Safety lock for elevators

E - Fixed Constructions – 21 – B

Patent

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Details

E21B 19/07 (2006.01)

Patent

CA 2512328

An elevator having a safety lock is provided to prevent the inadvertent release of a tubular. In one embodiment, the elevator includes a body for supporting the tubular and a locking apparatus activatable by an upset portion of the tubular, the safety locking apparatus adapted to prevent the tubular handling apparatus from releasing the tubular when activated. In another embodiment, the elevator is provided with a secondary override locking device for the safety lock so that jarring operations may be performed using the elevator.

Description d'un blocage de sécurité pour ascenseurs qui permet d'éviter la libération involontaire d'un tube. Dans un mode de réalisation, l'ascenseur comporte un corps pour soutenir les tubes et un dispositif de blocage activable par une partie de tube défaillant, le dispositif de blocage de sécurité étant réglé pour empêcher l'appareil de manutention tubulaire de libérer le tube lorsque celui-ci est activé. Dans un autre mode de réalisation, l'ascenseur est équipé d'un dispositif de blocage secondaire pour remplacer le verrou de sécurité de façon à ce que les manouvres de battage puissent être effectuées en utilisant l'ascenseur.

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