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    • 8. 发明申请
    • Method and system for controlling a downhole flow control device
    • 控制井下流量控制装置的方法和系统
    • US20070187091A1
    • 2007-08-16
    • US11352668
    • 2006-02-13
    • Guy P. Vachon
    • Guy P. Vachon
    • E21B43/12
    • E21B23/04E21B34/10E21B34/16
    • A system for controlling flow in a wellbore uses a downhole flow control device positioned at a downhole location in the wellbore. The flow control device has a movable element for controlling a downhole fluid flow. In response to an applied pressure pulse, the movable element moves in finite increments from one position to another. In one embodiment, a hydraulic source generates a transmitted pressure pulse to the flow control device wherein the maximum pressure of a received pressure pulse downhole is sufficient to overcome a static friction force associated with the movable element, and wherein a minimum pressure of the received pressure pulse downhole is insufficient to overcome a dynamic friction force associated with the movable element.
    • 用于控制井眼中的流动的系统使用位于井筒中的井下位置处的井下流量控制装置。 流量控制装置具有用于控制井下流体流动的可移动元件。 响应于施加的压力脉冲,可移动元件以一个位置到另一个位置以有限的增量移动。 在一个实施例中,液压源产生传递的压力脉冲到流量控制装置,其中井下接收的压力脉冲的最大压力足以克服与可移动元件相关联的静摩擦力,并且其中接收压力的最小压力 脉冲井下不足以克服与可移动元件相关联的动态摩擦力。
    • 9. 发明授权
    • Method and system for controlling a downhole flow control device
    • 控制井下流量控制装置的方法和系统
    • US08602111B2
    • 2013-12-10
    • US11352668
    • 2006-02-13
    • Guy P. Vachon
    • Guy P. Vachon
    • E21B34/16
    • E21B23/04E21B34/10E21B34/16
    • A system for controlling flow in a wellbore uses a downhole flow control device positioned at a downhole location in the wellbore. The flow control device has a movable element for controlling a downhole fluid flow. In response to an applied pressure pulse, the movable element moves in finite increments from one position to another. In one embodiment, a hydraulic source generates a transmitted pressure pulse to the flow control device wherein the maximum pressure of a received pressure pulse downhole is sufficient to overcome a static friction force associated with the movable element, and wherein a minimum pressure of the received pressure pulse downhole is insufficient to overcome a dynamic friction force associated with the movable element.
    • 用于控制井眼中的流动的系统使用位于井筒中的井下位置处的井下流量控制装置。 流量控制装置具有用于控制井下流体流动的可移动元件。 响应于施加的压力脉冲,可移动元件以一个位置到另一个位置以有限的增量移动。 在一个实施例中,液压源产生传递的压力脉冲到流量控制装置,其中井下接收的压力脉冲的最大压力足以克服与可移动元件相关联的静摩擦力,并且其中接收压力的最小压力 脉冲井下不足以克服与可移动元件相关联的动态摩擦力。
    • 10. 发明授权
    • System and method of selecting the reproducible colors in a discrete
reproduction system
    • 在离散再现系统中选择可重现颜色的系统和方法
    • US5287122A
    • 1994-02-15
    • US572205
    • 1990-08-23
    • Guy P. Vachon
    • Guy P. Vachon
    • G03F3/08H04N1/407H04N1/60B41J2/36
    • H04N1/4072H04N1/6027
    • A method of reproduction in a discrete reproduction system where the available colors are arranged in equally perceptible steps. Because in a discrete reproduction system only a limited set of points can be produced from the gamut of colors, the present method selects the color variables describing the set of points such that the difference between colors is equiperceptible. Preferably, a numerical approximation to the Munsell book of color is used to determine the hue, saturation, and luminance of the colors used in the reproduction system.The preferred embodiment is a gray scale printer where the preceived contrast between levels of gray is uniform--i.e. equiperceptible. To achieve equiperceptible gray scale requires that the increments in print density be nonuniform. To determine the desired print density to achieve an equiperceptible gray scale, the print density is determined using a numerical approximation of the Munsell value coordinates.
    • 一种在离散再现系统中再现的方法,其中可用颜色被排列成同等可感知的步骤。 因为在离散再现系统中,只能从颜色的色域产生有限的一组点,所以本方法选择描述点集的颜色变量,使得颜色之间的差异是不可接受的。 优选地,使用孟塞尔颜色书的数值近似来确定在再现系统中使用的颜色的色调,饱和度和亮度。 优选实施例是灰度级打印机,其中灰度级别之间的预见对比度是均匀的。 不可接受 为了达到可接受的灰度级,需要打印浓度的增量是不均匀的。 为了确定所需的打印浓度以达到等值的灰度级,使用孟塞尔值坐标的数值近似来确定打印浓度。