Polymers useful in the recovery and processing of natural resour

Details Polymers useful in the recovery and processing of natural resour Polymers useful in the recovery and processing of natural resour

1984-01-09

1990-08-28

Barr, Josephine

Compositions

Leather or fur treating

166275, 166274, 166273, 523130, 523131, C09K 300, E21B 4316

Patent

active

049519212

ABSTRACT:
Water-soluble polymers comprising 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 and a hydrophilic N-vinyl lactam under hostile conditions.

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