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1. 发明授权

US08555914B2 Method for autonomous control of a chemical injection systems for oil and gas wells 有权
标题翻译：油气井化学注入系统自主控制方法
公开(公告)号：US08555914B2
公开(公告)日：2013-10-15
申请号：US13732999
申请日：2013-01-02
申请人： Robert E. Smith, IV , Maurice Slot , Richard R. Watson
发明人： Robert E. Smith, IV , Maurice Slot , Richard R. Watson
IPC分类号： F16K31/12
CPC分类号： E21B37/06 , E21B34/16 , E21B41/02 , G05B15/02 , G05D7/0635 , Y10T137/0368 , Y10T137/0379 , Y10T137/7759 , Y10T137/776 , Y10T137/7761
摘要： A control program for a positive displacement metering system measures the time required for the travel of a free piston in a cylinder of known volume to determine an average flow rate during a full stroke of the piston. The system may also measure and record the inlet and outlet pressures or the differential pressure between the fluid inlet and outlet. The control program positions a four-way valve which may function as an adjustable metering orifice in response to the measured average flow rate and/or changes in the inlet and outlet pressures to achieve the desired flow rate. At the end of each stroke, the four-way valve is repositioned to reverse fluid flow through the metering cylinder. The system may revise the valve position settings for both forward and reverse strokes based on the measured time required for a full stroke at a certain valve position. In this way, the system automatically and iteratively compensates for changes in fluid properties and fluid pressure. A cleaning cycle which progressively opens the valve stepwise and may culminate in full open valve travel in both fluid flow directions is provided in the event of an obstruction of the valve orifice.
摘要翻译：用于正位移计量系统的控制程序测量已知体积的气缸中的自由活塞行进所需的时间，以确定活塞全行程期间的平均流量。系统还可以测量和记录入口和出口压力或流体入口和出口之间的压差。控制程序根据所测量的平均流量和/或入口压力和出口压力的变化来定位四通阀，该四通阀可用作可调整计量孔，以实现所需的流量。在每个行程结束时，四通阀重新定位，以逆流通过计量气缸的流体流动。系统可以根据在特定阀位上的全行程所需的测量时间来修正前进和后退行程的阀位置设置。以这种方式，系统自动和迭代地补偿流体性质和流体压力的变化。在阀孔堵塞的情况下，提供逐步逐渐打开阀的清洁循环，并且可以在两个流体流动方向上最终完全打开气门行程。

2. 发明申请

US20130180719A1 METHOD FOR AUTONOMOUS CONTROL OF A CHEMICAL INJECTION SYSTEM FOR OIL AND GAS WELLS 有权
公开(公告)号：US20130180719A1
公开(公告)日：2013-07-18
申请号：US13732999
申请日：2013-01-02
申请人： Robert E. Smith, IV , Maurice Slot , Richard R. Watson
发明人： Robert E. Smith, IV , Maurice Slot , Richard R. Watson
IPC分类号： E21B37/06
CPC分类号： E21B37/06 , E21B34/16 , E21B41/02 , G05B15/02 , G05D7/0635 , Y10T137/0368 , Y10T137/0379 , Y10T137/7759 , Y10T137/776 , Y10T137/7761
摘要： A control program for a positive displacement metering system measures the time required for the travel of a free piston in a cylinder of known volume to determine an average flow rate during a full stroke of the piston. The system may also measure and record the inlet and outlet pressures or the differential pressure between the fluid inlet and outlet. The control program positions a four-way valve which may function as an adjustable metering orifice in response to the measured average flow rate and/or changes in the inlet and outlet pressures to achieve the desired flow rate. At the end of each stroke, the four-way valve is repositioned to reverse fluid flow through the metering cylinder. The system may revise the valve position settings for both forward and reverse strokes based on the measured time required for a full stroke at a certain valve position. In this way, the system automatically and iteratively compensates for changes in fluid properties and fluid pressure. A cleaning cycle which progressively opens the valve stepwise and may culminate in full open valve travel in both fluid flow directions is provided in the event of an obstruction of the valve orifice.

3. 发明授权

US09255465B2 Method for autonomous control of a chemical injection system for oil and gas wells 有权
公开(公告)号：US09255465B2
公开(公告)日：2016-02-09
申请号：US11934513
申请日：2007-11-02
申请人： Robert E. Smith, IV , Maurice Slot , Richard R. Watson
发明人： Robert E. Smith, IV , Maurice Slot , Richard R. Watson
IPC分类号： G05D7/06 , E21B37/06 , E21B41/02
CPC分类号： E21B37/06 , E21B34/16 , E21B41/02 , G05B15/02 , G05D7/0635 , Y10T137/0368 , Y10T137/0379 , Y10T137/7759 , Y10T137/776 , Y10T137/7761
摘要： A control program for a positive displacement metering system measures the time required for the travel of a free piston in a cylinder of known volume to determine an average flow rate during a full stroke of the piston. The system may also measure and record the inlet and outlet pressures or the differential pressure between the fluid inlet and outlet. The control program positions a four-way valve which may function as an adjustable metering orifice in response to the measured average flow rate and/or changes in the inlet and outlet pressures to achieve the desired flow rate. At the end of each stroke, the four-way valve is repositioned to reverse fluid flow through the metering cylinder. The system may revise the valve position settings for both forward and reverse strokes based on the measured time required for a full stroke at a certain valve position. In this way, the system automatically and iteratively compensates for changes in fluid properties and fluid pressure. A cleaning cycle which progressively opens the valve stepwise and may culminate in full open valve travel in both fluid flow directions is provided in the event of an obstruction of the valve orifice.

4. 发明申请

US20090114391A1 METHOD FOR AUTONOMOUS CONTROL OF A CHEMICAL INJECTION SYSTEM FOR OIL AND GAS WELLS 有权
标题翻译：用于油气化学注入系统的自动控制方法
公开(公告)号：US20090114391A1
公开(公告)日：2009-05-07
申请号：US11934513
申请日：2007-11-02
申请人： ROBERT E. SMITH, IV , Maurice Slot , Richard R. Watson
发明人： ROBERT E. SMITH, IV , Maurice Slot , Richard R. Watson
IPC分类号： E21B43/16
CPC分类号： E21B37/06 , E21B34/16 , E21B41/02 , G05B15/02 , G05D7/0635 , Y10T137/0368 , Y10T137/0379 , Y10T137/7759 , Y10T137/776 , Y10T137/7761
摘要： A control program for a positive displacement metering system measures the time required for the travel of a free piston in a cylinder of known volume to determine an average flow rate during a full stroke of the piston. The system may also measure and record the inlet and outlet pressures or the differential pressure between the fluid inlet and outlet. The control program positions a four-way valve which may function as an adjustable metering orifice in response to the measured average flow rate and/or changes in the inlet and outlet pressures to achieve the desired flow rate. At the end of each stroke, the four-way valve is repositioned to reverse fluid flow through the metering cylinder. The system may revise the valve position settings for both forward and reverse strokes based on the measured time required for a full stroke at a certain valve position. In this way, the system automatically and iteratively compensates for changes in fluid properties and fluid pressure. A cleaning cycle which progressively opens the valve stepwise and may culminate in full open valve travel in both fluid flow directions is provided in the event of an obstruction of the valve orifice.
摘要翻译：用于正位移计量系统的控制程序测量已知体积的气缸中的自由活塞行进所需的时间，以确定活塞全行程期间的平均流量。系统还可以测量和记录入口和出口压力或流体入口和出口之间的压差。控制程序根据所测量的平均流量和/或入口压力和出口压力的变化来定位四通阀，该四通阀可用作可调整计量孔，以实现所需的流量。在每个行程结束时，四通阀重新定位，以逆流通过计量气缸的流体流动。系统可以根据在特定阀位上的全行程所需的测量时间来修正前进和后退行程的阀位置设置。以这种方式，系统自动和迭代地补偿流体性质和流体压力的变化。在阀孔堵塞的情况下，提供逐步逐渐打开阀的清洁循环，并且可以在两个流体流动方向上最终完全打开气门行程。

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