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Polyalkyl methacrylate copolymers for rheological modification and filtration control for ester and synthetic based drilling fluids
Polyalkyl methacrylate copolymers for rheological modification and filtration control for ester and synthetic based drilling fluids
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机译:聚甲基丙烯酸烷基酯共聚物,用于酯基和合成基钻井液的流变改性和过滤控制
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摘要
A drilling fluid system for use in oil and gas well drilling operations is described having a rheological modifier/control agent comprising a polyalkyl methacrylate copolymer containing a small amount of vinyl pyrrolidone, a weighting agent, optionally an organophilic clay, with a base fluid making up the balance. The drilling fluid may be oil, invert emulsion, and in particular synthetic base fluid where the continuous phase may be synthetic esters olefins, paraffins, mineral oil or diesel oil, and the like. These copolymers prevent or reduce barite sag and provide cutting transport in these drilling systems.
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