Flow regulator for use in a subterranean well

E - Fixed Constructions – 21 – B

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E21B 43/16 (2006.01) E21B 34/08 (2006.01)

Patent

CA 2596408

A flow regulator for use in a subterranean well. A well flow regulating system includes a flow regulator for regulating a flow rate of a fluid in a wellbore, the flow rate remaining substantially constant while a differential pressure across the flow regulator varies. The flow regulator is adjustable while positioned within the wellbore to change the flow rate. Another well flow regulating system includes a flow regulator for maintaining a desired fluid flow rate between an annulus and an interior passage of a tubular string. The flow regulator includes a closure device, a biasing device which applies a biasing force to the closure device, and a flow restriction which operates to apply a restriction force to the closure device. The biasing force and/or the restriction force is adjustable downhole to change the flow rate.

L~invention a pour objet un régulateur de débit destiné à être utilisé dans un puits souterrain. Un système de régulation du débit d~un puits comprend un régulateur de débit pour réguler le débit d~un fluide dans un forage, le débit restant sensiblement constant tandis qu~une pression différentielle varie dans le régulateur de débit. Le régulateur de débit peut être réglé pendant qu~il est en place dans le forage pour modifier le débit. Un autre système de régulation du débit d~un puits comprend un régulateur de débit pour maintenir un débit de fluide voulu entre un espace annulaire et le passage intérieur d~une colonne tubulaire. Le régulateur de débit comprend un dispositif de fermeture, un dispositif de contrainte qui exerce une force de contrainte sur le dispositif de fermeture et un dispositif de restriction du débit qui exerce une force de restriction sur le dispositif de fermeture. Les forces de contrainte et/ou de restriction peuvent être régulées au fond pour modifier le débit.

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