Well cement additives, compositions and methods
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United States of America Patent
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Dec 24, 2002
Grant Date -
N/A
app pub date -
Nov 19, 2001
filing date -
Nov 19, 2001
priority date (Note) -
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Abstract
Improved well cement additives, compositions and methods of using the compositions are provided. The well cement additives are basically comprised of a first monomer selected from the group of 2-acrylamido-2-methylpropane sulfonic acid, 2-allyloxy-2-hydroxy-1-propane sulfonic acid and vinylsulfonic acid, a second monomer selected from the group of N,N-dimethylacrylamide, acrylamide, N-vinylpyrrolidone, N-vinylacetamide and acrylonitrile and a third monomer selected from the group of C.sub.6 to C.sub.22 dimethylaminopropylmethacrylamide bromide, chloride and iodide and C.sub.6 to C.sub.22 dimethylaminoethylmethacrylate bromide, chloride and iodide.
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