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ADDITIF POUR CIMENT DE PUITS DE PÉTROLE ET LAITIER DE CIMENT UTILISANT LEDIT ADDITIF POUR CIMENT DE PUITS DE PÉTROLE
ADDITIF POUR CIMENT DE PUITS DE PÉTROLE ET LAITIER DE CIMENT UTILISANT LEDIT ADDITIF POUR CIMENT DE PUITS DE PÉTROLE
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摘要
Provided is an additive for oil well cement, containing a vinyl alcohol polymer, the additive having good fluid loss reducing performance. The additive for oil well cement is a saponified product of a copolymer of a vinyl ester monomer and a multifunctional monomer, and has a degree of saponification of 70 to 95 mol% and a viscosity-average degree of polymerization of 1000 to 10000.
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