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2 361 899

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(51)

IPC

C09K8/467(2006-01-01)

(21) (22)

Application

2007113364/03, 2007-04-10

(24)

Start date

2007-04-10

(22)

Actual filing date

2007-04-10

(45)

Published

2009-07-20

(72)

Inventor

Egorova Anastasija DmitrievnaMestnikov Aleksej EgorovichNarodov Vasilij Vasil'Evich

(73)

Holder

Obshchestvo S Ogranichennoj Otvetstvennost'Ju Tsentr"

EXPANDING BACKFILL MATERIAL Russian patent published in 2009 - IPC C09K8/467

Abstract RU 2361899 C2

FIELD: mining.

SUBSTANCE: here is disclosed expanding backfill material for cementing oil and gas wells in complicated geological-technical conditions of cryolite zone requiring upgraded reliability of isolation of beds. Expanding backfill material contains, wt %: Portland cement 22-30; gypsum 50-60, zeolite 18-20, and fluidifier C-3 2.

EFFECT: reduced period of material cementation, increased strength, decreased cost of process.

1 tbl

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RU 2 361 899 C2

Authors

Egorova Anastasija Dmitrievna

Mestnikov Aleksej Egorovich

Narodov Vasilij Vasil'Evich

Dates

2009-07-20—Published

2007-04-10—Filed