Invention Grant
US07863224B2 Wellbore servicing compositions comprising a set retarding agent and methods of making and using same 有权
井筒维修组合物,其包含凝固阻滞剂及其制备和使用方法

Wellbore servicing compositions comprising a set retarding agent and methods of making and using same
Abstract:
A method of servicing a wellbore comprising preparing a composition comprising a calcium aluminate cement, water, a polyphosphate, a pozzolan, and a set retarding agent, wherein the set retarding agent comprises an alkali halide and a basic phosphate salt, placing the composition in the wellbore and allowing the composition to set. A composition comprising a calcium aluminate cement in an amount of from about 30 wt. % to about 60 wt. % and a set retarding agent in an amount of from about 0.1 wt. % to about 15 wt. % based upon the total weight of the composition, wherein the set retarding agent comprises an alkali halide and a basic phosphate salt in a ratio of from about 3:1 to about 1:3.
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