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publicationNumber US-6180689-B1
titleOfInvention Fluid loss control agents and compositions for cementing oil wells comprising said fluid loss control agent
abstract The present invention concerns a fluid loss control agent for a petroleum industry (or analogous) cement slurry, comprising a surfactant and a micro-gel obtained by chemical cross-linking of a polyvinyl alcohol. The micro-gel and the surfactant are advantageously compatible with a wide range of petroleum industry cement additives and can also produce compositions which are gas tight.
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