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2 013 523

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C1

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IPC

(21) (22)

Application

4935742/03, 1991-03-18

(22)

Actual filing date

1991-03-18

(45)

Published

1994-05-30

(72)

Inventor

Kadyrova R.S.Arestov B.V.Khnykin Ju.F.Tsytsymushkin P.F.

(73)

Holder

Vserossijskij Nauchno-Issledovatel'Skij Institut Prirodnykh Gazov I Gazovykh Tekhnologij

EXPANDING OIL-WELL CEMENT Russian patent published in 1994 - IPC

Abstract RU 2013523 C1

FIELD: oil and gas producing industry. SUBSTANCE: oil-well cement contains (in % by mass): portland cement 7-14, sulfo compound 6-13, sulfo aluminate hydraulic binder 73-87. The sulfo aluminate hydraulic binder has the following phase composition (in % by mass): calcium sulfo aluminate 10-30, double-calcium silicate 67-75, double-calcium ferrite 3-10. As sulfo compound may be used gypsum dihydrate, or phosphogypsum, or boron gypsum. EFFECT: improved properties. 2 cl, 1 tbl

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RU 2 013 523 C1

Authors

Kadyrova R.S.

Arestov B.V.

Khnykin Ju.F.

Tsytsymushkin P.F.

Dates

1994-05-30—Published

1991-03-18—Filed

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