Activating means for drilling apparatus

Details Activating means for drilling apparatus Activating means for drilling apparatus

E - Fixed Constructions

21

B

E21B 23/00 (2006.01) E21B 23/04 (2006.01) E21B 33/129 (2006.01) E21B 33/1295 (2006.01) E21B 43/10 (2006.01)

Patent

CA 2219206

An activating means for activating a down-hole tool incorporates a magnet, which may include an attracting magnet (12) and a repelling magnet (13), and which may move under hydraulic pressure from an active position at which it causes a trigger, valve (8) or spring to be energised to a non active position at which the tool is not activated, the activating means thereby utilising hydraulic pressure without requiring hydraulic ports in the liner or mandrel.

Cette invention concerne un système d'actionnement d'un outil de fond de puits, lequel système comprend un aimant se composant d'un aimant attractif (12) et d'un aimant répulsif (13). Sous l'effet d'une pression hydraulique, cet aimant peut passer d'une position active, durant laquelle il entraîne le fonctionnement d'un déclencheur, d'un clapet (8) ou d'un ressort, à une position non active durant laquelle l'outil n'est pas actionné. Ce système d'actionnement fait appel à la pression hydraulique sans pour autant nécessiter la présence d'orifices hydrauliques dans le revêtement ou le mandrin.

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