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IPC

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Application

99104640/03, 1999-03-09

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Start date

1999-03-09

(22)

Actual filing date

1999-03-09

(45)

Published

2000-06-20

(72)

Inventor

Shcherbich N.E.Shtol' V.F.Ippolitov V.V.Karmatskikh S.A.Karelina N.E.Jankevich V.F.Frolov A.A.

(73)

Holder

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

LIGHT GROUTING MORTAR Russian patent published in 2000 - IPC

Abstract RU 2151271 C1

FIELD: oil and gas production. SUBSTANCE: invention relates to grouting mortars used when cementing casing string in gas, gas condensate, and oil boreholes complicated by the presence of weakly bound rocks prone to hydraulic rupture. Mortar contains, wt %: grouting Portland cement 36.47-57.34, hollow aluminosilicate microspheres 6.47-17.65, carboaluminate additive 1.18-2.67, gypsum 1.18-2.67, and water or 4% calcium chloride solution. mud powder 0.71-1.78, water - the balance. Resulting stone shows expansion factor 0.1 to 0.3. EFFECT: decreased density of grouting mortar and increased strength of stone. 2 tbl

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RU 2 151 271 C1

Authors

Shcherbich N.E.

Shtol' V.F.

Ippolitov V.V.

Karmatskikh S.A.

Karelina N.E.

Jankevich V.F.

Frolov A.A.

Dates

2000-06-20—Published

1999-03-09—Filed