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2 087 674

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IPC

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Application

93032605/03, 1993-06-22

(22)

Actual filing date

1993-06-22

(45)

Published

1997-08-20

(72)

Inventor

Rakhimkulov R.Sh.Afridonov I.F.Latypov R.A.

(73)

Holder

Bashkirskij Gosudarstvennyj Nauchno-Issledovatel'Skij I Proektnyj Institut Nefti Filial Aktsionernoj Neftjanoj Kompanii

METHOD FOR SELECTIVE ISOLATION OF PRODUCTIVE RESERVOIR AT CEMENTATION OF PRODUCTION STRING Russian patent published in 1997 - IPC

Abstract RU 2087674 C1

FIELD: oil production industry. SUBSTANCE: according to method, installed on production string before its lowering into well are upper and lower packing units which are located respectively above roof and below foot of productive reservoir. Installed above upper packing unit is cementation sleeve. Cementation of annular space is performed. For this purpose, hermetically sealed first is annular space under foot of productive reservoir. This is made by opening of lower packing unit. Then, similar operation is performed above roof of productive reservoir. Cement mortar is injected under pressure first under lower packing unit, then injection of cement mortar is performed through cementation sleeve. EFFECT: high efficiency. 4 dwg

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RU 2 087 674 C1

Authors

Rakhimkulov R.Sh.

Afridonov I.F.

Latypov R.A.

Dates

1997-08-20—Published

1993-06-22—Filed

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