Water-soluble polymers comprising 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...http://www.google.es/patents/US5186257?utm_source=gb-gplus-sharePatente US5186257 - Polymers useful in the recovery and processing of natural resources
Polymers useful in the recovery and processing of natural resources
