Downhole apparatus for generating electrical power in a well

E - Fixed Constructions – 21 – B

Patent

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Details

E21B 41/00 (2006.01)

Patent

CA 2221463

Electrical generating apparatus is provided which connects to the production tubing. In a preferred embodiment, this apparatus includes a housing having a primary flow passageway in communication with the production tubing. The housing also includes a laterally displaced side passageway communicating with the primary flow passageway such that production fluid passes upwardly towards the surface through the primary and side passageways. A flow diverter may be positioned in the housing to divert a variable amount of production fluid from the production tubing and into the side passageway. In accordance with an important feature of this invention, an electrical generator is located at least partially in or along the side passageway. The electrical generator generates electricity through the interaction of the flowing production fluid.

L'invention concerne un appareil fournissant de l'énergie électrique, qui est relié à la colonne de production dans un puits. Dans un mode de réalisation préféré, cet appareil comporte une enveloppe dotée d'un conduit principal d'écoulement relié à la colonne de production. L'enveloppe comporte aussi un conduit secondaire déplacé latéralement, qui communique avec le conduit d'écoulement principal de sorte que le liquide de production circule vers le haut en direction de la surface en empruntant les conduits principal et secondaire. Un déflecteur de liquide peut être placé dans l'enveloppe afin de dévier une quantité variable de liquide de production hors de la colonne de production pour qu'il s'écoule dans le conduit secondaire. La caractéristique importante de l'invention est qu'un générateur, situé au moins en partie dans le conduit secondaire ou le long de ce conduit, produit de l'électricité sous l'effet de l'écoulement du liquide de production.

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