首页>
外国专利>
Acrylamide terpolymer shale stabilizing additive for low viscosity oil and gas drilling operations
Acrylamide terpolymer shale stabilizing additive for low viscosity oil and gas drilling operations
展开▼
机译:丙烯酰胺三元共聚物页岩稳定添加剂,用于低粘度石油和天然气钻井作业
展开▼
页面导航
摘要
著录项
相似文献
摘要
A low viscosity drilling fluid and method for stabilizing a downhole shale formation are disclosed. The fluid comprises an aqueous solution of a partialy transamidated hydrolyzed acrylamide copolymer, potassium chloride, a weighting agent and an optional viscosifying agent. The copolymer comprises from about 50 to about 98 mole percent primary amide functionality, from about 0.1 to about 15 mole percent secondary amide functionality and from about 2 to about 50 mole percent of the acrylate salt. The drilling fluid has a density out from about 8 to about 18 pounds per gallon and a viscosity of from about 5 to about 30 centistokes.
展开▼