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    • 105. 发明授权
    • Variable flow resistance system for use in a subterranean well
    • 用于地下井的可变流阻系统
    • US08261839B2
    • 2012-09-11
    • US12792117
    • 2010-06-02
    • Michael L. FrippJason D. Dykstra
    • Michael L. FrippJason D. Dykstra
    • E21B34/08F15C1/16
    • E21B43/12E21B34/06Y10T137/2087Y10T137/2109
    • A variable flow resistance system can include a flow chamber through which a fluid composition flows in a well, the chamber having an inlet and an outlet. The fluid composition enters via the inlet in a direction which changes based on a ratio of desired to undesired fluid in the fluid composition. A well system can include a variable flow resistance system through which a fluid composition flows between a tubular string and a formation, the flow resistance system including a flow chamber through which the fluid composition flows, with only one chamber inlet. The fluid composition flows more directly from the inlet to an outlet as a ratio of desired to undesired fluid in the fluid composition increases. Another flow resistance system can include at least one structure which influences portions of the fluid composition which flow circuitously between the inlet and the outlet to maintain such circuitous flow.
    • 可变流阻系统可以包括流动室,流体组合物通过该流动室在井中流动,所述室具有入口和出口。 流体组合物通过入口沿着基于流体组合物中期望流体与不期望流体的比例变化的方向进入。 井系统可以包括可变流动阻力系统,流体组合物通过该可变流动阻力系统在管状管柱和地层之间流动,流动阻力系统包括流体组合物流过的流动室,仅具有一个室入口。 随着流体组合物中期望流体与不需要的流体的比例增加,流体组合物更直接地从入口流出到出口。 另一流阻系统可以包括至少一种影响流体组合物在入口和出口之间循环流动以保持这种迂回流动的部分的结构。
    • 108. 发明申请
    • Methods for managing flow control valves in process systems
    • 在过程系统中管理流量控制阀的方法
    • US20080183336A1
    • 2008-07-31
    • US11700533
    • 2007-01-31
    • Jason D. Dykstra
    • Jason D. Dykstra
    • G05D7/00
    • G05D7/0635G05B13/041G05B23/0283
    • Methods for managing the operational condition of flow control valves in process systems. As a control valve experiences mechanical wear during operation, the physical changes to the valve can alter its dead band and flow coefficient. A non-linear dynamic model determines the present dead band by modeling the relationship between the actual flow through the valve and the commanded drive signal to the valve. The present valve flow coefficient can be determined by removing the dead band from the drive signal and using that modified signal in a flow rate model for the valve to adaptively find the flow coefficient value which matches the predicted flow from the flow rate model to the present measured flow from a flow rate sensor. The present dead band and flow coefficient can be used to update valve control algorithms and to make valve maintenance decisions.
    • 管理流程系统中流量控制阀运行状态的方法。 由于控制阀在运行过程中经历机械磨损,因此阀门的物理变化可改变其死区和流动系数。 非线性动力学模型通过建模通过阀门的实际流量与到阀门的指令驱动信号之间的关系来确定当前死区。 目前的阀流量系数可以通过从驱动信号去除死区来确定,并且在阀的流量模型中使用该修正信号来自适应地找到与从流速模型到现在的预测流量相匹配的流量系数值 从流量传感器测量流量。 目前的死区和流量系数可用于更新阀门控制算法并进行阀门维护决策。
    • 110. 发明申请
    • Systems for self-balancing control of mixing and pumping
    • 混合泵送自平衡控制系统
    • US20080165613A1
    • 2008-07-10
    • US11803151
    • 2007-05-11
    • Jason D. Dykstra
    • Jason D. Dykstra
    • B28C7/04G05D11/02G05D9/00
    • B01F15/00207B01F15/00233B01F15/00285E21B21/062E21B33/14G05D11/135
    • Systems for controlling the in-feed and discharge rates of materials flowing into and out of a mixing process where one priority is to achieve a target mixture flow rate from the mixing process and another priority can be to achieve a target value for a mixture property. Actuators can be operated to control material in-feed rates, the mixture composition, and discharge rate, and can maintain a hold-up of the mixture in the mixing process. A total flow rate controller provides a control signal to a controller acting on the discharge rate and a controller acting on the in-feed rates. The mixture discharge flow rate can be automatically reduced from its desired target when the commanded rate of at least one of the materials exceeds its available supply rate as inferred from an inability to maintain the targeted value for the mixture property.
    • 用于控制流入和流出混合过程的材料的进料和排出速率的系统,其中一个优先事项是从混合过程获得目标混合物流速和另一优先级可以是获得混合物性质的目标值。 可以操作致动器来控制材料进料速率,混合物组成和排出速率,并且可以在混合过程中保持混合物的滞留。 总流量控制器向控制器提供控制信号,该控制器作用于排放速率,控制器作用于进给速率。 当不能维持混合物性能的目标值时,当至少一种材料的指令速率超过其可用供应速率时,混合物排放流量可以从其期望的目标自动降低。