Pressure actuated downhole tool

E - Fixed Constructions – 21 – B

Patent

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Details

E21B 34/10 (2006.01) E21B 21/10 (2006.01)

Patent

CA 2322863

A downhole tool (20) comprises a body (22), a tool function member (28, 30) axially movable relative to the body (22) from an initial position to an operative position, a first spring (32) responsive to a first fluid pressure force for permitting movement of the tool function member (28) from the initial position to an intermediate position; and a second spring (33) responsive to a higher second fluid pressure force for selectively permitting movement of the tool function member (30) to the operative position. The tool function member may be in one or two parts and may include a bypass sleeve (30).

Cet outil fond de trou (20) comprend un corps (22), un élément de fonctionnement (28, 30) d'outil, mobile axialement par rapport au corps (22), entre une position initiale et une position de fonctionnement, un premier ressort (32) sensible à une première force de pression de fluide et servant à déplacer l'élément de fonctionnement (28) entre une position initiale et une position intermédiaire, ainsi qu'un second ressort (33) sensible à une seconde force de pression de fluide, supérieure à la première, et permettant, de manière sélective, le déplacement de l'élément de fonctionnement (28), afin de mettre celui-ci en position de fonctionnement. Cet élément de commande d'outil peut être en une ou deux parties et il peut comporter un manchon de dérivation (30).

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