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公开(公告)号：WO2006034197A3
公开(公告)日：2007-01-25
申请号：PCT/US2005033490
申请日：2005-09-16
Applicant: LUFKIN IND INC
Inventor： BOYER LEMOYNE , DORADO DONEIL M
CPC classification number: F04B49/065 , F04B47/02 , F04B2201/121 , F04B2203/0204 , F04B2203/0207 , F04B2203/0209
Abstract: Rod Float Mitigation (RFM) methods for rod-pumped oil wells having a variable frequency drive which controls the speed of the motor for the pump. Each method monitors rod loads or a similar condition and takes action only when rod load drops below a predefined minimum load. A first method reduces the speed of the motor to a preset level. A second method fixes the torque level on the pump downstroke by adjusting motor speed based on a calculated gearbox torque compared to a programmed fixed limit. Another method includes a program in the variable frequency drive which includes a preferred RFM Torque Curve for the pump to follow on its downstroke. When rod float occurs, the program monitors gearbox torque and adjusts the speed to follow the predetermined RFM Torque Curve thereby mitigating rod float with minimum decrease in production.
Abstract translation: 用于控制泵的电机速度的变频驱动的杆式泵油井的杆浮子减轻（RFM）方法。 每种方法监测杆载荷或类似的条件，只有当杆载荷低于预定义的最小载荷时才采取措施。 第一种方法将电机的速度降低到预设的水平。 第二种方法通过根据计算的齿轮箱转矩与编程的固定极限相比调节电机转速来定义泵下行程序的转矩水平。 另一种方法包括可变频率驱动器中的程序，其包括用于泵跟随其下行程序的优选RFM扭矩曲线。 当发生杆浮子发生时，程序监控变速箱扭矩并调整速度以遵循预定的RFM扭矩曲线，从而以最小的生产减少减轻杆浮子。
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公开(公告)号：CA2639450C
公开(公告)日：2012-08-28
申请号：CA2639450
申请日：2008-09-10
Applicant: LUFKIN IND INC
Inventor： DORADO DONEIL M , WOOLSEY KELLY A
Abstract: A system and method for controlling the speed of a progressing cavity liquid well pump to increase liquid production from a well while avoiding operation of the well in a pumped-off state. A controller controls a variable speed drive to drive a progressing cavity liquid well pump at a set pump speed while measuring well and system parameters indicative of pumping performance and/or liquid production from the well. The set speed of the pump is changed in steps either increasingly or decreasingly by the controller, acting through the variable speed drive, in response to the measured well and system parameters. The controller, responsive to the measured well and system parameters, challenges the set pump speed by varying the set pump speed so as to increase the production from the well while avoiding pump and well operation in a pumped-off state.
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Patent Agency Ranking
公开(公告)号：CA2639450A1
公开(公告)日：2009-05-16
申请号：CA2639450
申请日：2008-09-10
Applicant: LUFKIN IND INC
Inventor： WOOLSEY KELLY A , DORADO DONEIL M
Abstract: A system and method for controlling the speed of a progressing cavity liquid well pump to increase liquid production from a well while avoiding operation of the we ll in a pumped-off state. A controller controls a variable speed drive to drive a progressing cavity liquid well pump at a set pump speed while measuring well and system parameters indicative of pumping performance and/or liquid production from the well. The set speed of the pum p is changed in steps either increasingly or decreasingly by the controller, acting through the variable speed drive, in response to the measured well and system parameters. The controlle r, responsive to the measured well and system parameters, challenges the set pump speed by varyin g the set pump speed so as to increase the production from the well while avoiding pump and well operation in a pumped-off state.
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公开(公告)号：CA2628660A1
公开(公告)日：2008-10-09
申请号：CA2628660
申请日：2008-04-09
Applicant: LUFKIN IND INC
Inventor： OESTREICH ERIC S , PINNELL DAVID L , DORADO DONEIL M , ROBERSON ALAN L
Abstract: An apparatus and method for well control and monitoring including an independent web server computer integrated with a pump controller located at each well in an oil field. The well controller locally controls the well pump, processes well and pump data, generates surface and downhole cards, and communicates production reports, recommendations for production improvements, and production statistics to remote sites via the internet. The controller can be queried remotely to provide production reports, etc. Furthermore, the controller can initiate alerts via email, text messaging, or internet messaging, for example, during fault conditions.
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公开(公告)号：CA2628660C
公开(公告)日：2017-07-11
申请号：CA2628660
申请日：2008-04-09
Applicant: LUFKIN IND INC
Inventor： ROBERSON ALAN L , DORADO DONEIL M , PINNELL DAVID L , OESTREICH ERIC S
Abstract: An apparatus and method for well control and monitoring including an independent web server computer integrated with a pump controller located at each well in an oil field. The well controller locally controls the well pump, processes well and pump data, generates surface and downhole cards, and communicates production reports, recommendations for production improvements, and production statistics to remote sites via the internet. The controller can be queried remotely to provide production reports, etc. Furthermore, the controller can initiate alerts via email, text messaging, or internet messaging, for example, during fault conditions.
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公开(公告)号：CA2580626C
公开(公告)日：2013-01-15
申请号：CA2580626
申请日：2005-09-16
Applicant: LUFKIN IND INC
Inventor： BOYER LEMOYNE , DORADO DONEIL M
Abstract: Rod Float Mitigation (RFM) methods for rod-pumped oil wells having a variable frequency drive which controls the speed of the motor for the pump. Each method monitors rod loads or a similar condition and takes action only when rod load drops below a predefined minimum load. A first method reduces the speed of the motor to a preset level. A second method fixes the torque level on the pump downstroke by adjusting motor speed based on a calculated gearbox torque compared to a programmed fixed limit. Another method includes a program in the variable frequency drive which includes a preferred RFM Torque Curve for the pump to follow on its downstroke. When rod float occurs, the program monitors gearbox torque and adjusts the speed to follow the predetermined RFM Torque Curve thereby mitigating rod float with minimum decrease in production.
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公开(公告)号：CA2580626A1
公开(公告)日：2006-03-30
申请号：CA2580626
申请日：2005-09-16
Applicant: LUFKIN IND INC
Inventor： BOYER LEMOYNE , DORADO DONEIL M
Abstract: Rod Float Mitigation (RFM) methods for rod-pumped oil wells having a variable frequency drive which controls the speed of the motor for the pump. Each method monitors rod loads or a similar condition and takes action only when rod load drops below a predefined minimum load. A first method reduces the speed of the motor to a preset level. A second method fixes the torque level on the pump downstroke by adjusting motor speed based on a calculated gearbox torque compared to a programmed fixed limit. Another method includes a program in the variable frequency drive which includes a preferred RFM Torque Curve for the pump to follow on its downstroke. When rod float occurs, the program monitors gearbox torque and adjusts the speed to follow the predetermined RFM Torque Curve thereby mitigating rod float with minimum decrease in production.
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