CN111637044B - Electric submersible plunger pump oil well working condition diagnosis method and system - Google Patents
Electric submersible plunger pump oil well working condition diagnosis method and system Download PDFInfo
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- CN111637044B CN111637044B CN201910155044.4A CN201910155044A CN111637044B CN 111637044 B CN111637044 B CN 111637044B CN 201910155044 A CN201910155044 A CN 201910155044A CN 111637044 B CN111637044 B CN 111637044B
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- 239000003129 oil well Substances 0.000 title claims abstract description 70
- 238000000034 method Methods 0.000 title claims abstract description 54
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B47/00—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
- F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B51/00—Testing machines, pumps, or pumping installations
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Abstract
The invention provides an electric submersible plunger pump oil well working condition diagnosis method and system, wherein the method comprises the following steps: obtaining an electrical diagram parameter according to the electrical parameter of the electric submersible plunger pump when the oil well works; removing zero crossing points in the electric diagram parameters to obtain corrected electric diagram parameters; the invention can solve the problem of fault and accident diagnosis of the electric submersible plunger pump in the working process of an oil well.
Description
Technical Field
The invention relates to the technical field of rodless oil extraction, in particular to an electric submersible plunger pump oil well working condition diagnosis method and system.
Background
Along with the rapid growth of inclined wells and cluster wells, the eccentric wear of rod pipes in a rod lifting mode is serious, the pump detection period is shortened, and meanwhile, the energy consumption utilization rate of a rod lifting system is low. The electric submersible plunger pump is used as a novel rodless lifting system and is more and more widely applied, and the lifting mode does not use a sucker rod and directly places a linear motor underground to directly drive an oil well pump to pump oil in a reciprocating manner. After the electric submersible plunger pump is adopted, the maintenance cost of an oil well is greatly reduced, the energy-saving effect is obvious, and the electric submersible plunger pump has a good application prospect and is a development direction of a future oil field lifting process.
The traditional sucker rod pump well judges the working condition of the oil well by acquiring the indicator diagram of a wellhead polished rod, and the electric submersible plunger pump oil well cannot acquire the indicator diagram of the underground plunger pump at the wellhead because of no sucker rod, can only acquire the electric parameters of a wellhead power distribution cabinet on site, has unobvious curve characteristics of the electric parameters, lacks a corresponding working condition diagnosis method, and cannot quickly diagnose the working condition of the oil well by site technicians.
Disclosure of Invention
The invention aims to provide an oil well working condition diagnosis method for an electric submersible plunger pump, which solves the problem of fault and accident diagnosis of the electric submersible plunger pump in the working process of an oil well. Another object of the present invention is to provide an electric submersible plunger pump well condition diagnostic system. It is a further object of this invention to provide such a computer apparatus. It is a further object of this invention to provide such a readable medium.
In order to achieve the purpose, the invention discloses a method for diagnosing the working condition of an oil well with an electric submersible plunger pump on one hand, which comprises the following steps:
obtaining an electrical diagram parameter according to the electrical parameter of the electric submersible plunger pump when the oil well works;
removing zero crossing points in the electric diagram parameters to obtain corrected electric diagram parameters;
and forming an electric power diagram according to the corrected electric power diagram parameters so as to diagnose the working condition of the electric submersible plunger pump.
Preferably, the electrical parameters of the electric submersible plunger pump comprise three-phase current, three-phase voltage, three-phase active power and three-phase reactive power of the electric submersible plunger pump.
Preferably, the obtaining of the electrical diagram parameters according to the electrical parameters of the electric submersible plunger pump during the operation of the oil well specifically comprises:
obtaining the speed and time relation of the electric submersible plunger pump according to the electrical parameters;
obtaining the relation between the displacement and the time of the electric submersible plunger pump according to the relation between the speed and the time of the electric submersible plunger pump;
and obtaining the relation between the power and the time of the electric submersible plunger pump according to the three-phase active power of the electric parameter.
Preferably, the removing zero-crossing points in the electrical diagram parameters to obtain corrected electrical diagram parameters specifically includes:
and respectively removing the data with zero displacement in the displacement and time relation and the data with zero power in the power and time relation to obtain the corrected electric diagram parameters.
Preferably, the forming an electrical diagram according to the corrected electrical diagram parameters specifically includes:
and forming a power-displacement electric power diagram of the electric submersible plunger pump in a stroke cycle according to the corrected electric power diagram parameters.
Preferably, the method further comprises the step of obtaining electrical parameters of the electric submersible plunger pump while the well is in operation.
Preferably, the operating condition diagnosis of the electric submersible plunger pump specifically includes:
and comparing the electric work diagram with the electric work standard diagram of the electric submersible plunger pump under different working conditions to obtain the working condition of the electric submersible plunger pump.
The invention also discloses an electric submersible plunger pump oil well working condition diagnosis system, which comprises:
the parameter processing unit is used for obtaining an electric diagram parameter according to the electric parameter of the electric submersible plunger pump when the oil well works;
the parameter correcting unit is used for removing zero crossing points in the electric diagram parameters to obtain corrected electric diagram parameters;
and the electric work graph forming unit is used for forming an electric work graph according to the corrected electric work graph parameters so as to diagnose the working condition of the electric submersible plunger pump.
Preferably, the electrical parameters of the electric submersible plunger pump comprise three-phase current, three-phase voltage, three-phase active power and three-phase reactive power of the electric submersible plunger pump.
Preferably, the parameter processing unit is specifically configured to obtain a speed-time relationship of the electric submersible plunger pump according to the electrical parameter, obtain a displacement-time relationship of the electric submersible plunger pump according to the speed-time relationship of the electric submersible plunger pump, and obtain a power-time relationship of the electric submersible plunger pump according to the three-phase active power of the electrical parameter.
Preferably, the parameter correction unit is specifically configured to remove data with zero displacement in the relationship between displacement and time and data with zero power in the relationship between power and time to obtain the corrected electrical diagram parameters.
Preferably, the electric power diagram forming unit is specifically configured to form a power-displacement electric power diagram of the electric submersible plunger pump in one stroke cycle according to the corrected electric power diagram parameters.
Preferably, the system further comprises a parameter acquisition unit;
the parameter acquisition unit is used for acquiring the electric parameters of the electric submersible plunger pump during the working of the oil well.
Preferably, the system further comprises an analytical diagnostic unit;
and the analysis and diagnosis unit is used for comparing the electric power diagram with the electric power standard diagram of the electric submersible plunger pump under different working conditions to obtain the working condition of the electric submersible plunger pump.
The invention also discloses a computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the method when executing the program.
The invention also discloses a computer-readable medium, on which a computer program is stored which, when executed by a processor, implements a method as described above.
The invention obtains the electric parameter of the electric submersible plunger pump when the oil well works and obtains the electric diagram parameter for forming the electric diagram of the electric submersible plunger pump based on the electric parameter. And the parameters of the electric work diagram are corrected according to the working characteristics of the electric submersible plunger pump in the oil well, and the zero crossing points in the parameters of the electric work diagram are removed, so that the electric work diagram can be formed according to the corrected parameters of the electric work diagram. Through calculation and correction of the electric diagram parameters, the formed electric diagram of the electric submersible plunger pump can better reflect the working characteristics of the electric submersible plunger pump in an oil well, so that the working condition of the electric submersible plunger pump in the oil well can be accurately evaluated. The well mouth electric power curve measured on site is converted into an active diagram familiar to field technicians, and a more intuitive and more accurate evaluation scheme for the working condition of the electric submersible plunger pump is provided so as to guide production management and optimization adjustment of an oil well.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 shows one of the flow charts of one embodiment of the method for diagnosing the working condition of the oil well with the electric submersible plunger pump of the invention;
FIG. 2 illustrates a second flow chart of an embodiment of the method for diagnosing the well condition of the electric submersible plunger pump according to the present invention;
FIG. 3 is a third flow chart of an embodiment of the method for diagnosing the condition of an oil well with an electric submersible plunger pump according to the present invention;
FIG. 4 is a fourth flowchart of an embodiment of the method for diagnosing the condition of an oil well with an electric submersible plunger pump according to the present invention;
FIG. 5 is a flow chart showing a fifth embodiment of the method for diagnosing the working condition of the oil well with the electric submersible plunger pump according to the present invention;
FIG. 6 shows a sixth flowchart of an embodiment of the method for diagnosing the condition of an oil well with an electric submersible plunger pump according to the present invention;
FIG. 7 is a graph of power versus time illustrating one embodiment of the method for diagnosing conditions in an oil well using an electric submersible plunger pump according to the present invention;
FIG. 8 is a graph of displacement versus time illustrating one embodiment of the method for diagnosing oil well conditions using an electric submersible plunger pump of the present invention;
FIG. 9 shows an active graph formed without modification of active graph parameters;
FIG. 10 illustrates an active diagram formed by modifying the parameters of the active diagram according to the present invention;
FIG. 11 is a block diagram illustrating one embodiment of an electrical submersible plunger pump well condition diagnostic system according to the present invention;
FIG. 12 illustrates a second block diagram of an embodiment of the electrical submersible plunger pump well condition diagnostic system of the present invention;
FIG. 13 shows a schematic block diagram of a computer device suitable for use in implementing embodiments of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The problem that the indicator diagram of the underground plunger pump cannot be collected at a wellhead because the electric submersible plunger pump oil well has no sucker rod is solved. The embodiment of the invention discloses an oil well working condition diagnosis method of an electric submersible plunger pump. In this embodiment, as shown in fig. 1, the method includes:
s100: and obtaining the parameters of the electric diagram according to the electric parameters of the electric submersible plunger pump when the oil well works.
S200: and removing zero crossing points in the electric function diagram parameters to obtain the corrected electric function diagram parameters.
S300: and forming an electric power diagram according to the corrected electric power diagram parameters so as to diagnose the working condition of the electric submersible plunger pump.
The invention obtains the electric parameter of the electric submersible plunger pump when the oil well works and obtains the electric diagram parameter for forming the electric diagram of the electric submersible plunger pump based on the electric parameter. And the parameters of the electric work diagram are corrected according to the working characteristics of the electric submersible plunger pump in the oil well, and the zero crossing points in the parameters of the electric work diagram are removed, so that the electric work diagram can be formed according to the corrected parameters of the electric work diagram. Through calculation and correction of the electric diagram parameters, the formed electric diagram of the electric submersible plunger pump can better reflect the working characteristics of the electric submersible plunger pump in an oil well, so that the working condition of the electric submersible plunger pump in the oil well can be accurately evaluated. The well mouth electric power curve measured on site is converted into an active diagram familiar to field technicians, a more intuitive and more accurate evaluation scheme for the working condition of the electric submersible plunger pump is provided, and the quick diagnosis of the working condition of the electric submersible plunger pump oil well is realized so as to guide the production management and the optimized adjustment of the oil well.
In a preferred embodiment, the electrical parameters of the electric submersible plunger pump may include parameters of three-phase current, three-phase voltage, three-phase active power and three-phase reactive power of the electric submersible plunger pump. The state of the electric submersible plunger pump in the oil well can be obtained through the electric parameters of the electric submersible plunger pump, and the parameters such as the speed, the displacement and the like of the electric submersible plunger pump are obtained.
In a preferred embodiment, as shown in fig. 2, the S100 may specifically include:
s110: and obtaining the speed and time relation of the electric submersible plunger pump according to the electrical parameters. The motion speed rule of the electric submersible plunger pump can be obtained through the electric parameters of the electric submersible plunger pump, and the relation between the speed and the time in the oil well of the electric submersible plunger pump can be obtained.
In one specific example, the operation of the electric submersible plunger pump in the oil well is divided into two processes, an upstroke and a downstroke.
The speed and time relation of the electric submersible plunger pump in the upstroke can be calculated by the following formula:
the speed of the electric submersible plunger pump on the downstroke versus time can be calculated by the following formula:
wherein, t0Acceleration time or deceleration time, s; t is a period including an up stroke and a down stroke, s; w is the circle frequency; s is the stroke distance, m; n is stroke number, min-1(ii) a b is a coefficient of motion, b is
S120: and obtaining the relation between the displacement and the time of the electric submersible plunger pump according to the relation between the speed and the time of the electric submersible plunger pump. For example, the displacement versus time relationship of an electric submersible plunger pump may be obtained by integrating the speed versus time relationship.
S130: and obtaining the relation between the power and the time of the electric submersible plunger pump according to the three-phase active power of the electric parameter. For example, when the electrical parameter includes three-phase active power, the power-time relationship of the electric submersible plunger pump can be obtained according to the change of the three-phase active power on the time line.
In a preferred embodiment, as shown in fig. 3, the S200 may specifically include:
s210: and respectively removing the data with zero displacement in the displacement and time relation and the data with zero power in the power and time relation to obtain the corrected electric diagram parameters. According to the working characteristics of the electric submersible plunger pump, the electric submersible plunger pump works in an oil well and comprises an upstroke and a downstroke. A small section of the motor stops after the top dead center of the upper stroke is finished, and the motor stops for a period of time after the bottom dead center of the lower stroke is finished. In the shutdown process, the speed of the electric submersible plunger pump is zero, no effective displacement exists, and the power is also zero.
An active diagram directly formed through the calculated parameters of the electric diagram can be influenced by the shutdown state of the electric submersible plunger pump and has a zero crossing point, and in the process of curve fitting, due to the influence of the zero crossing point, data of an active diagram curve near the zero crossing point can be deviated, so that the judgment of the working condition of the electric submersible plunger pump and the fault diagnosis of accidents are influenced.
In order to better diagnose the real working condition of the electric submersible plunger pump, the calculated active diagram parameters need to be corrected. The corrected electric diagram parameters are obtained by respectively removing the data of zero displacement in the displacement-time relation and the data of zero power in the power-time relation, the active diagram is formed according to the corrected active diagram parameters, the influence of zero crossing points can be avoided, and a closed and smooth active diagram curve, namely a power-displacement curve of the active diagram conforming to the actual working condition is formed, so that the working condition of the electric submersible plunger pump can be more intuitively and accurately diagnosed, and the diagnosis accuracy is improved.
In a preferred embodiment, as shown in fig. 4, the S300 may specifically include:
s310: and forming a power-displacement electric power diagram of the electric submersible plunger pump in a stroke cycle according to the corrected electric power diagram parameters. Specifically, an electric diagram of one stroke cycle of the electric submersible plunger pump is drawn by taking the displacement of the electric submersible plunger pump as an abscissa and the active power of a motor of the electric submersible plunger pump as an ordinate, so that points representing the displacement and the power of the electric submersible plunger pump are fitted to form a closed and smooth electric diagram curve.
In a preferred embodiment, as shown in fig. 5, the S300 further may include:
s320: and comparing the electric work diagram with the electric work standard diagram of the electric submersible plunger pump under different working conditions to obtain the working condition of the electric submersible plunger pump. The formed electric power diagram is compared with the corresponding electric power standard diagrams of the electric submersible plunger pump under different working conditions, and the working condition of the electric submersible plunger pump represented by the current active diagram is determined, so that whether the working state of the electric submersible plunger pump is correct or not is judged, whether the electric submersible plunger pump breaks down or not can be monitored in real time, and safety accidents are avoided. It can be understood that the comparison between the formed electric power diagram and the electric power standard diagram under different working conditions may be implemented manually, or may be implemented by data processing equipment such as a computer, and the present invention is not limited thereto. If the comparison is carried out by adopting the computer, the deviation between the power-displacement curve of the active diagram and the power-displacement curve of the active standard diagram under one working condition is within a preset deviation range, the formed active diagram is considered to be successfully compared with the active standard diagram under the one working condition, and the working condition of the electric submersible plunger pump is the same as the one working condition.
In a preferred embodiment, as shown in fig. 6, the method may further include a step S000 of acquiring an electrical parameter of the electric submersible plunger pump while the oil well is in operation, before the step S100. The electrical parameters such as current, voltage, active power and reactive power of the submersible plunger pump in the well can be acquired by an electrical parameter tester.
In one specific example, the power of the electric submersible plunger pump versus time may be derived from the obtained electrical parameters, as shown in FIG. 7. Further, the displacement of the electric submersible plunger pump can be calculated according to the electric parameters, and the relation between the displacement and the time is obtained, and is shown in fig. 8. The displacement of the electric submersible plunger pump is used as an abscissa, and the active power of the motor is used as an ordinate, so that an active diagram of a stroke cycle can be drawn. Fig. 9 and fig. 10 respectively show an active diagram formed by the active diagram parameters without correction and after correction, fig. 9 is affected by a zero crossing point, a formed closed curve has a sudden change at the zero crossing point, and the working state of the electric submersible plunger pump cannot be accurately represented, and the active diagram formed by the corrected active diagram parameters is a smooth closed curve, so that the working condition of the electric submersible plunger pump in an oil well can be more accurately reflected.
Based on the same principle, the embodiment also discloses an electric submersible plunger pump oil well working condition diagnosis system. As shown in fig. 11, the system includes a parameter processing unit 11, a parameter correcting unit 12, and an electrical function pattern forming unit 13.
The parameter processing unit 11 is configured to obtain an electrical diagram parameter according to an electrical parameter of the electrical submersible plunger pump during operation of the oil well.
The parameter correcting unit 12 is configured to remove a zero crossing point in the electrical diagram parameter to obtain a corrected electrical diagram parameter.
The electric work graph forming unit 13 is used for forming an electric work graph according to the corrected electric work graph parameters so as to diagnose the working condition of the electric submersible plunger pump.
The invention obtains the electric parameter of the electric submersible plunger pump when the oil well works and obtains the electric diagram parameter for forming the electric diagram of the electric submersible plunger pump based on the electric parameter. And the parameters of the electric work diagram are corrected according to the working characteristics of the electric submersible plunger pump in the oil well, and the zero crossing points in the parameters of the electric work diagram are removed, so that the electric work diagram can be formed according to the corrected parameters of the electric work diagram. Through calculation and correction of the electric diagram parameters, the formed electric diagram of the electric submersible plunger pump can better reflect the working characteristics of the electric submersible plunger pump in an oil well, so that the working condition of the electric submersible plunger pump in the oil well can be accurately evaluated. The well mouth electric power curve measured on site is converted into an active diagram familiar to field technicians, a more intuitive and more accurate evaluation scheme for the working condition of the electric submersible plunger pump is provided, and the quick diagnosis of the working condition of the electric submersible plunger pump oil well is realized so as to guide the production management and the optimized adjustment of the oil well.
In a preferred embodiment, the electrical parameters of the electric submersible plunger pump may include parameters of three-phase current, three-phase voltage, three-phase active power and three-phase reactive power of the electric submersible plunger pump. The state of the electric submersible plunger pump in the oil well can be obtained through the electric parameters of the electric submersible plunger pump, and the parameters such as the speed, the displacement and the like of the electric submersible plunger pump are obtained.
In a preferred embodiment, the parameter processing unit 11 may obtain a speed-time relationship of the electric submersible plunger pump from the electrical parameter, and obtain a displacement-time relationship of the electric submersible plunger pump from the speed-time relationship of the electric submersible plunger pump. For example, the displacement versus time relationship of an electric submersible plunger pump may be obtained by integrating the speed versus time relationship. And obtaining the relation between the power and the time of the electric submersible plunger pump according to the three-phase active power of the electric parameters. For example, when the electrical parameter includes three-phase active power, the power-time relationship of the electric submersible plunger pump can be obtained according to the change of the three-phase active power on the time line.
The motion speed rule of the electric submersible plunger pump can be obtained through the electric parameters of the electric submersible plunger pump, and the relation between the speed and the time in the oil well of the electric submersible plunger pump can be obtained.
In one specific example, the operation of the electric submersible plunger pump in the oil well is divided into two processes, an upstroke and a downstroke.
The speed and time relation of the electric submersible plunger pump in the upstroke can be calculated by the following formula:
the speed of the electric submersible plunger pump on the downstroke versus time can be calculated by the following formula:
wherein, t0Acceleration time or deceleration time, s; t is a period including an up stroke and a down stroke, s; w is the circle frequency; s is the stroke distance, m; n is stroke number, min-1(ii) a B is a motion coefficient, B is
In a preferred embodiment, the parameter modification unit 12 may include an electrical diagram parameter obtained by removing the data of zero displacement in the displacement-versus-time relationship and the data of zero power in the power-versus-time relationship to obtain a modification. According to the working characteristics of the electric submersible plunger pump, the electric submersible plunger pump works in an oil well and comprises an upstroke and a downstroke. A small section of the motor stops after the top dead center of the upper stroke is finished, and the motor stops for a period of time after the bottom dead center of the lower stroke is finished. In the shutdown process, the speed of the electric submersible plunger pump is zero, no effective displacement exists, and the power is also zero.
An active diagram directly formed through the calculated parameters of the electric diagram can be influenced by the shutdown state of the electric submersible plunger pump and has a zero crossing point, and in the process of curve fitting, due to the influence of the zero crossing point, data of an active diagram curve near the zero crossing point can be deviated, so that the judgment of the working condition of the electric submersible plunger pump and the fault diagnosis of accidents are influenced.
In order to better diagnose the real working condition of the electric submersible plunger pump, the calculated active diagram parameters need to be corrected. The corrected electric diagram parameters are obtained by respectively removing the data of zero displacement in the displacement-time relation and the data of zero power in the power-time relation, the active diagram is formed according to the corrected active diagram parameters, the influence of zero crossing points can be avoided, and a closed and smooth active diagram curve, namely a power-displacement curve of the active diagram conforming to the actual working condition is formed, so that the working condition of the electric submersible plunger pump can be more intuitively and accurately diagnosed, and the diagnosis accuracy is improved.
In a preferred embodiment, the electrical function diagram forming unit 13 may form a power-displacement electrical function diagram of the electrical submersible plunger pump in one stroke cycle according to the corrected electrical function diagram parameters. Specifically, an electric diagram of one stroke cycle of the electric submersible plunger pump is drawn by taking the displacement of the electric submersible plunger pump as an abscissa and the active power of a motor of the electric submersible plunger pump as an ordinate, so that points representing the displacement and the power of the electric submersible plunger pump are fitted to form a closed and smooth electric diagram curve.
In a preferred embodiment, the electrical work diagram forming unit 13 may further compare the electrical work diagram with electrical work standard diagrams of the electrical submersible plunger pump under different working conditions to obtain the working conditions of the electrical submersible plunger pump. The formed electric power diagram is compared with the corresponding electric power standard diagrams of the electric submersible plunger pump under different working conditions, and the working condition of the electric submersible plunger pump represented by the current active diagram is determined, so that whether the working state of the electric submersible plunger pump is correct or not is judged, whether the electric submersible plunger pump breaks down or not can be monitored in real time, and safety accidents are avoided. And judging that the formed active diagram is successfully compared with the active standard diagram under one working condition when the deviation of the power-displacement curve of the active diagram and the power-displacement curve of the active standard diagram under one working condition is within a preset deviation range, wherein the working condition of the electric submersible plunger pump is the same as one working condition.
In a preferred embodiment, as shown in fig. 12, the system may further include a parameter acquisition unit 10. The parameter acquiring unit 10 can acquire the electrical parameters of the electric submersible plunger pump when the oil well works. The electrical parameters such as current, voltage, active power and reactive power of the submersible plunger pump in the well can be acquired by an electrical parameter tester.
The systems, devices, modules or units illustrated in the above embodiments may be implemented by a computer chip or an entity, or by a product with certain functions. A typical implementation device is a computer device, which may be, for example, a personal computer, a laptop computer, a cellular telephone, a camera phone, a smart phone, a personal digital assistant, a media player, a navigation device, an email device, a game console, a tablet computer, a wearable device, or a combination of any of these devices.
In a typical example, the computer device specifically comprises a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the method performed by the client as described above when executing the program, or the processor implementing the method performed by the server as described above when executing the program.
Referring now to FIG. 13, shown is a schematic block diagram of a computer device 600 suitable for use in implementing embodiments of the present application.
As shown in fig. 13, the computer apparatus 600 includes a Central Processing Unit (CPU)601 which can perform various appropriate works and processes according to a program stored in a Read Only Memory (ROM)602 or a program loaded from a storage section 608 into a Random Access Memory (RAM)) 603. In the RAM603, various programs and data necessary for the operation of the system 600 are also stored. The CPU601, ROM602, and RAM603 are connected to each other via a bus 604. An input/output (I/O) interface 605 is also connected to bus 604.
The following components are connected to the I/O interface 605: an input portion 606 including a keyboard, a mouse, and the like; an output section 607 including a Cathode Ray Tube (CRT), a liquid crystal feedback (LCD), and the like, and a speaker and the like; a storage section 608 including a hard disk and the like; and a communication section 609 including a network interface card such as a LAN card, a modem, or the like. The communication section 609 performs communication processing via a network such as the internet. The driver 610 is also connected to the I/O interface 606 as needed. A removable medium 611 such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, or the like is mounted on the drive 610 as necessary, so that a computer program read out therefrom is mounted as necessary on the storage section 608.
In particular, according to an embodiment of the present invention, the processes described above with reference to the flowcharts may be implemented as computer software programs. For example, embodiments of the invention include a computer program product comprising a computer program tangibly embodied on a machine-readable medium, the computer program comprising program code for performing the method illustrated in the flow chart. In such an embodiment, the computer program may be downloaded and installed from a network through the communication section 609, and/or installed from the removable medium 611.
Computer-readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, a computer readable medium does not include a transitory computer readable medium such as a modulated data signal and a carrier wave.
For convenience of description, the above devices are described as being divided into various units by function, and are described separately. Of course, the functionality of the units may be implemented in one or more software and/or hardware when implementing the present application.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The application may be described in the general context of computer-executable instructions, such as program modules, being executed by a computer. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform particular tasks or implement particular abstract data types. The application may also be practiced in distributed computing environments where tasks are performed by remote processing devices that are linked through a communications network. In a distributed computing environment, program modules may be located in both local and remote computer storage media including memory storage devices.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.
The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (10)
1. The method for diagnosing the working condition of the oil well with the electric submersible plunger pump is characterized by comprising the following steps of:
obtaining an electrical diagram parameter according to the electrical parameter of the electric submersible plunger pump when the oil well works;
removing zero crossing points in the electric diagram parameters to obtain corrected electric diagram parameters;
forming an electric power diagram according to the corrected electric power diagram parameters so as to diagnose the working condition of the electric submersible plunger pump;
the electrical parameters of the electric submersible plunger pump comprise three-phase current, three-phase voltage, three-phase active power and three-phase reactive power of the electric submersible plunger pump;
the step of obtaining the parameters of the electric diagram according to the electric parameters of the electric submersible plunger pump during the working of the oil well specifically comprises the following steps:
obtaining the speed and time relation of the electric submersible plunger pump according to the electrical parameters;
obtaining the relation between the displacement and the time of the electric submersible plunger pump according to the relation between the speed and the time of the electric submersible plunger pump;
obtaining the relation between the power and the time of the electric submersible plunger pump according to the three-phase active power of the electric parameter;
the step of removing zero crossing points in the electric function diagram parameters to obtain corrected electric function diagram parameters specifically includes:
and respectively removing the data with zero displacement in the displacement and time relation and the data with zero power in the power and time relation to obtain the corrected electric diagram parameters.
2. The method for diagnosing the working condition of the oil well with the electric submersible plunger pump according to the claim 1, wherein the step of forming the electric diagram according to the corrected parameters of the electric diagram specifically comprises the following steps:
and forming a power-displacement electric power diagram of the electric submersible plunger pump in a stroke cycle according to the corrected electric power diagram parameters.
3. The method of claim 1, further comprising the step of obtaining electrical parameters of the electric submersible plunger pump while the well is in operation.
4. The method for diagnosing the working condition of the oil well with the electric submersible plunger pump according to claim 1, wherein the step of specifically diagnosing the working condition of the electric submersible plunger pump comprises the following steps:
and comparing the electric work diagram with the electric work standard diagram of the electric submersible plunger pump under different working conditions to obtain the working condition of the electric submersible plunger pump.
5. An electric submersible plunger pump oil well working condition diagnosis system is characterized by comprising:
the parameter processing unit is used for obtaining an electric diagram parameter according to the electric parameter of the electric submersible plunger pump when the oil well works;
the parameter correcting unit is used for removing zero crossing points in the electric diagram parameters to obtain corrected electric diagram parameters;
the electric work graph forming unit is used for forming an electric work graph according to the corrected electric work graph parameters so as to diagnose the working condition of the electric submersible plunger pump;
the electrical parameters of the electric submersible plunger pump comprise three-phase current, three-phase voltage, three-phase active power and three-phase reactive power of the electric submersible plunger pump;
the parameter processing unit is specifically used for obtaining the speed and time relation of the electric submersible plunger pump according to the electric parameters, obtaining the displacement and time relation of the electric submersible plunger pump according to the speed and time relation of the electric submersible plunger pump, and obtaining the power and time relation of the electric submersible plunger pump according to the three-phase active power of the electric parameters;
the parameter correction unit is specifically configured to remove data with zero displacement in the relationship between displacement and time and data with zero power in the relationship between power and time to obtain corrected electrical function diagram parameters.
6. The electrical submersible plunger pump oil well condition diagnosis system according to claim 5, characterized in that the electrical diagram forming unit is specifically configured to form a power-displacement electrical diagram of the electrical submersible plunger pump in one stroke cycle according to the corrected electrical diagram parameters.
7. The electrical submersible plunger pump oil well condition diagnostic system according to claim 5, further comprising a parameter acquisition unit;
the parameter acquisition unit is used for acquiring the electric parameters of the electric submersible plunger pump during the working of the oil well.
8. The electrical submersible plunger pump oil well condition diagnostic system of claim 5, wherein the system further comprises an analytical diagnostic unit;
and the analysis and diagnosis unit is used for comparing the electric power diagram with the electric power standard diagram of the electric submersible plunger pump under different working conditions to obtain the working condition of the electric submersible plunger pump.
9. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the method according to any of claims 1-4 when executing the program.
10. A computer-readable medium, on which a computer program is stored which, when being executed by a processor, carries out the method according to any one of claims 1 to 4.
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| CN201910155044.4A CN111637044B (en) | 2019-03-01 | 2019-03-01 | Electric submersible plunger pump oil well working condition diagnosis method and system |
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| CN201910155044.4A CN111637044B (en) | 2019-03-01 | 2019-03-01 | Electric submersible plunger pump oil well working condition diagnosis method and system |
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| US7321211B2 (en) * | 2006-04-28 | 2008-01-22 | Unico, Inc. | Power variation control system for cyclic loads |
| CN102184414B (en) * | 2011-05-16 | 2013-03-13 | 中国石油天然气股份有限公司 | Method and system for identifying and judging pump indicator diagram |
| CN105804984B (en) * | 2014-12-31 | 2018-05-08 | 中国石油天然气股份有限公司 | Fault diagnosis method and system for electric submersible plunger pump |
| CN105672988B (en) * | 2015-12-30 | 2019-09-06 | 中国石油天然气股份有限公司 | Oil pumping unit indicator diagram diagnosis system and method |
| CN108979623A (en) * | 2018-06-20 | 2018-12-11 | 陕西安控科技有限公司 | A kind of recognition methods of exception indicator card |
| CN109184669A (en) * | 2018-08-03 | 2019-01-11 | 常州大学 | A kind of concentration visual presentation method of oil well production dynamic monitoring data |
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