Inhibiting naphthenate solids and emulsions in crude oil

Details Inhibiting naphthenate solids and emulsions in crude oil Inhibiting naphthenate solids and emulsions in crude oil

2011-08-23

2011-08-23

Kugel, Timothy J. (Department: 1765)

Earth boring, well treating, and oil field chemistry

Preventing contaminant deposits in petroleum oil conduits

C166S304000, C507S240000

Reexamination Certificate

active

08003574

ABSTRACT:
Naphthenic acid solids and/or emulsions can be inhibited by introducing an additive to crude oil prior to or concurrent with the deprotonation of the naphthenic acids present in the crude oil. The additives may be surfactants and can be amines, quaternary ammonium compounds, quaternary phosphonium compounds, and mixtures of both. The additives may also be linear compounds having at least two carboxylic acid or acrylic acid functional moieties.

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Vindstad et al.; “Fighting Naphthenate Deposition at the Heidrun Field,” SPE 80375, SPE 5th International Symposium on Oilfield Scale, Aberdeen, UK, Jan. 29-30, 2003, pp. 1-7.

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