E - Fixed Constructions
21
B
E21B 34/10 (2006.01)
Patent
CA 2613628
A downhole valve comprises a body defining a through bore and a valve member for location in the body and movable between an open position and a closed position. The valve has a first configuration in which the valve member is normally closed, and will hold a pressure differential in a first direction, and a second configuration in which the valve member is closed and will maintain a pressure differential in the first direction and also in an opposite second direction and a third configuration in which the valve member is locked in the open position until it is deliberately closed.
La présente invention concerne, d'une part un clapet de fond de puits comprenant un corps définissant en traversée un alésage, et d'autre part un obturateur venant dans le corps et mobile entre une position ouverte et une position fermée. Ce clapet connaît trois configurations. En première configuration, l'obturateur est normalement fermé, conservant un différentiel de pression dans un premier sens. En deuxième configuration, l'obturateur est fermé, conservant un différentiel de pression dans ce même sens ainsi que dans le sens inverse. En troisième configuration, l'obturateur se bloque en position ouverte jusqu'à ce qu'on le ferme délibérément.
Lambert Anthony R.
Renovus Limited
LandOfFree
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