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    • 2. 发明授权
    • Fluid metering device and method for well tool
    • 流体计量装置和井工具的方法
    • US08157016B2
    • 2012-04-17
    • US12390758
    • 2009-02-23
    • Paul G. James
    • Paul G. James
    • E21B34/10
    • E21B23/04E21B34/10F15B11/13F15B2211/405F15B2211/455
    • A method of actuating a well tool includes the steps of: increasing pressure in a fluid line of a fluid metering device; closing a pilot-operated valve in response to the pressure increasing step; and discharging a predetermined volume of fluid from the metering device in response to the pressure increasing and valve closing steps. A fluid metering device for a well tool includes a piston separating chambers; and a pilot-operated valve which selectively prevents fluid communication between the chambers in response to at least a predetermined pressure being applied to a fluid line of the metering device, and which permits fluid communication through the valve between the chambers in response to pressure in the fluid line being less than the predetermined pressure. A greater pressure may be applied to the fluid line to thereby bypass the metering device and allow fluid to discharge from the line.
    • 致动井工具的方法包括以下步骤:增加流体计量装置的流体管线中的压力; 响应于所述增压步骤关闭先导阀; 并响应于增压和关阀步骤从计量装置排出预定体积的流体。 用于井具的流体计量装置包括活塞分离室; 以及先导式操作阀,其选择性地防止响应于至少预定压力施加到计量装置的流体管线的腔室之间的流体连通,并且其允许通过响应于所述计量装置中的压力而在腔室之间的阀的流体连通 流体管线小于预定压力。 可以将更大的压力施加到流体管线,从而绕过计量装置并允许流体从管线排出。
    • 5. 发明申请
    • FLUID METERING DEVICE AND METHOD FOR WELL TOOL
    • 流体测量装置和方法
    • US20100212910A1
    • 2010-08-26
    • US12390758
    • 2009-02-23
    • Paul G. JAMES
    • Paul G. JAMES
    • E21B34/06E21B34/00
    • E21B23/04E21B34/10F15B11/13F15B2211/405F15B2211/455
    • A method of actuating a well tool includes the steps of: increasing pressure in a fluid line of a fluid metering device; closing a pilot-operated valve in response to the pressure increasing step; and discharging a predetermined volume of fluid from the metering device in response to the pressure increasing and valve closing steps. A fluid metering device for a well tool includes a piston separating chambers; and a pilot-operated valve which selectively prevents fluid communication between the chambers in response to at least a predetermined pressure being applied to a fluid line of the metering device, and which permits fluid communication through the valve between the chambers in response to pressure in the fluid line being less than the predetermined pressure. A greater pressure may be applied to the fluid line to thereby bypass the metering device and allow fluid to discharge from the line.
    • 致动井工具的方法包括以下步骤:增加流体计量装置的流体管线中的压力; 响应于所述增压步骤关闭先导阀; 并响应于增压和关阀步骤从计量装置排出预定体积的流体。 用于井具的流体计量装置包括活塞分离室; 以及先导式操作阀,其选择性地防止响应于至少预定压力施加到计量装置的流体管线的腔室之间的流体连通,并且其允许通过响应于所述计量装置中的压力而在腔室之间的阀的流体连通 流体管线小于预定压力。 可以将更大的压力施加到流体管线,从而绕过计量装置并允许流体从管线排出。