Methods and apparatus are disclosed for fracturing subterranean formations using fracturing fluids that are hydrated from dry mix blends. One aspect of the invention comprises a dry blended particulate composition for hydraulic fracturing comprising a particulate hydratable polysaccharide, a particulate...http://www.google.de/patents/US5981446?utm_source=gb-gplus-sharePatent US5981446 - Apparatus, compositions, and methods of employing particulates as fracturing fluid compositions in subterranean formations
