An apparatus for reverse circulation cementing of surface casing in subterranean formations and associated methods are provided. One example of a method may involve a method of reverse circulation cementing a surface casing in a well bore with a conductor casing positioned therein comprising: providing...http://www.google.com/patents/US8162047?utm_source=gb-gplus-sharePatent US8162047 - Reverse-circulation cementing of surface casing
