Earth boring – well treating – and oil field chemistry – Well treating – Contains organic component
Reexamination Certificate
2006-06-06
2006-06-06
Tucker, Philip C. (Department: 1712)
Earth boring, well treating, and oil field chemistry
Well treating
Contains organic component
C507S121000, C507S122000, C507S227000, C507S228000, C526S287000, C526S240000, C524S282000
Reexamination Certificate
active
07056868
ABSTRACT:
Water soluble associative polymers and compositions comprising them together with alkali metal salts of carboxylic acid are disclosed. Methods comprise introducing into a wellbore a fluid comprising such associative polymers and alkali metal salts of carboxylic acid, e.g., cesium formate. Disclosed water soluble associative polymers have functionality including at least sulfonate groups, carboxylate groups and hydrophobes associative with one another in a saturated aqueous solution of an alkali metal salt of a carboxylic acid. Water soluble associative polymers are formed as the polymerization reaction product of reactants comprising an AMPS reactant, an alpha, beta-unsaturated carbonyl reactant and a hydrophobe reactant selected from acrylic esters, methacrylic esters and a mixture of any of them, having a —COOR moiety wherein R is a hydrophobe which, as hydrophobe moieties of the resultant associative polymer, are associative with one another in a saturated aqueous solution of an alkali metal salt of a carboxylic acid.
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Benton William J.
Magri Neil
Miller Edward E.
Toups John
Banner & Witcoff , Ltd.
Cabot Corporation
Fritz Industries, Inc.
Tucker Philip C.
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