydraulic rupture rocks. SUBSTANCE: lightened grouting mortar contains ingredients in the following amounts, wt.%: grouting portland cement 53.75- 62.67; hollow glass microsphere 1.33-3.75; carboaluminate additive 1.25-2.67; gypsum 1.25-2.67; the balance, water or 4% solution of calcium chloride. EFFECT: expansion of cement stone within 0.1-0.3% with simultaneous decrease of density of grouting mortar to 1.42 g/cu.cm. 3 tbl

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RU 2 141 026 C1

Authors

Shcherbich N.E.

Ippolitov V.V.

Jankevich V.F.

Frolov A.A.

Ovchinnikov V.P.

Karelina N.E.

Dates

1999-11-10—Published

1997-07-08—Filed

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