Dispersant for water-based solids-containing fluids and a drilling fluid
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United States of America Patent
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Apr 8, 1986
Grant Date -
N/A
app pub date -
Jan 12, 1984
filing date -
Jan 12, 1984
priority date (Note) -
Expired
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Abstract
The present invention provides a dispersant for water-based, solids-containing fluids comprising a copolymer of a sulfonated styrene monomer and a second monomer selected from the group consisting of maleic anhydride, maleimide, and dimethyl maleate, wherein the copolymer contains an amide formed on the second monomer. The amide can be formed on the second monomer by a reaction using a nitrogen source selected from the group consisting of ammonia, primary amines, and secondary amines. The dispersant can be used to form a water based drilling fluid. The present invention also provides a process of producing the dispersant.
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