Patent ID: 7943555
Filing Date: 2011-05-17
Classification: C04B,C09K

Abstract:
1. A wellbore treatment composition comprising: a polymeric solution comprising polyvinylpyrrolidone for placement in a wellbore that penetrates a subterranean formation; and an activator; wherein the volume ratio of the polymer solution to the activator is in the range of from about 50:50 to about 70:30, which is a volume of activator sufficient to cause polyvinylpyrrolidone to precipitate out of the polymeric solution when the polymeric solution and the activator come into contact, wherein the activator comprises a formate brine selected from the group consisting of a potassium formate brine, a cesium formate brine, a zinc formate brine, and combinations thereof, and wherein the resulting precipitate is capable of at least partially blocking a flow of a wellbore servicing fluid into the subterranean formation.