Sealing array for high temperature applications

Details Sealing array for high temperature applications Sealing array for high temperature applications

E - Fixed Constructions

21

B

E21B 33/12 (2006.01) E21B 33/00 (2006.01) F16F 15/20 (2006.01) F16J 15/26 (2006.01)

Patent

CA 2752848

A sealing array (100) for positioning in an annular space between tubular members (102, 114) to provide a seal therebetween. The sealing array (100) includes a pair of oppositely disposed backup rings (138, 140), each defining a primary outer seal member of the sealing array (100). A pair of rigid cap rings (158, 160) is disposed between the backup rings (138, 140). Each cap ring (158, 160) has a substantially planar surface and an oppositely disposed surface that engages one of the backup rings (138, 140) to energize the backup rings (138, 140) upon the application of sufficient pressure. The cap rings (158, 160) are sized to form controlled extrusion gaps with both tubular members (102, 114). An energizing element (178) is disposed between the planar surfaces of the cap rings (158, 160). The energizing element (178) engages a planar surface of at least one of the cap rings (158, 160) and seals the extrusion gaps (180, 182) associated with the engaged cap ring (158) upon the application of sufficient pressure.

L'invention concerne un complexe d'étanchéité (100) à positionner dans un espace annulaire entre des éléments tubulaires (102, 114) pour assurer l'étanchéité entre ces derniers. Le complexe d'étanchéité (100) comprend une paire de bagues anti-extrusion (138, 140) disposées à l'opposé l'une de l'autre définissant chacune un élément d'étanchéité extérieure principal du complexe d'étanchéité (100). Une paire de bagues de retenue rigides (158, 160) est disposée entre les bagues anti-extrusion (138, 140). Chaque bague de retenue (158, 160) a une surface sensiblement plane et une surface opposée qui s'engage dans l'une des bagues anti-extrusion (138, 140) pour la comprimer lors de l'application d'une pression suffisante. Les bagues de retenue (158, 160) sont dimensionnées de façon à former des intervalles d'extrusion contrôlée avec les deux éléments tubulaires (102, 114). Un élément de compression (178) est disposé entre les surfaces planes des bagues de retenue (158, 160). L'élément de compression (178) se met en prise avec une surface plane d'au moins l'une des bagues de retenue (158, 160) et scelle les intervalles d'extrusion (180, 182) associés à la bague de retenue (158) correspondante lors de l'application d'une pression suffisante.

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