降滤失剂 meaning in English

fluid loss additive
fluid loss agent

The study results indicated that , arranged in the order of magnitude , the degrees of the effects on the cementing strengths of the two interfaces were the system , emulsion , main emulsifier , fluid loss control agent and white oil respectively ; the cementing strength would be doubled and redoubled after being cleaned by preflush , especially by the system , emulsion and fluid loss control agent ; and , along with the increase in the mix slurry ratio , the initial and final set times of slurry would be obviously lengthened and the compressive strength of bond cement would be remarkably reduced or the slurry wouldn ' t be even set
研究表明：对两界面胶结强度的影响由大到小依次是体系、乳状液、主乳化剂、降滤失剂、白油；前置液清洗后，胶结强度成倍提高，尤其对体系、乳状液和降滤失剂清洗效果最佳；随混浆比的增大，水泥浆初凝和终凝时间明显延长，水泥石抗压强度明显下降，甚至不凝。