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    • 5. 发明授权
    • Cement retarder
    • 水泥缓凝剂
    • US07896964B2
    • 2011-03-01
    • US11965319
    • 2007-12-27
    • Stephane BoulardJesse Lee
    • Stephane BoulardJesse Lee
    • C04B24/04
    • C04B22/02C04B24/04C09K8/467
    • The invention provides a cementitious composition for oilfield application comprising an organic retarder having at least one carboxylate group and copper ions such that a complex is made between copper ion and carboxylate group. Also a method to retard cementitious composition for oilfield application is disclosed, the method comprising the unique double step of adding an organic retarder having at least one carboxylate group and adding copper ions such that a complex is made between copper ion and carboxylate group.
    • 本发明提供一种用于油田施用的水泥组合物,其包含具有至少一个羧酸盐基团和铜离子的有机延迟剂,使得在铜离子和羧酸盐基团之间形成络合物。 还公开了一种延缓油田施用的胶结组合物的方法,该方法包括添加具有至少一个羧酸酯基的有机延迟剂并加入铜离子以使得在铜离子和羧酸酯基之间形成络合物的独特的双重步骤。