Encapsulated back-up system for use with seal system

Details Encapsulated back-up system for use with seal system Encapsulated back-up system for use with seal system

F - Mech Eng,Light,Heat,Weapons

16

J

F16J 15/16 (2006.01) E21B 33/12 (2006.01) F16L 7/02 (2006.01)

Patent

CA 2604343

Disclosed is an anti-extrusion assembly (12) used in conjunction with an expandable packing device. The assembly comprises two slotted metallic rings encapsulated in a non-metallic material . The slotted metallic rings prevent extrusion of the sealing mechanism of the expandable packing device as the device is set in a wellbore casing. The encapsulating non- metallic material protects the metallic rings from damage as the packing device is run into the wellbore. In an alternative embodiment, the anti-extrusion assembly comprises a crimped metallic ring flanked by non-metallic rings. As with the slotted metallic rings, the single crimped metallic ring prevents extrusion of the sealing mechanism of the expandable packing device as it is set in the wellbore casing.

La présente invention concerne un ensemble anti-extrusion s'utilisant conjointement avec un dispositif de garniture expansible. L'ensemble comprend deux bagues métalliques fendues encapsulées dans un matériau non métallique. Les bagues métalliques fendues empêchent l'extrusion du mécanisme d'obturation du dispositif de garniture expansible pendant la pose du dispositif dans un tubage de puits. Le matériau d'encapsulage non métallique protège les bagues métalliques contre les possibles détériorations pendant l'amenée du dispositif de garniture dans le puits. Pour un autre mode de réalisation, l'ensemble anti-extrusion comprend une bague métallique sertie flanquée par des bagues non métalliques. Comme pour les bagues métalliques fendue, la bague métallique sertie empêche l'extrusion du mécanisme d'obturation du dispositif de garniture expansible pendant sa pose dans le tubage de puits.

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