METHOD TO KILL WELLS Russian patent published in 1995 - IPC

Abstract RU 2046932 C1

FIELD: oil extraction industry. SUBSTANCE: method provides, that well is killed by squeezing liquid in amount of one volume of "НКТ" without its squeezing in formation, then they carry out lifting-lowering operations to place "НКТ" shoe on depth of production stratum, after that keeping annulus valve open blocking liquid of one volume of "НКТ" is pumped in with squeezing liquid damping in block of refilling. Then they exercise blocking and squeezing liquids further pumping in with keeping annulus valve shut. Hydrocarbon composition and/or oxygen-containing solvent is used as blocking liquid. Hydrocarbon composition is taken from hydrocarbon fractions of direct oil distillation: hexane, benzene, toluene, xylene, nephras "C 50/170; chemical oil processing; nephras A 120/200; nephras A 150/330; nephras C5150/330; petrochemical industrial wastes; absorbents A-1 and A-2; pyrolysis light resin; butylenebenzene fraction; and oxygen-containing solvent from a number of low-molecular alcohols C1-C3, acids C1-C3 and ketones C3-C4. EFFECT: method provides maintaining and increase of boreholes production after repairs. 2 cl, 2 dwg, 2 tbl

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RU 2 046 932 C1

Authors

Telin A.G.

Artem'Ev V.N.

Khisamutdinov N.I.

Ezhov M.B.

Galantsev I.N.

Latypov A.R.

Khakimov A.M.

Tenjakov V.A.

Ismagilov T.A.

Dates

1995-10-27Published

1992-04-03Filed