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Hydrolyzed co-polymers of N-vinylamide and acrylamide for use as waterloss control additives in drilling mud
Hydrolyzed co-polymers of N-vinylamide and acrylamide for use as waterloss control additives in drilling mud
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机译:N-乙烯基酰胺和丙烯酰胺的水解共聚物,用作钻井泥浆中的失水控制添加剂
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摘要
Aqueous, clay-based drilling mud compositions are improved with respect to waterloss control by the addition of a hydrolyzed copolymer of acrylamide and an N-vinylamide. The copolymer, which is effective over a broad range of molecular weights, contains at least 5 mol percent of the N-vinylamide monomer moiety of which at least 5 mol percent is hydrolyzed to vinylamine units. Well drilling is improved by circulating through the bore hole a drilling mud containing this waterloss control additive.
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