Shear activated inflation fluid system for inflatable packers

Details Shear activated inflation fluid system for inflatable packers Shear activated inflation fluid system for inflatable packers

E - Fixed Constructions

21

B

E21B 33/127 (2006.01) E21B 23/06 (2006.01)

Patent

CA 2506556

A subterranean well packer is inflated by a pumped transfer of rheotropic fluid through a tortuous flow channel into a packer sealing element expansion chamber. The tortuous flow channel and fluid delivery pressure are coordinated with the fluid properties to impose sufficient fluid shear stress for inducement of a substantial phase change in said reheotrpic fluid after entry into expanion chamber.

Selon cette invention, un packer de formation souterraine est gonflé par pompage d'un fluide de transfert rhéotropique circulant dans un canal d'écoulement sinueux à l'intérieur d'une chambre de dilatation d'un élément d'étanchéité. Le canal d'écoulement sinueux et la pression de distribution du fluide sont coordonnés aux propriétés du fluide afin d'imposer une force de cisaillement suffisante du fluide et d'induire une variation de phase substantielle dans le fluide rhéotropique après l'entrée de celui-ci dans la chambre de dilatation.

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