E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 23/06 (2006.01) E21B 23/04 (2006.01)
Patent
CA 2548458
Various embodiments of an improved downhole disconnect tool are provided, some of which may include a first housing releasably connected to a second housing, a first piston releasably connected to the first housing, and a second piston releasably connected to the second housing. Various fluid communication ports and ball seats may be provided in various combinations in the first and second pistons and in the second housing to enable remote control of the tool by circulating one or more balls into engagement with one or more of the ball seats to disconnect the first housing from the second housing, and thereby disconnect any structures connected to the first and second housings, respectively. Other features and aspects of the invention are also provided.
La présente invention concerne divers modes de réalisation d'un outil de déconnexion de fond de trou amélioré, dont certains peuvent comprendre un premier logement relié de façon libérable à un second logement, un premier piston relié de façon libérable au premier logement, et un second piston relié de façon libérable au second logement. Divers orifices de communication fluidique et sièges de bille peuvent être aménagés selon différentes combinaisons dans le premier et le second piston et dans le second logement afin de permettre de télécommander l'outil en faisant circuler une ou plusieurs billes qui viendront se placer dans les sièges de bille afin de déconnecter le premier logement du second logement, et déconnecter de la sorte les quelconques structures reliées au premier et au second logement, respectivement. L'invention porte également sur d'autres caractéristiques et aspects.
Schlumberger Canada Ltd.
Smart & Biggar
LandOfFree
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