Coated products and use thereof in oil fields

Details Coated products and use thereof in oil fields Coated products and use thereof in oil fields

E - Fixed Constructions

21

B

E21B 37/06 (2006.01) C09K 8/536 (2006.01) C09K 8/54 (2006.01) C09K 8/92 (2006.01) E21B 41/02 (2006.01)

Patent

CA 2255940

An oil field production chemical, especially a scale inhibitor, is in the form of particles thereof carrying a coating e.g. of a dispersing agent. The coating may be polymeric such as an oligomeric polyacid polyester, a polymeric alkoxylated alcohol or a fatty acid polyamine condensate or it may also be a surfactant and may be used in the form of a suspension in an inert oil, such as diesel oil or kerosene which may be injected into a subterranean formation to inhibit the formation of deposits, e.g. scale in oil wells over a longer period than compounds free of the coating.

Produit chimique d'amélioration de la production dans des champs pétrolifères, en particulier inhibiteur d'entartrage, sous forme de particules dudit inhibiteur enrobées, par exemple par un agent dispersant. Ledit enrobage peut être un polymère tel qu'un polyester de polyacide oligomère, un alcool alcoxylé polymère ou un condensat de polyamine d'acide gras, ou bien il peut être également un tensioactif et peut être utilisé sous forme d'une suspension dans une huile inerte, tel que du diesel ou du kérosène, pouvant être injectée dans une formation souterraine pour inhiber la formation de dépôts, par exemple de tartre, dans des puits de pétrole pendant un laps de temps plus long que les composés exempts d'enrobage.

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