Variable choke for use in a subterranean well and method of...

Details Variable choke for use in a subterranean well and method of... Variable choke for use in a subterranean well and method of...

E - Fixed Constructions

21

B

E21B 17/00 (2006.01) E21B 34/10 (2006.01) E21B 34/14 (2006.01) E21B 43/12 (2006.01)

Patent

CA 2297034

A flow control apparatus and associated methods of using provide enhanced longevity and reliability without requiring complex mechanisms. In a described embodiment, a choke for use within a subterranean well has a choke member set which may be opened by manipulation of an inner tubular cage. The inner cage is displaced from within an outer sleeve, which restricts fluid flow through ports formed through a sidewall portion of the inner cage. As the inner cage is progressively withdrawn from within the sleeve, the fluid flow through the ports is decreasingly restricted by the sleeve.

L'invention concerne un dispositif de commande de flux et des procédés d'utilisation associés, permettant d'obtenir une longévité et une fiabilité améliorées sans mécanismes complexes. Dans un mode de réalisation décrit, une duse destinée à être utilisée dans un puits souterrain comprend un ensemble d'éléments de duse pouvant être ouvert par manipulation d'une cage tubulaire interne. On déplace la cage interne de façon à la sortir d'un manchon externe qui empêche les fluide de s'écouler à travers les ouvertures formées dans une partie latérale de la cage interne. A mesure que la cage interne est retirée de l'intérieur du manchon, la rétention opérée par le manchon sur l'écoulement de fluide à travers les ouvertures diminue.

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