Sealing assembly for subsea wellheads

Details Sealing assembly for subsea wellheads Sealing assembly for subsea wellheads

E - Fixed Constructions

21

B

E21B 33/035 (2006.01) E21B 33/038 (2006.01)

Patent

CA 2200129

A sealing assembly (40) for fitting between an upper wellhead connector (12) and a lower wellhead housing or hub 14. Upper wellhead connector (12) has a downwardly facing frusto-conical sealing surface (32) and wellhead housing (14) has an upwardly facing frusto-conical sealing surface (34). Sealing assembly (40) includes a metal ring (42) having annular grooves (58) therein to receive elastomeric sealing elements (60) therein. Elastomeric sealing elements (60) have extending lips (62) for contacting and sealing against adjacent sealing surfaces (32, 34) spaced from opposed frusto-conical surfaces (54, 56) on the metal ring (42) to provide elastomeric seals for the sealing surfaces (32, 34) of wellhead connector (12) and wellhead housing (14).

L'invention vise un joint d'étanchéité (40) à poser entre un connecteur supérieur (12) d'une tête de puits et l'enveloppe de cette dernière (14). Le raccord supérieur (12) comporte une surface de scellement tronconique convexe (32) et l'enveloppe (14), une surface de scellement tronconique concave (34). Le joint comporte un anneau métallique (42) à rainures annulaires servant à recevoir des éléments de scellement (60) en élastomère. Ces éléments (60) comportent des lèvres qui viennent s'appuyer contre les surfaces adjacentes (32, 34), opposées aux surfaces tronconiques (54, 56) de l'anneau métallique (42), et forment ainsi une étanchéité élastomérique entre le connecteur et l'enveloppe.

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