Active intake pressure control of downhole pump assemblies

F - Mech Eng,Light,Heat,Weapons – 04 – C

Patent

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F04C 14/24 (2006.01) E21B 43/12 (2006.01) F04C 2/107 (2006.01)

Patent

CA 2604998

Progressive cavity pump assemblies including one or more mechanisms adapted to regulate intake pressure of the main pump between a minimum intake pressure and a maximum intake pressure. In one embodiment, the mechanism is a sealing member configured to open at a threshold pressure to discharge wellbore fluid and close after falling below the threshold pressure. In an alternative embodiment, the mechanism may be a regulator assembly that adjusts the volume of output from the charge pump to the interconnect according to the pressure in the interconnect.

Ensembles de pompe à rotor hélicoïdal excentré comprenant un ou plusieurs mécanismes adaptés à réguler la pression d'admission de la pompe principale entre une pression d'admission minimale et une pression d'admission maximale. Dans une réalisation, le mécanisme est un élément d'étanchéité configuré pour ouvrir à une pression seuil pour décharger un fluide de puits et pour fermer après s'être abaissé en-dessous de la pression seuil. Dans une autre réalisation, le mécanisme peut être un ensemble régulateur qui règle le volume de la sortie à partir de la pompe de charge à l'interconnexion selon la pression de l'interconnexion.

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