The invention discloses a water shutoff agent for oil extraction, which is prepared by mixing epoxy resins, polyethylene ammonia, calcium lignosulphonate, calcium chloride and water.
本发明公开了一种采油用堵水剂，由环氧树脂、聚乙烯聚氨、木质素磺酸钙、氯化钙、水混合组成。
An excellent pumping admixture was made up by use of FDN compounded with calcium lignosulphonate, retarder for controlling slump loss and water retaining admixture for reducing water segregation rate.
FDN与木钙复合，以缓凝剂控制坍落度经时损失，以保水剂降低混凝土泌水率，配制出混凝土坍落度经时损失较小、性能优良的多元复合泵送剂。
The SRA has better effect than lignosulphonate calcium as the forming retarded time is longer.
在延迟成型时间较长时，SRA起到的缓凝作用比木钙更明显。
The SRA has better effect than lignosulphonate calcium as the forming retarded time is longer.
在延迟成型时间较长时，SRA起到的缓凝作用比木钙更明显。
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