FLUID LOSS CONTROL AGENTS AND COMPOSITIONS FOR CEMENTING OIL WELLS COMPRISING SAID FLUID LOSS CONTROL AGENT

摘要

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.