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2 017 935

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C1

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IPC

(21) (22)

Application

4841440/03, 1990-06-18

(22)

Actual filing date

1990-06-18

(45)

Published

1994-08-15

(72)

Inventor

Mrochko N.A.Zezekalo I.G.Sotula L.F.Zubko N.V.

(73)

Holder

Ukrainskij Nauchno-Issledovatel'Skij Institut Prirodnykh Gazov

METHOD FOR ELIMINATION OF GAS CROSS-FLOWS BETWEEN STRINGS Russian patent published in 1994 - IPC

Abstract RU 2017935 C1

FIELD: maintenance of oil and gas wells. SUBSTANCE: method includes well heating, injection of saturated aqueous solution of mineral salt heated up to well temperature. Prior to injecting the aqueous solution, the well is heated to temperature. Prior to injecting the aqueous solution, the well is heated to temperature 15-30 C higher than that of enclosing rocks. Mineral salt is used in form of salt whose solubility reduces with temperature drop, e.g., ammonium chloride. EFFECT: higher efficiency. 2 cl

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RU 2 017 935 C1

Authors

Mrochko N.A.

Zezekalo I.G.

Sotula L.F.

Zubko N.V.

Dates

1994-08-15—Published

1990-06-18—Filed

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