Evaluation And Application Of The SDH Retarders For Oil Well Cement

In this paper, we prepared a series of experiments of retarder in lab, we not only culled SDH series retarder, but also optimized its proportion to other cement additives. After the retardation performance evaluation of class G cement, we culled an ideal retarder type.We tested the retarder's effect rule and the performance of its anti-high temperature and salt resistance. At the same time, we also tested SDH and its compatibility with other types cement additive and its effect to the performance of the cement(SDJ loss additive,SDJZ dispersant and so on).The result shows that: this kind of retarder has perfectly retardation performance and high anti-temperature and salt-resistance performance. It has good compatibility with other cement additives and has no bad effect to the cement.