E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 33/06 (2006.01)
Patent
CA 2611238
A blowout preventer (100) to hydraulically seal a wellbore includes a housing (102) configured to be positioned above a wellhead and to surround a drillstring (112), a plurality of rams (120) positioned perpendicular to an axis (114) of the drillstring to engage the drillstring (112) and hydraulically isolate an annulus (116) between the wellbore and the drillstring (112) when in a closed position, and a roller lock (350, 250) positioned about a thrust rod (326, 226, 126) of each ram (120) configured to maintain the rams (120) in the closed position.
Selon l'invention, un bloc obturateur de puits (100) permettant de réaliser l'obturation hydraulique d'un puits comporte un carter (102) configuré pour être placé au-dessus du puits et pour envelopper un train de tiges de forage (112), une pluralité de mâchoires (120) placées perpendiculairement à un axe (114) du train de tiges pour venir en prise avec le train de tiges (112) et, en position fermée, isoler hydrauliquement un espace annulaire (116) entre le puits et le train de tiges (112), et un dispositif de verrouillage à rouleaux (350, 250) placé autour d'une tige de poussée (326, 226, 126) de chaque mâchoires (120) et configuré pour maintenir les mâchoires (120) en position fermée.
Berckenhoff Michael Wayne
Judge Robert Arnold
Borden Ladner Gervais Llp
Hydril Llc
Hydril Usa Manufacturing Llc
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