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Application

98102967/03, 1998-02-27

(22)

Actual filing date

1998-02-27

(45)

Published

1999-02-27

(72)

Inventor

Sharifullin F.A.Mamedov B.A.Tsykin I.V.Ismagilov R.G.Trubanov V.N.Akimenko S.N.Mikhalkov S.G.

(73)

Holder

Mamedov Boris AbdulovichZazirnyj Dmitrij VladimirovichKorol' Pavel Vladimirovich

METHOD FOR ISOLATION OF GAS INTERFLOWS IN HOLE CLEARANCE Russian patent published in 1999 - IPC

Abstract RU 2126880 C1

FIELD: oil and gas production industry. SUBSTANCE: method may be used in repair operations for restoring inflow of fluids to well bore-hole. According to method, oil- bearing portion of productive bed is temporarily isolated. Interval of perforations within 0.5-1.0 m in bed roof is left free from temporary isolation. Injected through this interval into hole clearance of well is appropriate material at annular space being closed. Then injected is cement slurry and pressure-forced liquid. Within volume of pump-compressor pipes with extraction of injected volume of cement slurry, pressure-forced liquid is injected at open annular space and in volume of injected cement slurry at closed annular space. Pressure is released. Pump-compressor pipes are lifted above upper boundary of cement slurry. At closed annular space, injected into pump-compressor pipes is pressure-forced liquid in volume equal to volume of liquid discharged at pressure release and plus volume equal to volume of injected cement slurry. After hardening of cement, cement sleeve is drilled out, temporary isolation material is washed out, and created isolation plugs are checked for property. EFFECT: higher efficiency. 5 cl

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RU 2 126 880 C1

Authors

Sharifullin F.A.

Mamedov B.A.

Tsykin I.V.

Ismagilov R.G.

Trubanov V.N.

Akimenko S.N.

Mikhalkov S.G.

Dates

1999-02-27—Published

1998-02-27—Filed

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