Apparatus and methods to control fluid flow in a downhole tool

E - Fixed Constructions – 21 – B

Patent

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Details

E21B 49/10 (2006.01)

Patent

CA 2696581

The present invention relates to a pumping system (600) for controlling fluid flow in a downhole tool (200). The pumping system icludes a hydraulically actuatable device including at least one cavity for receiving pressurized hydraulic fluid (616) and a reservoir (608) for storing the hydraulic fluid. A first (602a) and second (602b) hydraulic pump include an inlet (612a, 612b) fluidly coupled to the reservoir (608) and an outlet (614a, 614b) fluidly coupled (616) to the at least one cavity. At least one motor (604) is operatively coupled to at least one of the first (602a) and second (602b) hydraulic pumps. In addition, the system includes means (622a, 622b) for selectively flowing hydraulic fluid from the outlet of at least one of the first and second pumps to the at least one cavity.

L'invention porte sur des appareils et sur des procédés pour réguler un écoulement de fluide dans un outil de fond de trou. Un exemple de système décrit comprend un dispositif pouvant être actionné de façon hydraulique comportant une cavité pour recevoir un fluide hydraulique sous pression stocké par un réservoir, des première et deuxième pompes hydrauliques, un moteur et des moyens pour faire circuler de façon sélective un fluide hydraulique à partir de l'orifice de sortie d'au moins l'une des première et deuxième pompes vers la ou les cavités. Les première et deuxième pompes hydrauliques comprennent un orifice d'entrée couplé vis-à-vis des fluides au réservoir et un orifice de sortie couplé vis-à-vis des fluides à la cavité, et le moteur est couplé de façon opérationnelle à au moins l'une des pompes.

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