Downhole load sharing motor assembly

E - Fixed Constructions – 21 – B

Patent

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Details

E21B 4/04 (2006.01) H02P 5/00 (2006.01) H02P 21/00 (2006.01)

Patent

CA 2702538

A motor assembly of multiple motors for use in driving a shared downhole load within a well. In particular, the assembly may employ substantially constant adjustable speed motors These may include permanent magnet synchronous machine motors The motors may be configured to operate at given speeds that may be downwardly adjusted depending on the amount of torque output independently exhibited by the individual motors In this manner, a significant divergence in torque output between the motors may be avoided so as to ensure substantial load sharing between all of the motors of the assembly.

L'invention décrite concerne un ensemble moteur comportant de multiples moteurs à utiliser dans l'entraînement d'une charge partagée en fond de trou, à l'intérieur d'un puits. En particulier, l'ensemble peut comprendre des moteurs à vitesse ajustable sensiblement constante. Ils peuvent comprendre des moteurs synchrones à aimants permanents. Les moteurs peuvent être configurés pour fonctionner à des vitesses données qui peuvent être ajustées vers le bas en fonction de la quantité de couple de sortie présentée indépendamment par les moteurs individuels. De cette manière, une divergence significative de couple de sortie entre les moteurs peut être évitée afin de garantir un partage de charge substantiel entre tous les moteurs de l'ensemble.

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