Apparatus and method for dual-zone well production

摘要: A method and an apparatus for producing fluid hydrocarbons through a single production tubing string from first second zones which communicate with hydrocarbon wellbore is disclosed. The includes packer positioned in the selectively preventing flow of fluids zone to zone, that extends communication pumps displacing string. pump displaces lower into perforated joint placed between pump. has given displacement capacity at speed type inhibits either direction when it not pumping zone. above predetermined greater than by desired be produced meters upper produces well so both are simultaneously without loss regardless pressure. means controlling depends on higher advantage simple inexpensive efficiently two pressure differentials Hydrocarbon thereby maximized, stabilized potentially prolonged.