Method for reducing the viscosity of viscous fluids

F - Mech Eng,Light,Heat,Weapons – 17 – D

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F17D 1/17 (2006.01) C10L 1/32 (2006.01)

Patent

CA 2540767

A viscous fluid, such as heavy crude oil which is too viscous to enable it to be pumped from a flowing phase of a reservoir into and along a pipeline for delivery to a refinery or other storage facility, may be contacted with a formulation to reduce its viscosity. The formulation comprises a polymeric material AA which includes -O- moieties pendent from a polymeric backbone thereof and said material is optionally cross-linked. In one embodiment, the formulation may comprise polyvinyl alcohol. In an alternative embodiment, the formulation may comprise a cross-linked polymeric material, such as cross- linked polyvinyl alcohol. After the viscous composition has been transported to a desired location, it may be separated from the other components.

Certains matériaux visqueux tels que le pétrole brut lourd, trop visqueux pour être pompés en phase fluide à partir d'un réservoir et acheminés par oléoduc vers une raffinerie ou autre installation de stockage, peuvent être mélangés à un produit qui en réduit la viscosité. Un tel produit consiste en un polymère AA comportant des fragments O- pendant de son squelette, et facultativement réticulé. Dans une exécution, le produit peut être un alcool de polyvinyle. Dans une autre exécution, le produit peut être un polymère réticulé tel qu'un alcool de polyvinyle réticulé. Lorsque le transport du matériau visqueux fluidifié a été effectué, le produit fluidifiant peut être séparé des autres composants.

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