E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 33/06 (2006.01) F15B 15/26 (2006.01)
Patent
CA 2591955
A ram apparatus for a blowout preventer, said ram apparatus comprising a piston (50) for moving a ram block and a locking shaft (40) extending from the piston (120, 50) into a housing (22), characterised in that said locking shaft (40) comprises a tapered portion (41), the ram apparatus further comprising a locking member (70), such that, in use when said piston (120, 50) is extended said tapered portion (41) of said locking shaft (40) moves to said locking member (70), whereupon said locking member (70) moves against said tapered portion (41) to inhibit retraction of said piston (120, 50).
L'invention concerne un appareil à vérin destiné à un obturateur anti-éruption, ledit appareil à vérin comprenant un piston (50) qui sert à déplacer un bloc-vérin et un arbre de blocage (40) s'étendant à partir du piston (120, 50) dans un carter (22), caractérisé en ce que ledit arbre de blocage (40) comporte une portion biseautée (41), l'appareil à vérin comprenant en outre un élément de blocage (70) de sorte qu'en utilisation, à savoir au moment de l'allongement dudit piston (120, 50), ladite portion biseautée (41) dudit arbre de blocage (40) se déplace vers ledit élément de blocage (70), ledit élément de blocage (70) se déplaçant alors contre ladite portion biseautée (41) afin d'empêcher toute rétraction dudit piston (120, 50).
Mcfadden Fincham
Varco I/p Inc.
LandOfFree
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