Rupture disc assembly that withstands much higher back...

E - Fixed Constructions – 21 – B

Patent

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Details

E21B 34/08 (2006.01) E21B 34/00 (2006.01)

Patent

CA 2676990

An activation rupture disc unit is provided that is capable of withstanding a substantially higher back pressure than its burst activation pressure. The unit includes a tubular housing having a fluid passage. Tapered wall structure defines at least a portion of the passage with the fluid outlet thereof being of greater area than the fluid inlet. A rupture disc is carried by the housing and has a central bulged section in fluid-blocking relationship to the passage. A tapered, self-releasing solid plug is positioned in and conforms to the tapered portion of the passage. The plug has a curved surface conforming to and positioned in full supporting relationship to the central section of the rupture disc. The plug is of sufficient mass to prevent rupture of the central section of the disc under a back pressure substantially greater than the activation pressure of the disc.

L'invention concerne une unité de disque de rupture d'activation capable de résister à une contre-pression sensiblement supérieure à sa pression d'actionnement de rupture. L'unité comprend un logement tubulaire ayant un passage de fluide. Une structure de paroi conique définit au moins une partie du passage, l'orifice de sortie de fluide de celle-ci étant d'une surface supérieure à l'orifice d'entrée de fluide. Un disque de rupture est porté par le logement et a une section bombée centrale en relation de blocage de fluide avec le passage. Un bouchon solide à libération automatique, conique est positionné dans et se conforme à la partie conique du passage. Le bouchon a une surface incurvée conforme à et positionnée dans une relation de plein support avec la section centrale du disque de rupture. Le bouchon est d'une masse suffisante pour empêcher la rupture de la section centrale du disque sous une contre-pression sensiblement supérieure à la pression d'activation du disque.

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