Well isolation device with disengagable constraint for...

E - Fixed Constructions – 21 – B

Patent

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Details

E21B 33/12 (2006.01)

Patent

CA 2586327

Disclosed herein is a temporary well isolation device, which is sealingly disposable in downhole tubing, and which has a housing with an axial passage. The temporary well isolation device also has frangible barrier element within the housing, where the frangible barrier element is sealingly engaged in the passage blocking fluid flow through the passage. The frangible barrier element bears a load from fluid pressure. The temporary well isolation device also has a disengagable constraint in contact with a frangible barrier element so as to redirect the load on the frangible barrier element from a first component of the load to a second component of the load, thereby preventing rupture of the frangible barrier element. Also disclosed herein is a method for disintegrating a frangible barrier element disposed in a passage of a temporary well isolation device.

On décrit un dispositif d'isolement temporaire de puits, qui est disposé de manière étanche dans un tube de fond et qui comporte un logement doté d'un passage axial. Le dispositif d'isolement temporaire de puits comporte aussi un élément barrière frangible dans le logement, l'élément barrière frangible étant engagé de manière étanche dans le passage bloquant l'écoulement du fluide dans le passage. L'élément barrière frangible porte une charge de pression du fluide. Le dispositif d'isolement temporaire de puits est également doté d'un élément de contrainte à dégagement en contact avec un élément barrière frangible de manière à rediriger la charge sur l'élément barrière frangible d'un premier composant de la charge vers un deuxième composant de la charge, évitant ainsi la rupture de l'élément barrière frangible. On présente également une méthode pour désintégrer un élément barrière frangible disposé dans un passage d'un dispositif d'isolement temporaire de puits.

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