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采用差热分析法和水溶液密封老化后的特性粘度法，全面系统地研究了国内外十种降滤失剂的耐温性。通过差热分析和水溶液老化后的特性粘度测出了各种降滤失剂的耐温次序和分解温度。所获得降滤失剂的耐温次序大体与在钻井液中的情况一致，而耐受温度的最高限却与在钻井液中的情况不符，差热分析法高出甚远而特性粘度法则偏低。
The differential thermal analysis method and the intrinsic viscosity of the aqueous solution after sealing aging were used to comprehensively and systematically study the temperature resistance of ten fluid loss additives at home and abroad. Through the differential thermal analysis and the intrinsic viscosity of the aqueous solution after aging, the temperature resistance order and the decomposition temperature of various fluid loss additives were measured. The temperature-tolerance order of the obtained fluid loss additive is generally the same as that in the drilling fluid, while the maximum temperature endure does not correspond with that in the drilling fluid, and the differential thermal analysis method is far superior to the intrinsic viscosity law low.