Patent ID: 9688907
Date: 2017-06-27
CPC Classifications: C09K,E21B

Claim:
1. A method for treating at least part of a subterranean formation comprising: introducing an aqueous fracturing fluid into the subterranean formation, the aqueous fracturing fluid comprising from about 0.3 to about 3.0% by weight of a viscosifying agent wherein the viscosifying agent is an unpurified polygalactomannan ether containing from about 4 to about 25% by dry weight of impurities, wherein the unpurified polygalactomannan ether is prepared according to an etherification process comprising: wherein: the etherification process does not include any purification or washing step; and the impurities of the polygalactomannan ether are byproducts generated during the etherification process.