A method for drilling, running casing in, and/or cementing a borehole in a subterranean formation without significant loss of drilling fluid is disclosed, as well as compositions for use in such method. The method employs a drilling fluid comprising a fragile gel or having fragile gel behavior and providing...http://www.google.com.au/patents/US20050032652?utm_source=gb-gplus-sharePatent US20050032652 - Method of formulating and using a drilling mud with fragile gels
