Patent ID: 7866394
Filing Date: 2011-01-11
Classification: C04B,C09K,E21B

Abstract:
1. A method of cementing in a subterranean formation comprising: running a casing in a wellbore; plugging a water source in the subterranean formation with a swelling agent comprising a superabsorbent to reduce an amount of water flowing into a cement slurry, wherein the superabsorbent is a sodium acrylate-based polymer wherein the superabsorbent has an original volume and is capable of increasing in volume from about 10 to 400 times the original volume, and wherein the swelling agent is present in the cement slurry in an amount ranging from about 1 to about 50% by weight of the cement slurry; pumping the cement slurry into the subterranean formation; and allowing the slurry to set.