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2 136 855

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IPC

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Application

99100003/03, 1999-01-05

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Start date

1999-01-05

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Actual filing date

1999-01-05

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Published

1999-09-10

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Inventor

Mamedov B.A.Zazirnyj D.V.Sharifullin F.A.Dzhafarov I.S.Osipov M.L.Rublev A.B.Tsykin I.V.Ismagilov R.G.Mikhajlishin P.B.

(73)

Holder

Mamedov Boris AbdulovichZazirnyj Dmitrij VladimirovichSharifullin Farid Abdullovich

WELL KILLING METHOD Russian patent published in 1999 - IPC

Abstract RU 2136855 C1

FIELD: oil and gas production. SUBSTANCE: invention, in particular, relates to killing gas wells or gas inrush-complicated oil wells, and can also be used when suppressing outbursts during drilling or repair operations. Gas is bled from tubing and from annular space until pressure in wellhead zone achieves value by 0.5- 1.0 MPa below pressurization pressure. Thereafter, water is injected into annular space with tubing closed in volume not exceeding volume of well. After process pause, gas is removed and viscous-elastic composition is injected into annular space in volume equal to annular space plus volume of tubing, the latter being opened in its wellhead end. Composition is then forced by water into formation and water is pumped in into angular space in volume equal to angular space, tubing being closed in its wellhead end. After process pause, gas is removed and killing fluid is injected into annular space in volume equal to annular space plus volume of tubing, now reopened. EFFECT: enhanced efficiency of killing gas-filled wells. 7 cl

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RU 2 136 855 C1

Authors

Mamedov B.A.

Zazirnyj D.V.

Sharifullin F.A.

Dzhafarov I.S.

Osipov M.L.

Rublev A.B.

Tsykin I.V.

Ismagilov R.G.

Mikhajlishin P.B.

Dates

1999-09-10—Published

1999-01-05—Filed

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