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IPC

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Application

97120435/03, 1997-11-26

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Start date

1997-11-26

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Actual filing date

1997-11-26

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Published

1999-10-27

(72)

Inventor

Ragulin V.A.Valeev M.D.Garifullin F.S.Pirogova V.A.Shakrislamov A.G.

(73)

Holder

Aktsionernaja Neftjanaja Kompanija

METHOD OF PREVENTING DEPOSITS OF INORGANIC SALTS AND IRON SULFIDE IN CRUDE OIL PRODUCTION AND TRANSPORT AREAS Russian patent published in 1999 - IPC

Abstract RU 2140522 C1

FIELD: oil and gas production. SUBSTANCE: invention, in particular, relates to salt deposits in wells, oil-field collection system, crude oil transportation and storage, and also in oil formations flooded for secondary oil production. Most spread sulfate and carbonate mineral salts including iron-containing components, e.g. iron sulfide, are prevented to form in equipment by way of treating wells with reagent based on 1:1 w/w mixture of nitrilotrimethylphosphonic acid and its trisodium salt with N-sec- methylmethylenephosphite-N-C8-C10-alkylamine. EFFECT: increased reliability of underground equipment operation and its running time is increased by nearly four times. 7 tbl

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RU 2 140 522 C1

Authors

Ragulin V.A.

Valeev M.D.

Garifullin F.S.

Pirogova V.A.

Shakrislamov A.G.

Dates

1999-10-27—Published

1997-11-26—Filed

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