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2 225 898

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IPC

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Application

2003113131/02, 2003-04-29

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Start date

2003-04-29

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Actual filing date

2003-04-29

(45)

Published

2004-03-20

(72)

Inventor

Panteleeva A.R.Tishankina R.F.Tishankina I.V.Badrieva G.G.Sagdiev N.R.Prudovskij M.A.Tarasov S.G.Frolova M.A.

(73)

Holder

Otkrytoe Aktsionernoe Obshchestvo

INHIBITED HYDROCHLORIC ACID PRODUCTION PROCESS Russian patent published in 2004 - IPC

Abstract RU 2225898 C1

FIELD: oil and gas production. SUBSTANCE: invention relates to preparation of inhibited hydrochloric acid for use in oil production, in particular for treatment of bottom zones of producing and water-injecting wells. Process comprises dilution of hydrochloric acid with water and addition of nitrogen-containing component, namely primary aliphatic amines of formula NH₂R or their mixture with secondary aliphatic amines of formula NHR₂, where R represents C8-C20-alkyl, or isoalkylamines comprising branched structure of amine fraction C12-C18, and also addition of a nonionic surfactant and formaldehyde-containing compound taken jointly with aliphatic alcohol at their ratio (3-15): 1, respectively. Thus, acid corrosion inhibiter is formed in hydrochloric acid itself. EFFECT: simplified preparation procedure. 3 cl, 1 tbl, 30 ex

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RU 2 225 898 C1

Authors

Panteleeva A.R.

Tishankina R.F.

Tishankina I.V.

Badrieva G.G.

Sagdiev N.R.

Prudovskij M.A.

Tarasov S.G.

Frolova M.A.

Dates

2004-03-20—Published

2003-04-29—Filed