E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 33/04 (2006.01) E21B 33/043 (2006.01)
Patent
CA 2132465
An internal lockdown will lock a tubing hanger in a wellhead housing. The tubing hanger has a conical cam surface formed on the exterior. An internal profile is located in the bore of the housing in alignment with the cam surface. A landing sub secures to a threaded bore of the tubing hanger and protrudes above. A carrier ring mounts to exterior threads formed on the landing sub. The carrier ring carries a set of segmented dogs. After the tubing hanger lands, the landing sub is unscrewed relative to the tubing hanger and carrier ring assembly. Then, the landing sub is lowered, pushing the dogs out into engagement with the profile.
Verrou interne bloquant une suspension de tubes de production dans une enveloppe de tête de puits. La suspension des tubes de production a une surface de came conique formée sur l'extérieur. Un profil interne est situé dans l'alésage de l'enveloppe et aligné avec la surface de la came. Un raccord de pose se fixe à un alésage fileté de la suspension des tubes de production et en dépasse. Un anneau porteur s'adapte aux filetages extérieurs formés sur le raccord de pose. L'anneau porte un ensemble de taquets segmentés. Une fois posée la suspension de tubes de production, le raccord de pose est dévissé en regard de l'ensemble associant l'anneau porteur et la suspension des tubes de production. Puis le raccord de pose est abaissé, enclenchant les taquets dans le profil.
Abb Vetco Gray Inc.
Kirby Eades Gale Baker
LandOfFree
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