Gas displaced chamber lift system with closed...

E - Fixed Constructions – 21 – B

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E21B 43/16 (2006.01) E21B 34/06 (2006.01) E21B 43/12 (2006.01) F04B 7/02 (2006.01)

Patent

CA 2426306

An artificial lift system for pumping fluid from a well using gas displacement. The system includes a pump (14, 24) with at least one chamber which is alternately allowed to fill with well fluid by venting gas from the chamber and passing a power gas into the chamber to displace the well fluid through a liquid string (18). The venting is through multi stage vents (21, 20) which allow a high pressure range to be vented directly to a third stage of a multi stage compressor (28, 37); and which allow a lower pressure range to vent to the wellbore (16), which is connected to the first stage (35) of the compressor (37).

L'invention concerne un système artificiel de levage servant à pomper le fluide d'un puits par déplacement de gaz. Ce système comprend une pompe (14, 24) renfermant au moins une chambre pouvant être remplie de fluide issu du puits par dégazage de la chambre, suivi du transfert d'un gaz de combustion dans la chambre afin de déplacer le fluide du puits au moyen d'une tige (18) de liquide. Le dégazage s'effectue par l'intermédiaire d'évents (21, 20) à étages multiples permettant à une plage de haute pression d'être ventilée directement à un troisième étage d'un compresseur (28, 37) à étages multiples, et permettant à une plage de pression inférieure d'être ventilée au puits de forage (16), qui est connecté au premier étage (35) du compresseur (37).

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