CN114198292B - Fracturing pump set control system and control method - Google Patents
Fracturing pump set control system and control method Download PDFInfo
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- CN114198292B CN114198292B CN202111241034.6A CN202111241034A CN114198292B CN 114198292 B CN114198292 B CN 114198292B CN 202111241034 A CN202111241034 A CN 202111241034A CN 114198292 B CN114198292 B CN 114198292B
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000003245 coal Substances 0.000 claims abstract description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 89
- 239000007788 liquid Substances 0.000 claims description 81
- 239000003921 oil Substances 0.000 claims description 32
- 238000002347 injection Methods 0.000 claims description 31
- 239000007924 injection Substances 0.000 claims description 31
- 239000012530 fluid Substances 0.000 claims description 23
- 238000012544 monitoring process Methods 0.000 claims description 20
- 239000010687 lubricating oil Substances 0.000 claims description 15
- 239000007858 starting material Substances 0.000 claims description 15
- 230000001105 regulatory effect Effects 0.000 claims description 10
- 238000007789 sealing Methods 0.000 claims description 6
- 238000005461 lubrication Methods 0.000 claims description 4
- 230000001276 controlling effect Effects 0.000 claims description 3
- 238000010992 reflux Methods 0.000 claims description 2
- 230000008901 benefit Effects 0.000 abstract description 4
- 230000005611 electricity Effects 0.000 abstract description 2
- 238000002955 isolation Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 230000008054 signal transmission Effects 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 230000001502 supplementing effect Effects 0.000 description 2
- 230000003313 weakening effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Classifications
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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
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
- F04B49/065—Control using electricity and making use of computers
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
- E21B43/2607—Surface equipment specially adapted for fracturing operations
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/16—Methods of underground mining; Layouts therefor
- E21C41/18—Methods of underground mining; Layouts therefor for brown or hard coal
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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
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/02—Stopping, starting, unloading or idling control
- F04B49/022—Stopping, starting, unloading or idling control by means of pressure
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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
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/20—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by changing the driving speed
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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
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/18—Lubricating
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Remote Sensing (AREA)
- Computer Hardware Design (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The application provides a fracturing pump set control system and control method, wherein, fracturing pump set control system that this application provided in the first aspect includes: the central control unit is used for receiving a target pressure value of the fracturing pump; the fracturing pump sensor group is used for detecting the actual pressure value of the fracturing pump; the fracturing pump controller is respectively and electrically connected with the central control unit and the fracturing pump sensor group and is used for comparing the target pressure value with the actual pressure value and judging whether the actual pressure value suddenly drops or not; the frequency converter is electrically connected with the fracturing pump controller; the fracturing pump motor, fracturing pump motor is connected with the converter electricity, and this application compares the advantage that has with prior art and is: the rotating speed of the fracturing pump motor can be adjusted rapidly and continuously, the degree of automation is high, the fracturing efficiency of the coal seam is effectively improved, and the safety of the fracturing operation of the coal seam is higher.
Description
Technical Field
The application relates to the technical field of fracturing pump sets, in particular to a fracturing pump set control system and a fracturing pump set control method.
Background
The underground coal mine fracturing technology is mainly applied to weakening of a hard roof and pressure relief of high-stress roadway surrounding rocks, and is implemented by injecting high-pressure water or other fracturing media into a coal seam liquid injection hole by utilizing a fracturing pump set to enable a coal seam to generate cracks and develop and grow up, so that rock burst prevention and control, dynamic pressure roadway pressure relief, roof weakening of an island working face, improvement of caving and releasing of the hard roof, regional fracturing modification of the roof due to working face stagnation and the like are effectively promoted.
The rotational speed of fracturing pump motor can't be adjusted in the opening of present fracturing pump package, can only rely on mechanical type hydraulic transmission to realize that fracturing pump motor is variable according to setting for the gear, and efficiency is lower and the precision is relatively poor, moreover, the fracturing pump package is annotating the liquid after, annotates the downthehole pressure of liquid and continuously rises, and the rising amplitude is big, causes the downthehole pressure of coal seam to annotate after the completion of fracturing in the liquid easily and is too high, leads to the security of fracturing operation lower.
Disclosure of Invention
The present application aims to solve, at least to some extent, one of the technical problems in the related art.
Therefore, the application aims at providing a control system and a control method of a fracturing pump set.
To achieve the above object, a fracturing pump set control system according to a first aspect of the present application includes: a central control unit for receiving a target pressure value for the fracturing pump; the fracturing pump sensor group is used for detecting the actual pressure value of the fracturing pump; the fracturing pump controller is electrically connected with the central control unit and the fracturing pump sensor group respectively and is used for comparing the target pressure value with the actual pressure value and judging whether the actual pressure value suddenly drops or not; the frequency converter is electrically connected with the fracturing pump controller; and the fracturing pump motor is electrically connected with the frequency converter.
The fracturing pump set control system further comprises: the central control unit is electrically connected with the fracturing pump controller through the water tank controller; the water tank sensor group is electrically connected with the water tank controller; the electromagnetic pilot valve is electrically connected with the water tank controller; the electric regulating valve is electrically connected with the water tank controller; the first vacuum electromagnetic starter is electrically connected with the water tank controller; and the booster pump motor is electrically connected with the first vacuum electromagnetic starter.
The water tank sensor group includes: the water tank liquid level sensor is electrically connected with the water tank controller; the reflux flow sensor is electrically connected with the water tank controller; and the liquid outlet flow sensor is electrically connected with the water tank controller.
The central control unit includes: the central controller is electrically connected with the water tank controller; and the monitoring host is electrically connected with the central controller.
The central controller is electrically connected with the water tank controller through the isolation coupler, and the monitoring host is electrically connected with the central controller through the signal converter.
The fracturing pump set control system further comprises: the second vacuum electromagnetic starter is electrically connected with the fracturing pump controller; and the lubricating oil pump motor is electrically connected with the second vacuum electromagnetic starter.
The fracturing pump sensor group includes: the hydraulic inlet force sensor is electrically connected with the fracturing pump controller; the hydraulic outlet sensor is electrically connected with the fracturing pump controller; a lubrication oil pressure sensor electrically connected with the fracturing pump controller; the fracturing pump liquid level sensor is electrically connected with the fracturing pump controller; and the temperature sensor is electrically connected with the fracturing pump controller.
The fracturing pump motor is provided with a reference frequency point, the output frequency of the frequency converter is greater than or equal to the reference frequency point, the fracturing pump motor is a constant power motor, and the output frequency of the frequency converter is smaller than the reference frequency point, and the fracturing pump motor is a constant torque motor.
The fracturing pump set control method provided in the second aspect of the application comprises the following steps: s1: inputting a target pressure value of the fracturing pump to a central control unit; s2: the fracturing pump controller obtains the target pressure value through the central control unit, and obtains the actual pressure value of the fracturing pump through a fracturing pump sensor group; s3: the fracturing pump controller controls the output frequency of the frequency converter to enable the actual pressure value to be smaller than the target pressure value; s4: the fracturing pump controller increases the output frequency of the frequency converter along a gear so as to continuously increase the actual pressure value until the actual pressure value is greater than or equal to the target pressure value, and the fracturing pump controller judges whether the actual pressure value suddenly drops; if the actual pressure value suddenly drops, the fracturing pump controller controls the frequency converter to close the fracturing pump motor; if the actual pressure value does not drop suddenly, the target pressure value is increased, and the steps S3 to S4 are repeated.
The fracturing pump controller controlling the output frequency of the frequency converter such that the actual pressure value is less than the target pressure value comprises: the fracturing pump controller compares the target pressure value with the actual pressure value, and if the actual pressure value is greater than or equal to the target pressure value, the output frequency of the frequency converter is reduced until the actual pressure value is less than the target pressure value.
After adopting above-mentioned technical scheme, this application compares the advantage that has with prior art and is:
through the cooperation of parts such as fracturing pump controller, converter, make fracturing pump motor can be quick and continuous adjustment rotational speed, degree of automation is high, effectively improves coal seam fracturing efficiency, and makes the security of coal seam fracturing operation higher.
And the pressure in the coal seam liquid injection hole is increased stepwise by continuously adjusting the target pressure value, so that the safe fracturing in the coal seam liquid injection hole is realized.
Additional aspects and advantages of the application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the application.
Drawings
The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:
FIG. 1 is a schematic diagram of a control system for a fracturing pump set according to an embodiment of the present disclosure;
FIG. 2 is a schematic diagram of a fracturing pump unit in a fracturing pump unit control system according to an embodiment of the present disclosure;
FIG. 3 is a schematic diagram of a fracturing pump set in a fracturing pump set control system according to an embodiment of the present disclosure;
as shown in the figure: 1. the hydraulic fracturing device comprises a frame, 2, a fracturing pump, 3, a fracturing pump motor, 4, a frequency converter, 5, a fracturing pump controller, 6, an oil pump, 7, a lubricating oil pump motor, 8, a second vacuum electromagnetic actuator, 9, a hydraulic inlet sensor, 10, a hydraulic outlet sensor, 11, a lubricating oil pressure sensor, 12, a fracturing pump liquid level sensor, 13, a temperature sensor, 14, a water tank, 15, a water tank controller, 16, an electromagnetic pilot valve, 17, an electric regulating valve, 18, a first vacuum electromagnetic actuator, 19, a booster pump motor, 20, a water tank liquid level sensor, 21, a return flow sensor, 22, a liquid outlet flow sensor, 23, a central controller, 24, a monitoring host, 25, an isolating coupler, 26, a signal converter, 27 and a stabilized voltage power supply.
Detailed Description
Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application. On the contrary, the embodiments of the present application include all alternatives, modifications, and equivalents as may be included within the spirit and scope of the appended claims.
As shown in fig. 1, the embodiment of the application provides a fracturing pump 2 set control system, which comprises a central control unit, a fracturing pump 2 sensor group, a fracturing pump controller 5, a frequency converter 4 and a fracturing pump motor 3.
In some embodiments, as shown in fig. 2, the fracturing pump 2 set includes a frame 1, fracturing pumps 2, a water tank 14, an oil pump 6, and an oil tank.
The carriage 1 is fixedly provided with a carriage, and the bottom of the carriage is provided with wheels.
The fracturing pump 2 is fixedly arranged in the carriage of the carriage 1, the water tank 14 is fixedly arranged in the carriage of the carriage 1, fracturing fluid is filled in the fracturing pump, the liquid inlet of the fracturing pump 2 is communicated with the liquid outlet of the water tank 14, the liquid outlet of the fracturing pump is communicated with the liquid injection pipe, and the liquid injection pipe is communicated with the coal seam liquid injection hole, so that after the fracturing pump 2 runs, the fracturing pump can convey the fracturing fluid in the water tank 14 into the liquid injection hole.
In some embodiments, the fracturing fluid may employ water or other fracturing medium.
As shown in fig. 3, the oil tank is fixedly arranged outside the carriage of the frame 1, lubricating oil is filled in the oil tank, the oil pump 6 is fixedly arranged outside the carriage of the frame 1, the oil inlet of the oil tank is communicated with the oil outlet of the oil tank, and the oil outlet of the oil tank is communicated with the oil cavity of the fracturing pump 2, so that after the oil pump 6 operates, the lubricating oil in the oil tank can be conveyed into the oil cavity of the fracturing pump 2.
In some embodiments, the fracturing pump 2 set control system further comprises a second vacuum electromagnetic starter 8 and a lube pump motor 7.
The second vacuum electromagnetic starter 8 is electrically connected with the fracturing pump controller 5, the lubricating oil pump motor 7 is electrically connected with the second vacuum electromagnetic starter 8, the lubricating oil pump motor 7 is fixedly arranged outside a carriage of the frame 1, the output end of the lubricating oil pump motor 7 is connected with the power input end of the oil pump 6, the conveying of the fracturing pump 2 to lubricating oil is realized through the driving of the lubricating oil pump motor 7, and the starting and stopping of the oil pump 6 are controlled by the fracturing pump controller 5 through the setting of the second vacuum electromagnetic starter 8.
In some embodiments, the model of the second vacuum electromagnetic actuator 8 employs QJZ-200/1140 (660) -4.
In some embodiments, lubricant pump motor 7 is model YBK3-112M-4 (660/1140).
The central control unit is used for receiving the target pressure value of the fracturing pump 2, and enables the control system to perform man-machine interaction and enable the fracturing pump 2 to automatically operate.
The fracturing pump 2 sensor group is used for detecting an actual pressure value of the fracturing pump 2, and the fracturing pump controller 5 can acquire real-time fracturing pump 2 pressure through the fracturing pump 2 sensor group, so that the fracturing pump controller 5 can automatically control the fracturing pump 2 conveniently.
In some embodiments, the fracturing pump 2 sensor set includes an inlet pressure sensor 9, an outlet pressure sensor 10, a lubrication oil pressure sensor 11, a fracturing pump level sensor 12, and a temperature sensor 13.
The hydraulic pressure inlet sensor 9 is electrically connected with the fracturing pump controller 5, and the hydraulic pressure inlet sensor 9 is fixedly arranged at the hydraulic inlet of the fracturing pump 2, converts the hydraulic pressure of the fracturing pump 2 into an electric signal and sends the electric signal to the fracturing pump controller 5, so that the central control unit can monitor the hydraulic pressure of the fracturing pump 2 conveniently.
In some embodiments, an inlet fluid pressure threshold is set in the fracturing pump controller 5, the fracturing pump controller 5 compares the actual inlet fluid pressure with the threshold, and if the actual inlet fluid pressure is greater than the threshold, the fracturing pump controller 5 controls the fracturing pump 2 to stop so as to ensure the whole group of the fracturing pumps 2 to run safely.
In some embodiments, the hydraulic pressure sensor 9 is of the type GPD2.5, and the maximum detection range is 0-1.6Mpa.
The hydraulic pressure outlet sensor 10 is electrically connected with the fracturing pump controller 5, the hydraulic pressure outlet sensor 10 is fixedly arranged at the liquid outlet of the fracturing pump 2, the hydraulic pressure outlet sensor converts the liquid outlet pressure of the fracturing pump 2 into an electric signal and sends the electric signal to the fracturing pump controller 5 so that the central control unit can monitor the liquid outlet pressure of the fracturing pump 2, the liquid outlet pressure of the fracturing pump 2 is the actual pressure in the coal seam liquid injection hole, and the fracturing pump controller 5 can acquire the actual pressure value through the hydraulic pressure outlet sensor 10, so that the fracturing pump 2 can be automatically controlled.
In some embodiments, the hydraulic pressure sensor 10 is of the type GPD2.5 with a maximum detection range of 0-60Mpa.
The lubricating oil pressure sensor 11 is electrically connected with the fracturing pump controller 5, and the lubricating oil pressure sensor 11 is fixedly arranged in an oil cavity of the fracturing pump 2, converts lubricating oil pressure of the fracturing pump 2 into an electric signal and sends the electric signal to the fracturing pump controller 5, so that the central control unit can monitor the oil pressure of the fracturing pump 2 conveniently.
In some embodiments, a lubricant pressure threshold is set in the fracturing pump controller 5, the fracturing pump controller 5 compares the actual oil pressure with the threshold, and if the actual oil pressure is greater than the threshold, the fracturing pump controller 5 controls the fracturing pump 2 to stop so as to ensure the safe operation of the whole fracturing pump 2 group.
In some embodiments, the lubrication oil pressure sensor 11 is of the type GPD2.5, and has a maximum detection range of 0-2.5MPa.
The fracturing pump liquid level sensor 12 is electrically connected with the fracturing pump controller 5, and the fracturing pump liquid level sensor 12 is fixedly arranged in an oil cavity of the fracturing pump 2, converts the oil level of the fracturing pump 2 into an electric signal and sends the electric signal to the fracturing pump controller 5, so that the central control unit can monitor the oil level of the fracturing pump 2 conveniently.
In some embodiments, a threshold value of the oil level of the lubricating oil is set in the fracturing pump controller 5, the fracturing pump controller 5 compares the actual oil level with the threshold value, and if the actual oil level is smaller than the threshold value, the fracturing pump controller 5 controls the fracturing pump 2 to stop so as to ensure the safe operation of the whole group of the fracturing pumps 2.
In some embodiments, the frac pump level sensor 12 employs a float level switch, model KHU.
The temperature sensor 13 is electrically connected with the fracturing pump controller 5, and the temperature sensor 13 is fixedly arranged on the fracturing pump 2, converts the temperature of the fracturing pump 2 into an electric signal and sends the electric signal to the fracturing pump controller 5, so that the central control unit can monitor the temperature of the fracturing pump 2 conveniently.
In some embodiments, a fracturing pump 2 temperature threshold is set in the fracturing pump controller 5, the fracturing pump controller 5 compares the actual temperature with the threshold, and if the actual temperature is greater than the threshold, the fracturing pump controller 5 controls the fracturing pump 2 to stop so as to ensure the safe operation of the whole fracturing pump 2 group.
In some embodiments, the model of fracturing pump 2 employs GWP100.
The fracturing pump controller 5 is electrically connected with the central control unit and the fracturing pump 2 sensor group respectively and is used for comparing a target pressure value with an actual pressure value and judging whether the actual pressure value suddenly drops, namely, the fracturing pump controller 5 can acquire the target pressure value set by an operator through the central control unit and simultaneously can acquire the actual pressure value in the coal seam liquid injection hole through the fracturing pump 2 sensor group, so that the fracturing pump controller 5 compares the target pressure value with the actual pressure value and controls the output frequency of the frequency converter 4 to judge whether the actual pressure value suddenly drops so as to realize automatic coal seam fracturing, improve the coal seam fracturing efficiency and ensure that the safety of coal seam fracturing operation is higher.
In some embodiments, the frac pump controller 5 is fixedly disposed within the cabin of the frame 1.
In some embodiments, the model of the frac pump controller 5 employs a KXH12.
The frequency converter 4 is electrically connected with the fracturing pump controller 5, the fracturing pump controller 5 sends control electric signals to the frequency converter 4, the frequency converter 4 outputs corresponding electric signals according to the control electric signals, and through the arrangement of the frequency converter 4, not only can power be provided for the fracturing pump motor 3, but also the rotating speed of the fracturing pump motor 3can be quickly and continuously adjusted, so that the fracturing pump 2 is higher in flexibility and better in universality;
in some embodiments, the frequency converter 4 is fixedly disposed within the cabin of the frame 1.
In some embodiments, the frequency converter 4 is an AC frequency converter 4, and the model is BPJ-500/1140.
The fracturing pump motor 3 is connected with the converter 4 electricity, the output of fracturing pump motor 3 is connected with the power input of fracturing pump 2, through the drive of fracturing pump motor 3, realize the transportation of fracturing pump 2 to fracturing fluid, and through the output frequency of control converter 4, the rotational speed of fracturing pump motor 3can be adjusted, the higher the output frequency of converter 4 promptly, then the rotational speed of fracturing pump motor 3 is bigger, conversely, the lower the output frequency of converter 4, then the rotational speed of fracturing pump motor 3 is littleer, simultaneously, the converter 4 sends the rotational speed signal of fracturing pump motor 3 to fracturing pump controller 5 in order that central control unit to the control of fracturing pump motor 3 rotational speed.
In some embodiments, the frac pump motor 3 is fixedly disposed within the cabin of the frame 1.
In some embodiments, the fracturing pump motor 3 is provided with a reference frequency point, the output frequency of the frequency converter 4 is greater than or equal to the reference frequency point, the fracturing pump motor 3 is a constant-power motor, namely, when the frequency of the fracturing pump motor 3 is the reference frequency point or is between the reference frequency point and the maximum power point, the power of the fracturing pump motor 3 is constant, the rotating speed and the torque of the fracturing pump motor are in inverse proportion, the rotating speed of the fracturing pump motor 3 is greater, the torque is smaller, and conversely, the rotating speed is smaller, the torque is greater, the mode has the characteristics of small displacement and high pressure, and is suitable for liquid injection after the hole sealing of a coal seam liquid injection hole and before the fracturing is completed, and high-efficiency fracturing of the coal seam is ensured;
the output frequency of the frequency converter 4 is smaller than a reference frequency point, the fracturing pump motor 3 is a constant torque motor, namely when the frequency of the fracturing pump motor 3 is lower than the reference frequency point, the torque of the fracturing pump motor 3 is constant, and the mode has the characteristic of large discharge capacity and low pressure, is suitable for liquid injection during hole sealing of a coal seam liquid injection hole and after fracturing is completed, and ensures hole sealing of the coal seam liquid injection hole and safe pressure relief of a coal seam.
Therefore, through switching of the two modes of the fracturing pump motor 3, high-efficiency fracturing of the coal seam can be guaranteed, and sealing of a coal seam liquid injection hole and safe pressure relief after completion of the fracturing of the coal seam can be guaranteed.
In some embodiments, the frac pump motor 3 employs 4 pairs of poles, with a reference frequency point of 30Hz and a highest frequency of 100Hz.
In some embodiments, the fracturing pump motor 3 is an explosion-proof asynchronous motor, and the model of the fracturing pump motor is YBP-4004-4 (660/1140).
In some embodiments, the fracturing pump 2 set control system further includes a tank controller 15, a tank 14 sensor set, an electromagnetic pilot valve 16, an electrically-operated regulator valve 17, a first vacuum electromagnetic actuator 18, and a booster pump motor 19.
The central control unit is electrically connected with the fracturing pump controller 5 through the water tank controller 15, namely the central control unit is electrically connected with the water tank controller 15, and the water tank controller 15 is electrically connected with the fracturing pump controller 5, so that the fracturing pump controller 5 can perform signal transmission between the water tank controller 15 and the central control unit, and the water tank controller 15 and the central control unit can perform signal transmission, so that the fracturing pump 2 and the water tank 14 can be monitored through the central control unit.
In some embodiments, the model of the tank controller 15 employs a KXH12.
In some embodiments, the central control unit includes a central controller 23 and a monitoring host 24.
The central controller 23 is electrically connected with the water tank controller 15, and the central controller 23 is used for carrying out electric signal transmission with the water tank controller 15 so as to realize the monitoring of the fracturing pump 2 and the water tank 14 by the central control unit.
In some embodiments, the central controller 23 is electrically connected with the water tank controller 15 through the isolating coupler 25, that is, one end of the isolating coupler 25 is electrically connected with the central controller 23, the other end of the isolating coupler 25 is electrically connected with the water tank controller 15, and the isolating coupler 25 can convert the electrical signals of the central controller 23 and the water tank controller 15 into optical signals for mutual transmission, so that electrical isolation is formed between the central controller 23 and the water tank controller 15, and safety and stability between the central controller 23 and the water tank controller 15 are improved.
In some embodiments, the model of the isolation coupler 25 employs SAC-I.
In some embodiments, a regulated power supply 27 is provided at the power supply end of the isolation coupler 25, and the isolation coupler 25 is powered by the regulated power supply 27.
In some embodiments, regulated power supply 27 is of the type KDW127/12/2.0.
The monitoring host 24 is electrically connected with the central controller 23, an operator inputs control information to the monitoring host 24, the monitoring host 24 processes the control information and converts the control information into an electric signal to be sent to the central controller 23, and conversely, the central controller 23 sends monitoring information of the fracturing pump 2 and the water tank 14 to the monitoring host 24 in the form of an electric signal, and the monitoring host 24 processes the electric signal and displays the electric signal.
In some embodiments, the monitoring host 24 has peripherals such as a keyboard, mouse, display, etc.
In some embodiments, the model of the monitoring host 24 employs ZDYZ-127 (A).
In some embodiments, the monitoring host 24 is electrically connected to the central controller 23 through the signal converter 26, that is, one end of the signal converter 26 is electrically connected to the monitoring host 24, and the other end of the signal converter 26 is electrically connected to the central controller 23, where the signal converter 26 CAN implement signal conversion between the central controller 23CAN and the RS422 of the monitoring host 24, so as to ensure signal transmission between the monitoring host 24 and the central controller 23.
In some embodiments, the model of signal converter 26 employs KZC12 (B).
The water tank 14 sensor group is electrically connected with the water tank controller 15, and the water tank controller 15 can acquire real-time water tank 14 information through the water tank 14 sensor group, so that the water tank controller 15 can conveniently control the water tank 14.
In some embodiments, the set of tank 14 sensors includes a tank level sensor 20, a return flow sensor 21, and a discharge flow sensor 22.
The water tank liquid level sensor 20 is electrically connected with the water tank controller 15, and the water tank liquid level sensor 20 is fixedly arranged in the water tank 14, converts a liquid level signal in the water tank 14 into an electric signal and sends the electric signal to the water tank controller 15, so that the central control unit can monitor the liquid level of the water tank 14 conveniently.
In some embodiments, the tank level sensor 20 is a pressure sensor, model GPD20K, that converts pressure into the weight of the fracturing fluid, causing the tank controller 15 to obtain the level of the fluid in the tank 14.
The return flow sensor 21 is electrically connected with the water tank controller 15, and the return flow sensor 21 is fixedly arranged at a return port of the water tank 14, converts return flow of the water tank 14 into an electric signal and sends the electric signal to the water tank controller 15, so that the central control unit can monitor the return flow of the water tank 14 conveniently.
The liquid outlet flow sensor 22 is electrically connected with the water tank controller 15, and the liquid outlet flow sensor 22 is fixedly arranged at the liquid outlet of the water tank 14, converts the liquid outlet flow of the water tank 14 into an electric signal and sends the electric signal to the water tank controller 15, so that the central control unit can monitor the liquid outlet flow of the water tank 14 conveniently.
In some embodiments, LZD127/50G is used for both the return flow sensor 21 and the outlet flow sensor 22.
The electromagnetic pilot valve 16 is electrically connected with the water tank controller 15, the electromagnetic pilot valve 16 is fixedly arranged in a carriage of the carriage 1, one end of the electromagnetic pilot valve 16 is communicated with a fluid supplementing port of the water tank 14, the other end of the electromagnetic pilot valve is communicated with a fracturing fluid storage position, and the water tank controller 15 controls the opening of the electromagnetic pilot valve 16 so as to realize fluid supplementing of the water tank 14 and ensure that the water tank 14 always maintains enough fluid quantity.
In some embodiments, the electromagnetic pilot valve 16 is sized using FHD1.2/40X.
In some embodiments, a liquid level threshold is provided in the tank controller 15, the tank controller 15 compares the actual liquid level with the threshold, and if the actual liquid level is less than the threshold, the tank controller 15 controls the electromagnetic pilot valve 16 to be opened for liquid replenishment.
The electric control valve 17 is fixedly arranged in the carriage of the carriage 1, the liquid outlet of the fracturing pump 2 is of a Y-shaped structure, one end of the electric control valve is communicated with one end of the electric control valve 17, the other end of the electric control valve 17 is communicated with the liquid injection pipe, and the other end of the electric control valve 17 is communicated with the liquid return port of the water tank 14, so that after the electric control valve 17 is opened, the fracturing liquid at the liquid outlet of the fracturing pump 2 partially enters the coal seam liquid injection hole, and the other part of the fracturing liquid enters the water tank 14, so that the impact of the fracturing liquid to the coal seam liquid injection hole when the fracturing pump 2 is opened is effectively buffered, the hole sealing operation of the liquid injection hole is ensured, and after the fracturing pump 2 is opened, the electric control valve 17 can be gradually closed.
The electric regulating valve 17 is electrically connected with the water tank controller 15, and the water tank controller 15 controls the electromagnetic pilot valve 16 so as to control the liquid amount conveyed by the fracturing pump 2 into the coal seam liquid injection hole.
In some embodiments, the electrically operated regulator valve 17 is model ZJK30-24 (660/380).
In some embodiments, a booster pump is fixedly arranged in a carriage of the frame 1, a liquid inlet of the booster pump is communicated with a liquid outlet of the water tank 14, a liquid outlet of the booster pump is communicated with a liquid inlet of the fracturing pump 2, and the conveying of fracturing liquid in the water tank 14 into the fracturing pump 2 is ensured through the booster pump.
In some embodiments, the booster pump is model YBK3-132S-4 (660/1140).
The first vacuum electromagnetic starter 18 is electrically connected with the water tank controller 15, the booster pump motor 19 is electrically connected with the first vacuum electromagnetic starter 18, the output end of the booster pump motor 19 is connected with the power input end of the booster pump, the conveying of the booster pump to fracturing fluid is achieved through the driving of the booster pump motor 19, and the water tank controller 15 is convenient to control the starting and stopping of the booster pump through the arrangement of the first vacuum electromagnetic starter 18.
In some embodiments, the model of the second vacuum electromagnetic actuator 8 employs QJZ-200/1140 (660) -4.
In some embodiments, the first vacuum electromagnetic actuator 18 and the second vacuum electromagnetic actuator 8 may be the same vacuum electromagnetic actuator.
In some embodiments, the power to the fracturing pump group 2 control system is supplied by a transformer at the job site.
The embodiment of the application also provides a fracturing pump 2 group control method, which comprises the following steps:
s1: and the target pressure value of the fracturing pump 2 is input to the central control unit, and the setting of the target pressure value can prevent the excessive hydraulic pressure in the coal seam fluid injection hole after the fracturing pump 2 is started, so that the safe fracturing in the coal seam fluid injection hole is ensured.
In some embodiments, the operator inputs a target pressure value into the central control unit's monitoring host 24 based on past coal seam injection hole fracturing data.
S2: the fracturing pump controller 5 obtains a target pressure value through the central control unit, and obtains an actual pressure value of the fracturing pump 2 through a fracturing pump 2 sensor group.
In some embodiments, the fracturing pump controller 5 obtains a target pressure value through the central controller 23 and an actual pressure value of the fracturing pump 2 through the outlet pressure sensor 10.
S3: the fracturing pump controller 5 controls the output frequency of the frequency converter 4 to enable the actual pressure value to be smaller than the target pressure value, so that the actual pressure value can be continuously increased below the target pressure value, and fracturing in the coal seam fluid injection hole can be safely completed.
In some embodiments, the fracturing pump controller 5 controlling the output frequency of the frequency converter 4 such that the actual pressure value is less than the target pressure value comprises: the fracturing pump controller 5 compares the target pressure value with the actual pressure value, and if the actual pressure value is greater than or equal to the target pressure value, reduces the output frequency of the frequency converter 4 until the actual pressure value is less than the target pressure value.
S4: the fracturing pump controller 5 increases the output frequency of the frequency converter 4 along the gear so as to continuously increase the actual pressure value until the actual pressure value is greater than or equal to the target pressure value, and the fracturing pump controller 5 judges whether the actual pressure value suddenly drops, wherein if the actual pressure value suddenly drops, the fracturing pump controller 5 controls the frequency converter 4 to close the fracturing pump motor 3; if the actual pressure value does not suddenly drop, the target pressure value is increased, and S3 to S4 are repeated, so that the pressure in the coal seam liquid injection hole is gradually increased under the continuous adjustment of the target pressure value, and the safe fracturing in the coal seam liquid injection hole is realized.
In some embodiments, the output frequency of the frequency converter 4 has 8 gears, namely 30Hz, 40Hz, 50Hz, 60Hz, 70Hz, 80Hz, 90Hz and 100Hz, when in the constant power mode, and the corresponding rotation speeds of the fracturing pump motor 3 are 447r/min, 596r/min, 745r/min, 894r/min, 1043r/min, 1192r/min, 1341r/min and 1490r/min respectively.
When the output frequency of the frequency converter 4 is 100Hz, the torque of the fracturing pump motor 3can reach 6409N meter, the rotation speed of the motor is reduced along with the reduction of the frequency, the torque is increased along with the reduction of the frequency, and the torque can reach 18821N meter at 30 Hz.
The fracturing pump controller 5 increases the output frequency of the frequency converter 4 along the 8 gears so as to ensure safe fracturing in the coal seam fluid injection hole.
In some embodiments, the method of the fracturing pump controller 5 determining whether the actual pressure value suddenly drops comprises:
s41: determining a continuous time point;
s42: recording the actual pressure value of the fracturing pump 2 according to the continuous time points;
s43: comparing the actual pressure value of the later time point with the actual pressure value of the former time point, and judging that the actual pressure value suddenly drops if the actual pressure value of the later time point is far smaller than the actual pressure value of the former time point.
In some embodiments, the magnitude of the increase in the target pressure value may be set by the fracturing pump controller 5 according to actual needs.
It should be noted that in the description of the present application, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Furthermore, in the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and further implementations are included within the scope of the preferred embodiment of the present application in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present application.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present application have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the application, and that variations, modifications, alternatives, and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the application.
Claims (9)
1. A frac pump set control system, comprising:
a central control unit for receiving a target pressure value for the fracturing pump;
the fracturing pump sensor group is used for detecting the actual pressure value of the fracturing pump;
the fracturing pump controller is electrically connected with the central control unit and the fracturing pump sensor group respectively and is used for comparing the target pressure value with the actual pressure value and judging whether the actual pressure value suddenly drops or not;
the frequency converter is electrically connected with the fracturing pump controller;
the fracturing pump motor is electrically connected with the frequency converter;
the fracturing pump sensor group includes:
the hydraulic inlet force sensor is electrically connected with the fracturing pump controller;
the hydraulic outlet sensor is electrically connected with the fracturing pump controller and is arranged at a liquid outlet of the fracturing pump;
a lubrication oil pressure sensor electrically connected with the fracturing pump controller;
the fracturing pump liquid level sensor is electrically connected with the fracturing pump controller;
the temperature sensor is electrically connected with the fracturing pump controller;
the fracturing pump controller is internally provided with an inlet fluid pressure threshold value, compares the actual inlet fluid pressure with the inlet fluid pressure threshold value, and controls the fracturing pump to stop if the actual inlet fluid pressure is greater than the inlet fluid pressure threshold value; the liquid outlet of the fracturing pump is of a Y-shaped structure, one end of the liquid outlet is communicated with one end of the electric regulating valve, the other end of the liquid outlet is communicated with the liquid injection pipe, the other end of the electric regulating valve is communicated with the liquid return port of the water tank, after the electric regulating valve is opened, the fracturing liquid of the liquid outlet of the fracturing pump partially enters the coal seam liquid injection hole, the other part of the fracturing liquid enters the water tank, impact of fracturing liquid in the coal seam liquid injection hole when the fracturing pump is opened is effectively buffered, and hole sealing operation of the liquid injection hole is guaranteed.
2. The frac pump stack control system of claim 1, further comprising:
the central control unit is electrically connected with the fracturing pump controller through the water tank controller;
the water tank sensor group is electrically connected with the water tank controller;
the electromagnetic pilot valve is electrically connected with the water tank controller;
the electric regulating valve is electrically connected with the water tank controller;
the first vacuum electromagnetic starter is electrically connected with the water tank controller;
and the booster pump motor is electrically connected with the first vacuum electromagnetic starter.
3. The frac pump set control system of claim 2, wherein the water tank sensor set comprises:
the water tank liquid level sensor is electrically connected with the water tank controller;
the reflux flow sensor is electrically connected with the water tank controller;
and the liquid outlet flow sensor is electrically connected with the water tank controller.
4. The frac pump set control system of claim 2, wherein the central control unit comprises:
the central controller is electrically connected with the water tank controller;
and the monitoring host is electrically connected with the central controller.
5. The fracturing pump set control system of claim 4, wherein said central controller is electrically connected to said water tank controller by an isolating coupler, and said monitoring host is electrically connected to said central controller by a signal converter.
6. The frac pump stack control system of claim 1, further comprising:
the second vacuum electromagnetic starter is electrically connected with the fracturing pump controller;
and the lubricating oil pump motor is electrically connected with the second vacuum electromagnetic starter.
7. The fracturing pump set control system of any of claims 1-6, wherein the fracturing pump motor is provided with a reference frequency point, the output frequency of the frequency converter is greater than or equal to the reference frequency point, the fracturing pump motor is a constant power motor, and the output frequency of the frequency converter is less than the reference frequency point, the fracturing pump motor is a constant torque motor.
8. A group control method based on the fracturing pump set control system of claims 1-7, comprising:
s1: inputting a target pressure value of the fracturing pump to a central control unit;
s2: the fracturing pump controller obtains the target pressure value through the central control unit, and obtains the actual pressure value of the fracturing pump through a fracturing pump sensor group;
s3: the fracturing pump controller controls the output frequency of the frequency converter to enable the actual pressure value to be smaller than the target pressure value;
s4: the fracturing pump controller increases the output frequency of the frequency converter along a gear so as to continuously increase the actual pressure value until the actual pressure value is greater than or equal to the target pressure value, and the fracturing pump controller judges whether the actual pressure value suddenly drops;
if the actual pressure value suddenly drops, the fracturing pump controller controls the frequency converter to close the fracturing pump motor;
if the actual pressure value does not drop suddenly, the target pressure value is increased, and the steps S3 to S4 are repeated.
9. The fracturing pump set control method of claim 8, wherein the fracturing pump controller controlling an output frequency of a frequency converter such that the actual pressure value is less than the target pressure value comprises:
the fracturing pump controller compares the target pressure value with the actual pressure value, and if the actual pressure value is greater than or equal to the target pressure value, the output frequency of the frequency converter is reduced until the actual pressure value is less than the target pressure value.
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| CN115638099B (en) * | 2022-12-26 | 2023-03-10 | 四川宏华电气有限责任公司 | Displacement distribution method for pump set of fracturing pump |
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| WO2015081328A1 (en) * | 2013-11-28 | 2015-06-04 | Data Automated Water Systems, LLC | Automated system for monitoring and controlling water transfer during hydraulic fracturing |
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| CN201730812U (en) * | 2010-08-11 | 2011-02-02 | 河南省煤层气开发利用有限公司 | Full automatic variable frequency control coal mine underground fracturing pump group |
| CN202545207U (en) * | 2012-04-01 | 2012-11-21 | 河南易安能源科技有限公司 | Intelligent variable-frequency control fracturing pump set |
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