METHOD FOR PREVENTING DEPOSITS OF NON-ORGANIC SALTS Russian patent published in 2014 - IPC C09K8/528 E21B37/00 C23F11/10 

Abstract RU 2531298 C1

FIELD: oil and gas industry.

SUBSTANCE: compound for preventing deposits of non-organic salts in oil-field equipment, in wt %: agent PAF-13A 1.5-15, which represents aqueous solution of polyethylenepolyaminemethylphosphonate admixed with sodium chloride, acid sodium salts of phosphoric and phosphorous acids and ethyleneglycol - 2-10. It contains additionally in wt %: aqueous solution of the mixture of sodium salts of nitrilotrimethyl-phosphonic acid and hydrochloric acid - production wastes of chelating agent Korilat 75-90, sodium hydrate - 0.35-3.4, nitrilotrimethyl-phosphonic acid (NTF) - 1.5-4.0, thiocarbamide - 0.05-0.2.

EFFECT: compound is an effective inhibitor to prevent deposits of carbonate and sulphate non-organic salts; it has low unit costs, low corrosion activity towards metal equipment, low freezing temperature and prevents saline deposits in conditions of oil production with any degree of water content.

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Authors

Panteleeva Al'Bina Romanovna

Tishankina Raisa Fazylovna

Polovnjak Sergej Valentinovich

Tishankina Irina Valer'Evna

Safin Anatolij Narimanovich

Dates

2014-10-20Published

2013-03-18Filed