CA2614817A1 - Rod pump control system including parameter estimator - Google Patents
Rod pump control system including parameter estimator Download PDFInfo
- Publication number
- CA2614817A1 CA2614817A1 CA002614817A CA2614817A CA2614817A1 CA 2614817 A1 CA2614817 A1 CA 2614817A1 CA 002614817 A CA002614817 A CA 002614817A CA 2614817 A CA2614817 A CA 2614817A CA 2614817 A1 CA2614817 A1 CA 2614817A1
- Authority
- CA
- Canada
- Prior art keywords
- rod
- pump
- velocity
- values
- load
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000012530 fluid Substances 0.000 claims abstract 10
- 238000000034 method Methods 0.000 claims 24
- 238000004088 simulation Methods 0.000 claims 12
- 238000005086 pumping Methods 0.000 abstract 2
- 230000003247 decreasing effect Effects 0.000 abstract 1
Landscapes
- Control Of Positive-Displacement Pumps (AREA)
Abstract
A rod pump control system includes a parameter estimator that determines from motor data parameters relating to operation of the rod pump and/or downhole dynamometer card without the need for external instrumentation, such as down hole sensors, rod load sensors, flow sensors, acoustic fluid level sensors, etc. In one embodiment, instantaneous motor current and voltage together with pump parameters are used in determining rod position and load. The rod position and load are used to control the operation of the rod pump to optimize the operation of the pump. Also disclosed in a pump stroke amplifier that is capable of increasing pump stroke without changing the overall pumping speed, or in the alternative, maintaining the well output with decreased overall pumping speed.
Claims (30)
1. A method of optimizing the performance of a rod pump used for transferring fluid within a fluid system, the rod pump including a rod string carrying a downhole pump, and a variable drive coupled to the rod string for reciprocating the rod string within the fluid system, the method comprising the steps of:
determining torque and velocity inputs to the rod pump;
using the torque and velocity inputs to calculate values for one or more operating parameters for the rod pump;
using one or more of the operating parameter values to produce command signals; and using the command signals to vary the velocity of the downhole pump to cause the downhole pump to closely follow the polished rod position while limiting tensile and compressive forces excursions in rod load as the rod string is being reciprocated.
determining torque and velocity inputs to the rod pump;
using the torque and velocity inputs to calculate values for one or more operating parameters for the rod pump;
using one or more of the operating parameter values to produce command signals; and using the command signals to vary the velocity of the downhole pump to cause the downhole pump to closely follow the polished rod position while limiting tensile and compressive forces excursions in rod load as the rod string is being reciprocated.
2. The method according to claim 1, wherein determining torque and velocity inputs includes the steps of:
measuring electrical voltage applied to a drive motor of the variable drive and electrical current drawn by the drive motor; and using the measured values of electrical voltage and current to calculate values of motor torque and motor velocity for the drive motor.
measuring electrical voltage applied to a drive motor of the variable drive and electrical current drawn by the drive motor; and using the measured values of electrical voltage and current to calculate values of motor torque and motor velocity for the drive motor.
3. A method of controlling the performance of a rod pump used for transferring fluid within a fluid system, the rod pump including a rod string carrying a downhole pump, the rod string including a polished rod, the method comprising the steps of:
determining values of torque and velocity inputs to the pump;
using the torque and velocity values to calculate values for one or more operating parameters for the rod pump;
using one or more of the operating parameter values to produce command signals; and using the command signals to vary the velocity of the pump to at least limit excursions in rod load to preset limits.
determining values of torque and velocity inputs to the pump;
using the torque and velocity values to calculate values for one or more operating parameters for the rod pump;
using one or more of the operating parameter values to produce command signals; and using the command signals to vary the velocity of the pump to at least limit excursions in rod load to preset limits.
4. The method according to claim 3, wherein the operating parameters include at least one of rod load, rod position and rod velocity.
5. The method according to claim 3, wherein using the operating parameter values to produce command signals includes the steps of obtaining a value representing rod load;
obtaining a value representing rod position;
using the values of rod load and rod-position to obtain an estimate of the velocity of the downhole pump; and using the difference between the rod velocity and the downhole pump velocity in producing the command signals.
obtaining a value representing rod position;
using the values of rod load and rod-position to obtain an estimate of the velocity of the downhole pump; and using the difference between the rod velocity and the downhole pump velocity in producing the command signals.
6. The method according to claim 4, wherein using the operating parameter values to produce command signals includes the step of obtaining an estimate of velocity of the downhole pump using at least the value of rod load.
7. The method according to claim 6, wherein obtaining an estimate of velocity of the downhole pump includes using at least rod load along with a simulation model to predict the velocity of the downhole pump.
8. The method according to claim 7, wherein the simulation model is based on a multi-section model of the rod string.
9. The method according to claim 7, wherein the simulation model is based on a wave equation model of the rod string.
10. The method according to claim 7, wherein the simulation model is based on a single section model of the rod string.
11. The method according to claim 4, wherein using the operating parameter values to produce command signals includes the steps of using one or more of the operating parameter values to calculate a value representing rod load and comparing the rod load value with preset upper and lower load limit values.
12. The method according to claim 3, wherein determining torque and velocity inputs includes the steps of:
measuring electrical voltage applied to a drive motor of the variable drive and electrical current drawn by the drive motor; and using the measured values of electrical voltage and current to calculate values of motor torque and motor velocity for the drive motor.
measuring electrical voltage applied to a drive motor of the variable drive and electrical current drawn by the drive motor; and using the measured values of electrical voltage and current to calculate values of motor torque and motor velocity for the drive motor.
13. A method of controlling the performance of a rod pump used for transferring fluid within a fluid system, the rod pump including a rod string carrying a downhole pump, and a variable drive including an electrical drive motor coupled to the rod string for reciprocating the rod string; the method comprising the steps of:
measuring electrical voltage applied to the drive motor and electrical current drawn by the drive motor;
using the measured values of electrical voltage applied to the drive motor and current drawn by the drive motor to calculate values of motor torque and motor velocity for the drive motor;
using the values of motor torque and motor velocity to calculate values representing operating parameters for the rod pump;
using one or more of the operating parameter values to produce command signals; and using the command signals to vary the velocity of the downhole pump to cause the downhole pump to closely follow the polished rod position while limiting tensile and compressive forces excursions in rod load as the rod string is being reciprocated.
measuring electrical voltage applied to the drive motor and electrical current drawn by the drive motor;
using the measured values of electrical voltage applied to the drive motor and current drawn by the drive motor to calculate values of motor torque and motor velocity for the drive motor;
using the values of motor torque and motor velocity to calculate values representing operating parameters for the rod pump;
using one or more of the operating parameter values to produce command signals; and using the command signals to vary the velocity of the downhole pump to cause the downhole pump to closely follow the polished rod position while limiting tensile and compressive forces excursions in rod load as the rod string is being reciprocated.
14. The method according to claim 13, wherein the operating parameters include at least one of rod load, rod position and rod velocity.
15. The method according to claim 13, wherein using the operating parameter values to produce command signals includes the steps of obtaining a value representing rod load;
obtaining a value representing rod position;
using the values of rod load and rod position to obtain an estimate of the velocity of the downhole pump; and using the difference between the rod velocity and the downhole pump velocity in producing the command signals.
obtaining a value representing rod position;
using the values of rod load and rod position to obtain an estimate of the velocity of the downhole pump; and using the difference between the rod velocity and the downhole pump velocity in producing the command signals.
16. The method according to claim 14, wherein using the operating parameter values to produce command signals includes the step of obtaining an estimate of velocity of the downhole pump using at least the value of rod load.
17. The method according to claim 16, wherein obtaining an estimate of velocity of the downhole pump includes using at least rod load along with a simulation model to predict the velocity of the downhole pump.
18. The method according to claim 17, wherein the simulation model is based on a multi-section model of the rod string.
19. The method according to claim 17, wherein the simulation model is based on a wave equation model of the rod string.
20. The method according to claim 17, wherein the simulation model is based on a single section model of the rod string.
21. The method according to claim 14, wherein using the operating parameter values to produce command signals includes the steps of using one or more of the operating parameter values to calculate a value representing rod load and comparing the rod load value with preset upper and lower load limit values.
22. A pump control system for controlling the performance of a rod pump used for transferring fluid within a fluid system, the rod pump including a rod string carrying a downhole pump that is reciprocated, the pump system comprising:
means for determining values of torque and velocity inputs to the pump;
means for using the torque and velocity values to calculate values for one or more operating parameters for the rod pump;
means for using one or more of the operating parameter values to produce command signals for controlling the pump to vary the velocity of the pump to limit excursions in rod load to preset limits.
means for determining values of torque and velocity inputs to the pump;
means for using the torque and velocity values to calculate values for one or more operating parameters for the rod pump;
means for using one or more of the operating parameter values to produce command signals for controlling the pump to vary the velocity of the pump to limit excursions in rod load to preset limits.
23. The pump control system according to claim 22, wherein the means for using the operating parameter values to produce command signals includes means for obtaining a value representing rod load; means for obtaining a value representing rod position; means for using the values of rod load and rod position to obtain an estimate of the velocity of the downhole pump; and means for using the difference between the rod velocity and the downhole pump velocity in producing the command signals.
24. The pump control system according to claim 23, including a simulation model for obtaining an estimate of velocity of the downhole pump.
25. The pump control system according to claim 24, wherein the simulation model is based on a multi-section model of the rod string.
26. The pump control system according to claim 24, wherein the simulation model is based on a wave equation model of the rod string.
27. The pump control system according to claim 24, wherein the simulation model is based on a single section model of the rod string.
28. The pump control system according to claim 22, wherein the means for using the operating parameter values to produce command signals includes means for using one or more of the operating parameter values to calculate a value representing rod load and means for comparing the rod load value with preset upper and lower load limit values.
29. The pump control system according to claim 22, wherein determining torque and velocity inputs includes the steps of:
measuring electrical voltage applied to a drive motor of the variable drive and electrical current drawn by the drive motor; and using the measured values of electrical voltage and current to calculate values of motor torque and motor velocity for the drive motor.
measuring electrical voltage applied to a drive motor of the variable drive and electrical current drawn by the drive motor; and using the measured values of electrical voltage and current to calculate values of motor torque and motor velocity for the drive motor.
30. The pump control system according to claim 22, wherein the means for determining torque and velocity inputs to the pump includes sensors for measuring the electrical voltages applied to the motor and currents drawn by the motor and means for using the measured values of electrical voltages applied to the motor and currents drawn by the motor to calculate values of torque and velocity produced by the motor.
Applications Claiming Priority (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US41419702P | 2002-09-27 | 2002-09-27 | |
| US60/414,197 | 2002-09-27 | ||
| US42915802P | 2002-11-26 | 2002-11-26 | |
| US60/429,158 | 2002-11-26 | ||
| US10/655,777 | 2003-09-05 | ||
| US10/655,777 US7168924B2 (en) | 2002-09-27 | 2003-09-05 | Rod pump control system including parameter estimator |
| CA002443010A CA2443010C (en) | 2002-09-27 | 2003-09-26 | Rod pump control system including parameter estimator |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002443010A Division CA2443010C (en) | 2002-09-27 | 2003-09-26 | Rod pump control system including parameter estimator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2614817A1 true CA2614817A1 (en) | 2004-03-27 |
| CA2614817C CA2614817C (en) | 2010-03-23 |
Family
ID=39367231
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2614817A Expired - Lifetime CA2614817C (en) | 2002-09-27 | 2003-09-26 | Rod pump control system including parameter estimator |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2614817C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10428629B2 (en) | 2014-12-30 | 2019-10-01 | Yueli Electric (Jiangsu) Co., Ltd. | Methods and systems for directly driving a beam pumping unit by a rotating motor |
| CN112630464A (en) * | 2020-12-01 | 2021-04-09 | 西南石油大学 | Device and method for testing falling instantaneous speed of plunger in wells with different slopes |
| EP3816444A1 (en) * | 2019-10-30 | 2021-05-05 | Siemens Energy Austria GmbH | Method for determining operating properties of a rod borehole pump and pump system for same |
| CN117166971A (en) * | 2023-09-15 | 2023-12-05 | 大庆石油管理局有限公司 | Automatic counterweight adjusting device for tower type pumping unit |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101305187B (en) | 2005-10-13 | 2010-12-08 | 井泵技术有限公司 | System and method for optimizing down-hole fluid yield |
-
2003
- 2003-09-26 CA CA2614817A patent/CA2614817C/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10428629B2 (en) | 2014-12-30 | 2019-10-01 | Yueli Electric (Jiangsu) Co., Ltd. | Methods and systems for directly driving a beam pumping unit by a rotating motor |
| EP3816444A1 (en) * | 2019-10-30 | 2021-05-05 | Siemens Energy Austria GmbH | Method for determining operating properties of a rod borehole pump and pump system for same |
| WO2021083953A1 (en) * | 2019-10-30 | 2021-05-06 | Siemens Ag Österreich | Method for determining operating properties of a drill-rod borehole pump, and pump system for same |
| CN112630464A (en) * | 2020-12-01 | 2021-04-09 | 西南石油大学 | Device and method for testing falling instantaneous speed of plunger in wells with different slopes |
| CN117166971A (en) * | 2023-09-15 | 2023-12-05 | 大庆石油管理局有限公司 | Automatic counterweight adjusting device for tower type pumping unit |
| CN117166971B (en) * | 2023-09-15 | 2024-03-15 | 大庆石油管理局有限公司 | Automatic counterweight adjusting device for tower type pumping unit |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2614817C (en) | 2010-03-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2443010A1 (en) | Rod pump control system including parameter estimator | |
| RU2381384C1 (en) | Method and system to control rod travel in system pumping fluid out of well | |
| AU2003240330B2 (en) | Reciprocating Pump Control System | |
| US9353617B2 (en) | Apparatus and method of referencing a sucker rod pump | |
| CA2394071A1 (en) | Virtual sensors to provide expanded downhole instrumentation for electrical submersible pumps (esps) | |
| US11613974B2 (en) | Dynamic power optimization system and method for electric submersible motors | |
| CN109372832B (en) | Energy consumption optimization method for bivariate hydraulic system under working condition change | |
| CA2614817A1 (en) | Rod pump control system including parameter estimator | |
| CN106406093A (en) | Ultrasonic motor servo control system asymmetric hysteretic compensation control device and method | |
| CN103560744B (en) | A kind of speed change based on power prediction drags optimization of profile control method | |
| RU2003110251A (en) | METHOD OF OPERATION OF A WELL BETWEEN A SUBMERSIBLE ELECTRIC PUMP WITH A FREQUENCY-REGULATED DRIVE | |
| US20230098068A1 (en) | Well pump control system and method | |
| CN114382447A (en) | Intelligent control method and device for intermittent pumping of pumping unit | |
| CN118110467A (en) | Method for judging execution of opening adjustment action of underground hydraulic control sliding sleeve | |
| CN117454591A (en) | Hydraulic oscillator placement position optimization method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKEX | Expiry |
Effective date: 20230926 |