The composition of claim 1 defined further to include particulate silica.ģ. Said borate compound is capable of providing a borate ion specie in said composition.Ģ. Said set retarder is a copolymer consisting of acrylic acid and 2-acrylamido, 2-methylpropane sulfonic acid (AMPS) present in said copolymer in the range of from about 40 to about 60 mole percent, said copolymer having an average molecular weight below about 5,000 such that a 10 percent aqueous solution of said copolymer has a Brookfield viscosity reading at 20 rpm of the UL Adapter Spindle in the range of from about 2 to less than 5 centipoises, said copolymer being present in said cement composition in an amount in the range of from about 0.3 percent to about 5.0 percent by weight of said hydraulic cement and further wherein A retarded cement composition consisting essentially of hydraulic cement, water, a set retarder and a borate compound, wherein: METHOD FOR THE PRODUCTION OF WATER-PERMEABLE POROUS CONCRETEġ. HYDRAULIC CEMENT AND METHOD OF CEMENTING IN ENVIRONMENTS HAVING ELEVATED TEMPERATURES Method of cementing a high temperature borehole Oil field cementing methods and compositionsĬementitious composition and cement produced therefrom Method of using thixotropic cements for combating lost circulation problems Hydrolytically stable polymers for use in oil field cementing methods and compositions Method of using thixotropic cements for combating gas migration problems Set retarded cement compositions and well cementing methods Well cementing method using an AM/AMPS fluid loss additive blend Method of reducing fluid loss in cement compositions containing substantial salt concentrations Method of reducing fluid loss in cement compositions which may contain substantial salt concentrationsĭrilling fluids containing AMPS, acrylic acid, itaconic acid polymer High temperature set retarded well cement compositions and methods
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