Downhole anchoring tools conveyed by non-rigid carriers

E - Fixed Constructions – 21 – B

Patent

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Details

E21B 23/01 (2006.01) E21B 23/04 (2006.01) E21B 31/107 (2006.01) E21B 31/113 (2006.01) E21B 43/116 (2006.01) E21B 43/119 (2006.01)

Patent

CA 2378518

An apparatus and method provides an anchor device (18) for use in a wellbore (10) that comprises an actuator assembly (104) responsive to an actuating signal, an operator coupled to the actuator assembly (104) and an engagement member moveable to a set position by the operator when actuated by the actuator assembly (104) to set the anchor device (18). The anchor device (18) may be employed in various tool strings, such as a perfo-rating tool string (14). In one arrangement, the anchor device (18) provides an automated retraction mechanism that is activated after a predetermined time delay. In another arrangement, a retract signal may be supplied to ac-tivate the retraction mechanism (152).

La présente invention concerne un appareil et un procédé qui comprend un dispositif (18) d'ancrage destiné à un puits de forage (10). Ce dispositif comprend un ensemble dispositif de commande (104) sensible à un signal de commande, un opérateur couplé à cet ensemble dispositif de commande (104) et un élément d'accrochage que l'opérateur peut déplacer dans une position de mise en place lorsque ce dernier est commandé par l'ensemble dispositif de commande (104) pour une mise en place de ce dispositif d'ancrage (18). Ce dispositif d'ancrage (18) peut être utilisé avec diverses tiges de forage, telles qu'une tige de perforation (14). Dans un agencement particulier, le dispositif d'ancrage (18) possède un mécanisme de rétraction automatisé qui est activé après un délai prédéterminé. Dans un autre type d'agencement, un signal de rétraction peut être produit pour activer le mécanisme de rétraction (152).

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