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2 347 798

(13)

(51)

IPC

C09K8/467(2006-01-01)

(21) (22)

Application

2007124088/03, 2007-06-26

(24)

Start date

2007-06-26

(22)

Actual filing date

2007-06-26

(45)

Published

2009-02-27

(72)

Inventor

Akhrimenko Vjacheslav Efimovich

(73)

Holder

Federal'Noe Gosudarstvennoe Obrazovatel'Noe Uchrezhdenie Vysshego Professional'Nogo Obrazovanija Kubanskij Gosudarstvennyj Agrarnyj Universitet

BACKFILL MIXTURE Russian patent published in 2009 - IPC C09K8/467

Abstract RU 2347798 C1

FIELD: chemistry.

SUBSTANCE: present invention pertains to strengthening oil and gas wells. The backfill mixture contains Portland cement and mixing liquid, containing water, methylcellulose, melamine formaldehyde resin, potassium chloride and silica gel, with the following ratio of ingredients, in wt %: Portland cement 64.39-64.97, methylcellulose 0.16-0.27, melamine formaldehyde resin 0.16-0.27, potassium chloride 1.05-5.24, silica gel 3.5-5.24, water - the rest.

EFFECT: reduced permeability of cement stone and its increased early strength at low temperatures above zero.

5 ex, 1 tbl

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RU 2 347 798 C1

Authors

Akhrimenko Vjacheslav Efimovich

Dates

2009-02-27—Published

2007-06-26—Filed