Dual action valve including at least two pressure responsive mem
Dual aquafer electrical heating of subsurface hydrocarbons
Dual completion method for oil/gas wells to minimize water conin
Dual completion method for oil/gas wells to minimize water conin
Dual cylinder lift pump and method of recovering fluids from...
Dual displacement pumping system suitable for fluid...
Dual diverter and orientation device for multilateral...
Dual downhole injection system utilizing coiled tubing
Dual electric submergible pumping systems for producing...
Dual elevator system and method
Dual flapper valve assembly
Dual gearbox electric submersible pump assembly
Dual gradient steam foam oil displacement process
Dual hydraulic safety valve
Dual injection and lifting system using a rod driven progressive
Dual injection and lifting system using a rod driven progressive
Dual injection and lifting system using an electrical submersibl
Dual injection and lifting system using rod pump and an electric
Dual jacking system and method
Dual packer for a horizontal well