US Patent 10125592 Methods and systems for treatment of subterranean formations

Improved methods and systems for treating subterranean formations using a sub-surface mixing system are disclosed. The disclosed system includes a well head and a first flow line that directs a blender fluid from a blender to the well head. A second flow line directs a Liquefied Petroleum Gas stream to the well head. A static mixer is positioned downhole and is fluidically coupled to the well head. The well head directs the blender fluid to the static mixer through a first flow path and it directs the Liquefied Petroleum Gas stream from the well head to the static mixer through a second flow path. The static mixer then mixes the blender fluid and the Liquefied Petroleum Gas stream.