Earth boring – well treating – and oil field chemistry – Well treating – Contains organic component
Patent
1992-11-06
1995-01-17
Geist, Gary
Earth boring, well treating, and oil field chemistry
Well treating
Contains organic component
166283, 507225, 507925, E21B 4300
Patent
active
053823710
ABSTRACT:
Water-soluble polymers comprising an N-vinyl amide such as an N-vinyl lactam are found to be useful in processes wherein the polymer is introduced into a subterranean wellbore.
Polymers useful in the recovery of natural resources are prepared by polymerizing an N-vinyl lactam by free radical initiation with polymerization conducted in an aqueous solution polymerization medium preferably containing a mixture of dissolved electrolytes, or in a polymerization medium consisting essentially of a tertiary alkanol. Copolymers of such N-vinyl lactams with unsaturated amides, and terpolymers prepared by polymerizing an N-vinyl lactam and an unsaturated amide with a selected termonomer compound are also useful when prepared by these methods. The invention also broadly encompasses utilizing a water-soluble polymer comprising at least one of a hydrophilic vinyl-containing sulfonate, phosphonate or ester and/or a hydrophilic N-vinyl lactam for applications under hostile conditions.
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Bjornson Geir
Hedges James H.
Hsieh Henry L.
Moradi-Araghi Ahmad
Stahl G. Allan
Geist Gary
Haag G. L.
Phillips Petroleum Company
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