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Polyaminopolyamide-epichlorohydrin resins for use as clay and shale inhibition agents for the drilling industry
Polyaminopolyamide-epichlorohydrin resins for use as clay and shale inhibition agents for the drilling industry
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机译:聚氨基聚酰胺-表氯醇树脂,用作钻井行业的粘土和页岩抑制剂
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摘要
The hydration of clays and shale in drilling operations may be inhibited by employing an aqueous based drilling fluid comprising a shale hydration inhibition agent comprising a polyaminopolyamide-epichlorohydrin resin, preferably the polyaminopolyamide-epichlorohydrin resin is a reaction product of an aliphatic polyamine, an aliphatic polycarboxylic acid, and epichlorohydrin. The shale hydration inhibition agent should be present in the aqueous based drilling fluid in sufficient concentration to reduce the reactivity, such as swelling, of clays and shale when exposed to water-based drilling fluids.
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