E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 33/03 (2006.01) E21B 33/038 (2006.01) E21B 33/04 (2006.01)
Patent
CA 2726335
A dual barrier lock screw for a wellhead assembly is provided that includes a first seal disposed at a first axial location along the body of the screw and a second seal disposed at a second axial location along the body of the screw, wherein the first and second axial locations are different from one another. The screw may also include a passage extending axially through the body of the screw and coupled to a port at the end of the screw. The port is configured to receive external pressure and allow testing of the dual barrier seals of the lock screws. A system that includes the lock screw and methods of operating and testing the lock screw are also provided.
L'invention concerne une vis de blocage double barrière destinée à un ensemble tête de puits comprenant un premier joint d'étanchéité disposé à un premier emplacement axial le long du corps de la vis et un second joint d'étanchéité disposé à un second emplacement axial le long du corps de la vis, le premier et le second emplacement axiaux étant différents l'un de l'autre. La vis peut également comprendre un passage s'étendant axialement à travers le corps de la vis et couplé à un orifice à une extrémité de la vis. L'orifice est configuré pour recevoir une pression externe et permettre la soumission des joints d'étanchéité double barrière des vis de blocage à un essai. L'invention concerne également la vis de blocage et des procédés de fonctionnement et de soumission de la vis de blocage à des essais.
Cameron International Corporation
Tomkins Donald V.
LandOfFree
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