A system for treating a tar sands formation is disclosed. A plurality of heaters are located in the formation. The heaters include at least partially horizontal heating sections at least partially in a hydrocarbon layer of the formation. The heating sections are at least partially arranged in a pattern...http://www.google.ca/patents/US7562706?utm_source=gb-gplus-sharePatent US7562706 - Systems and methods for producing hydrocarbons from tar sands formations
