| 摘要 |
Improved set retarded cement compositions for cementing subterranean zones in wells at low temperatures having excellent short term compressive strength development and methods of using such compositions are provided. The compositions are basically comprised of a hydraulic cement, water and a copolymer containing 2-acrylamido-2-methylpropane sulfonic acid in an amount in the range of from about 65 to about 85 mole percent and acrylic acid in an amount in the range of from about 15 to about 35 mole percent having an average molecular weight below about 5000.
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