Bulged single-hinged scored rupture disc having a...

E - Fixed Constructions – 21 – B

Patent

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Details

E21B 47/10 (2006.01) E21B 34/06 (2006.01)

Patent

CA 2465673

A unitary, forward buckling rupture disc is provided that is adapted to be mounted in a holder in which the disc is in closing relationship to a tubing string in an oil well and has greatest utility for testing the integrity of the connection between the sections of oil well tubing strings. The disc is designed to withstand the fluid pressure head in the string and a leak test pressure, and to then burst and fully open under a predetermined overpressure. The concavo, convex bulged section of the disc has a non-circular, continuous score line formed in the concave face thereof. The score line is of continuously varying depth around its circumference and includes an outwardly projecting cam segment which is of greatest depth that ruptures first and is in direct opposition to a lesser depth score line portion forming a hinge area for the burst region of the disc.

Cette invention concerne un disque de sécurité unitaire, bombé vers l'avant, qui est conçu pour être monté dans un support. Dans ce support, le disque est étroitement associé à un train de tubes dans un puits de forage. ; il convient au mieux pour le contrôle de l'intégrité des raccords entre les éléments du train de tubes. Ce disque est étudié pour résister à une hauteur de pression dans le train de tubes et à une pression d'essai de fuite, mais pour se rompre et s'ouvrir complètement sous une surpression prédéterminée. La partie bombée concavo-convexe du disque présente une ligne de rayage continue non circulaire dans la concavité. Cette ligne de rayage continue, de profondeur variable, comprend un segment de came dépassant vers l'extérieur, correspondant à la profondeur la plus importante, qui se rompt en premier et qui s'oppose directement à une partie de ligne de moindre profondeur formant une zone de pliage pour la région d'éclatement du disque.

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