Adjustable fit progressive cavity pump/motor apparatus and...

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

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F04C 2/107 (2006.01)

Patent

CA 2409040

The present invention provides an adjustable rotor (26) and/or stator (22), so that the interference fit and/or clearance can be adjusted. The rotor and/or stator are tapered to provide a difference in fit between the rotor and stator by longitudinal adjustment of their relative position. In one embodiment, the adjustment may occur while the PCP is mounted downhole in a wellbore. In another embodiment, the adjustment may occur automatically depending on sensor input of operating conditions of the PCP.

Rotor (26) et / ou stator (22) ajustables qui permettent de régler l'ajustement par serrage et / ou le jeu. Le rotor et / ou le stator sont coniques, ce qui permet de produire une différence d'ajustement entre le rotor et le stator par réglage longitudinal de leur position relative. Dans un mode de réalisation, le réglage peut avoir lieu alors que la pompe à cavité progressive est montée dans un puits de forage. Dans un autre mode de réalisation, le réglage peut avoir lieu automatiquement, en fonction des conditions de fonctionnement de ladite pompe détectées par des capteurs.

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