Encapsulated water absorbent polymers as lost circulation additives for aqueous drilling fluids
作者： Clarence O. Walker
DOI:
关键词: Seal (mechanical) 、 Borehole 、 Drilling fluid 、 Aqueous solution 、 Polymer 、 Petroleum engineering 、 Casing 、 Lost circulation 、 Materials science 、 Composite material
摘要: The disclosed invention is a novel drilling fluid additive for use in reducing lost circulation wellbores and method employing the such circulation. highly water absorbent polymer encapsulated by reaction-preventive protective casing to prevent from expanding absorbing until it desired breach casing. may be film which will dissolve after time of residence borehole or waxy substance melt at temperature borehole, releasing expand water. substantially expanded seal off thief zones fissures,
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