CN111058821A - Intermittent three-cylinder 3000-horsepower high-power fracturing pump and working method thereof - Google Patents
Intermittent three-cylinder 3000-horsepower high-power fracturing pump and working method thereof Download PDFInfo
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- CN111058821A CN111058821A CN201911419184.4A CN201911419184A CN111058821A CN 111058821 A CN111058821 A CN 111058821A CN 201911419184 A CN201911419184 A CN 201911419184A CN 111058821 A CN111058821 A CN 111058821A
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- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000012545 processing Methods 0.000 claims abstract description 19
- 239000012530 fluid Substances 0.000 claims description 13
- 238000005253 cladding Methods 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 210000000078 claw Anatomy 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 3
- 238000004372 laser cladding Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 3
- 238000005457 optimization Methods 0.000 claims description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 5
- 230000007774 longterm Effects 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 7
- 238000005299 abrasion Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002929 anti-fatigue Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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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
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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
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or 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
- F04B49/06—Control using electricity
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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
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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
- F04B53/10—Valves; Arrangement of valves
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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
- F04B53/14—Pistons, piston-rods or piston-rod connections
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geophysics (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The invention provides an intermittent three-cylinder 3300 horsepower high-power fracturing pump which comprises a power end, a pressure sensor, a hydraulic end, a temperature sensor, a flow sensor, a data processing unit and a rack, wherein the power end is connected with the pressure sensor; the power end and the hydraulic end are respectively arranged at the two ends of the frame; the hydraulic end is assembled by three groups of valve bodies which are mutually communicated; the pressure sensor is fixedly arranged at the output end of the hydraulic end; the temperature sensor is fixedly arranged on one side of the hydraulic end; the flow sensor is fixedly arranged at the other output end of the hydraulic end; the pressure sensor, the temperature sensor and the flow sensor are electrically connected to the data processing unit; the data processing unit is used for processing data and sending out instructions. Meanwhile, a corresponding working method is also provided, and the fracturing pump is designed into an intermittent working mode, namely measures are taken to enable the fracturing pump to return to a normal non-working state after continuously running for a certain time at high temperature and ultrahigh pressure, so that long-term use of the pump is ensured, and the service life of the fracturing pump is prolonged.
Description
Technical Field
The invention belongs to the field of machinery, and relates to an intermittent three-cylinder 3000-horsepower high-power fracturing pump and a working method thereof.
Background
The global shale gas resource is about 456 trillion cubic meters, and is mainly distributed in north america, central asia, china, ramee, the middle east, north africa, and the former soviet union, with north america being the most abundant. The amount of the shale gas recoverable resources in China is 25 trillions of cubic meters, and in 2013, EIA (world energy institute) has carried out a new round of shale gas resource assessment, and assessment areas comprise Sichuan basins, Tarim basins, QusongEr basins, Songliao basins, Yangzi basins, Jianghan basins and Subei basins in China. The result shows that the geological resource amount of the shale gas in China is 134.4 billion cubic meters, and the technical recoverable resource amount is 31.6 trillion cubic meters. Far beyond the united states, only less than russia and second globally.
To release natural gas deep hidden in hard shale, the current technology matured in the united states is to exploit shale gas using horizontal well + hydraulic fracturing technology. This requires a fracturing truck equipped with a fracturing pump.
The fracturing pump is in a severe working environment and is operated under the conditions of high temperature and high pressure of slurry for a long time, so that the local damage of the fracturing pump is easily caused, and the service life is influenced. Companies in foreign countries have been reminded to work intermittently in the user's operating manual in order to extend the service life of the fracturing pump, but no specific operating methods and principles have been given.
Most fracturing pumps produced at home and abroad are medium and small ultrahigh pressure three-cylinder piston pumps with 1500 horsepower; medium and high power fracturing pumps in excess of 2000 horsepower are typically five cylinder piston pumps.
The five-cylinder piston pump is large in size and weight, a fracturing pump with more than 2500 horsepower is difficult to assemble on a mobile fracturing truck, and application is limited.
Because most of domestic shale gas is stored in a deep place of more than 1000 meters on the ground, a fracturing pump with higher power is expected to be assembled on a fracturing truck for shale gas exploitation. At present, although a 4000 horsepower high-power fracturing pump is developed, the size and the weight are overlarge, and the problem of piston rod shaking caused by the increase of the piston stroke of the three-cylinder high-power fracturing pump is difficult to assemble on a movable fracturing truck for popularization and use.
Disclosure of Invention
The invention provides an intermittent three-cylinder 3300 horsepower high-power fracturing pump, which is designed into an intermittent working mode, namely measures are taken to ensure that the fracturing pump returns to a normal non-working state after continuously running for a certain time at high temperature and ultrahigh pressure so as to ensure long-term use of the pump and prolong the service life of the fracturing pump.
The specific technical scheme is as follows: the device comprises a power end, a pressure sensor, a hydraulic end, a temperature sensor, a flow sensor, a data processing unit and a rack; the power end and the hydraulic end are respectively arranged at two ends of the rack; the hydraulic end is assembled by three groups of valve bodies which are communicated with each other; the pressure sensor is fixedly arranged at the output end of the hydraulic end; the temperature sensor is fixedly arranged on one side of the hydraulic end; the flow sensor is fixedly arranged at the other output end of the hydraulic end; the pressure sensor, the temperature sensor and the flow sensor are electrically connected to the data processing unit; the data processing unit is used for processing data and sending out an instruction.
The improved fracturing fluid inlet device is characterized by further comprising a driving motor and a fracturing fluid inlet end, wherein the driving motor is driven by hydraulic pressure, a connecting rod is driven by a crankshaft, and a piston is driven by the connecting rod to reciprocate, so that the fracturing fluid is input from the fracturing fluid inlet end and then is pressurized to the pressure in the hydraulic end and then is output.
As an improvement, a high-pressure cavity stop valve core, a high-pressure cavity stop valve spring, a low-pressure cavity stop valve core and a low-pressure cavity stop valve spring are arranged in each group of valve bodies of the hydraulic end along the radial direction.
As a modification, the connecting point of the crankshaft and the piston is arranged at the midpoint position of the piston; the angle of the crankshaft rotation center deviating from the center line of the piston moving direction is set to be 10-45 degrees.
As an improvement, the valve body is formed by a laser cladding process for four claws, the thickness of cladding metal is 1-50cm, and the combination of the valve body and the valve seat is realized.
As an improvement, the hydraulic end is formed by assembling four groups of valve bodies which are mutually communicated, when the hydraulic end works, any one of the three groups of valve bodies works, and one group of valve bodies does not work.
Meanwhile, a working method adopting the fracturing pump is also provided, and the working method comprises the following specific steps:
(I) installing multiple sets of sensors
Fixedly mounting a pressure sensor above the hydraulic end; the temperature sensors are arranged into two groups, one group of oil temperature sensors is responsible for detecting the temperature of oil, and the other group of bearing outer ring temperature sensors is arranged at the position of the bearing outer ring; the flow sensor is fixedly arranged at the output end of the hydraulic end and is used for detecting the liquid flow of the high-pressure outlet;
(II) real-time measurement and data transmission
Real-time data of the sensor in the step (I) including flow, pressure and temperature values are measured in real time and are transmitted to a data processing unit;
(III) instruction communication
After the real-time data are compared with the optimized curve in the step (II), the alarm device is started after the flow, pressure and temperature values are confirmed to exceed the standard threshold value, and a corresponding instruction is sent to stop driving the rotating speed of the motor; and (d) after the real-time data in the step (II) are compared with the optimization curve, confirming that the flow, pressure and temperature values are within the standard threshold range, and sending out a corresponding warning signal after keeping normal work of the driving motor for a period of time.
As an improvement, the hydraulic end of the intermittent three-cylinder 3000-horsepower high-power fracturing pump is formed by assembling four groups of valve bodies, and continuous working time of the four groups of valve bodies is set to ensure that any three groups of valve bodies work normally and one group of valve bodies stops working during continuous working.
Has the advantages that: according to the intermittent three-cylinder 3300 horsepower high-power fracturing pump provided by the invention, the fracturing pump is designed to be in an intermittent working mode, namely measures are taken to ensure that the fracturing pump returns to a normal non-working state after continuously running for a certain time at high temperature and ultrahigh pressure, so that the long-term use of the pump is ensured, and the service life of the fracturing pump is prolonged. On the basis of the development of fracturing pumps at home and abroad, an intermittent three-cylinder plunger 3300 horsepower high-power fracturing pump is innovatively developed for the first time, and the intermittent operation is realized by adding a sensor on a pump body and sending an instruction to control the rotating speed of a driving motor through an intelligent controller according to the running state of the fracturing pump so as to prolong the fracturing service life of the pump.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.
Drawings
Fig. 1 is a schematic view of the overall structure of the fracturing pump along the direction D.
Fig. 2 is a cross-sectional bottom view of the fracturing pump of the present invention taken along direction D-D.
Fig. 3 is a top view of the fracturing pump of the present invention.
In the drawings: 1. a power end; 2. a pressure sensor; 3. a fluid end; 4. a temperature sensor; 5. a fracturing fluid inlet end; 6. a flow sensor; 7. a frame; 8. a power end input shaft; 9. an oil temperature sensor; 10. a crankshaft; 11. a connecting rod; 12. a piston; 13. a high pressure chamber stop valve core; 14. a high pressure chamber shut-off valve spring; 15. a low pressure chamber stop valve core; 16. a low pressure chamber shut-off valve spring.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
An intermittent three-cylinder 3300 horsepower high-power fracturing pump comprises a power end 1, a pressure sensor 2, a hydraulic end 3, a temperature sensor 4, a flow sensor 6, a data processing unit, a rack 7 and a power end input shaft 8; the power end 1 and the hydraulic end 3 are respectively arranged at two ends of the frame 7, wherein the power end 1 is fixedly provided with a power end input shaft 8.
The hydraulic end 3 is assembled by three groups of valve bodies which are communicated with each other, and the three hydraulic ends are made into three independent assembled structures by utilizing the characteristic that the structural size of the three-cylinder pump is reduced, so that the pump head with large abrasion can be replaced to run urgently, and the production cost is greatly saved.
The pressure sensor 2 is fixedly arranged at the output end of the hydraulic end 3; the temperature sensor 4 is fixedly arranged on one side of the hydraulic end 3; the flow sensor 6 is fixedly arranged at the other output end of the hydraulic end 3; the pressure sensor 2, the temperature sensor 4 and the flow sensor 6 are electrically connected to the data processing unit; the data processing unit is used for processing data and sending out instructions. Through increasing the sensor on the pump body, send the instruction control driving motor rotational speed through intelligent control ware according to fracturing pump running state, realize intermittent type formula work to extension pump pressure splits life.
The fracturing fluid inlet end 5 is driven by hydraulic pressure, the connecting rod 11 is driven by the crankshaft 10, and the piston 12 is driven by the connecting rod 11 to reciprocate, so that the fracturing fluid is pressurized in the hydraulic end 3 and then is output after being input from the fracturing fluid inlet end 5.
The interior of each group of valve bodies of the hydraulic end 3 is provided with a high-pressure cavity stop valve core 13, a high-pressure cavity stop valve spring 14, a low-pressure cavity stop valve core 15 and a low-pressure cavity stop valve spring 16 along the radial direction.
The connecting point of the crankshaft 10 and the piston 12 is arranged at the midpoint position of the piston 12 so as to achieve uniform stress; the rotation center of the crankshaft 10 is arranged to deviate from the center line of the piston 12 in the moving direction by an angle of 10-45 degrees, so that the effects of the optimal stress state, the minimum power consumption and the optimal efficiency are achieved.
The valve body four claws adopt a laser cladding process, the thickness of cladding metal is 1-50cm, the cladding metal reduces the abrasion influence and the cost, and meanwhile, the abrasion resistance of the joint surface of the valve body and the valve seat is realized, and the anti-fatigue life is prolonged.
The parts related to the hydraulic end 3 are made of a unique stainless steel new material with high strength and excellent comprehensive mechanical properties, and can withstand the tests of high pressure, alternating load and corrosive environment, so that the service life of the fracturing pump is prolonged, and the operation reliability of the fracturing pump is improved.
Wherein, temperature sensor can set up to the multiunit, and one of them is oil temperature sensor 9 for be responsible for detecting fluid temperature, and a set of bearing inner race temperature sensor sets up in the bearing inner race position, is used for detecting the bearing inner race temperature.
Meanwhile, a working method adopting the fracturing pump is also provided, and the working method comprises the following specific steps:
(I) installing multiple sets of sensors
Fixedly mounting a pressure sensor above the hydraulic end; the temperature sensors are arranged into two groups, one group of oil temperature sensors is responsible for detecting the temperature of oil, and the other group of bearing outer ring temperature sensors is arranged at the position of the bearing outer ring; the flow sensor is fixedly arranged at the output end of the hydraulic end and is used for detecting the liquid flow of the high-pressure outlet;
(II) real-time measurement and data transmission
Real-time data of the sensor in the step (I) including flow, pressure and temperature values are measured in real time and are transmitted to a data processing unit;
(III) instruction communication
After the real-time data are compared with the optimized curve in the step (II), the alarm device is started after the flow, pressure and temperature values are confirmed to exceed the standard threshold value, and a corresponding instruction is sent to stop driving the rotating speed of the motor; and (d) after the real-time data in the step (II) are compared with the optimization curve, confirming that the flow, pressure and temperature values are within the standard threshold range, and sending out a corresponding warning signal after keeping normal work of the driving motor for a period of time.
Wherein, the hydraulic end 3 is assembled by three or four groups of valve bodies which are mutually communicated. When the hydraulic end of the intermittent three-cylinder 3000-horsepower high-power fracturing pump is formed by assembling four groups of valve bodies, continuous working time of the four groups of valve bodies is set, so that when the three groups of valve bodies work continuously, any three groups of valve bodies work normally, and one group of valve bodies stops working. The three valve bodies work simultaneously, the third valve body can set the running time according to the running condition of the valve bodies, the rotation outage of the four valve bodies is realized, and the service life is prolonged.
Meanwhile, the valve can be directly assembled by three groups of valve bodies to directly carry out all work.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (8)
1. The utility model provides a 3000 horsepower high-power fracturing pumps of intermittent type formula three-cylinder which characterized in that: the device comprises a power end (1), a pressure sensor (2), a hydraulic end (3), a temperature sensor (4), a flow sensor (6), a data processing unit and a rack (7); the power end (1) and the hydraulic end (3) are respectively arranged at two ends of the rack (7); the hydraulic end (3) is assembled by three groups of valve bodies which are mutually communicated; the pressure sensor (2) is fixedly arranged at the output end of the hydraulic end (3); the temperature sensor (4) is fixedly arranged on one side of the hydraulic end (3); the flow sensor (6) is fixedly arranged at the other output end of the hydraulic end (3); the pressure sensor (2), the temperature sensor (4) and the flow sensor (6) are electrically connected to the data processing unit; the data processing unit is used for processing data and sending out an instruction.
2. The intermittent three-cylinder 3000 horsepower high power fracturing pump of claim 1, wherein: still include driving motor, fracturing fluid entry end (5), driving motor adopts hydraulic drive, through bent axle (10) drive connecting rod (11), drives piston (12) reciprocating motion through connecting rod (11), makes the fracturing fluid follow fracturing fluid entry end (5) input back in the pressure end (3) pressure boost arrive export after the pressure.
3. The intermittent three-cylinder 3000 horsepower high power fracturing pump of claim 1, wherein: and a high-pressure cavity stop valve core (13), a high-pressure cavity stop valve spring (14), a low-pressure cavity stop valve core (15) and a low-pressure cavity stop valve spring (16) are arranged in each group of valve bodies of the hydraulic end (3) along the radial direction.
4. The intermittent three-cylinder 3000 horsepower high power frac pump of claim 2, wherein: the connecting point of the crankshaft (10) and the piston (12) is arranged at the midpoint position of the piston (12); the angle of the rotation center of the crankshaft (10) deviating from the center line of the moving direction of the piston (12) is set to be 10-45 degrees.
5. The intermittent three-cylinder 3000 horsepower high power fracturing pump of claim 1, wherein: the four claws of the valve body adopt a laser cladding process, the thickness of cladding metal is 1-50cm, and the combination of the valve body and the valve seat is realized.
6. The intermittent three-cylinder 3000 horsepower high power fracturing pump of claim 1, wherein: the hydraulic end (3) is formed by assembling four groups of valve bodies which are mutually communicated, any one of the three groups of valve bodies works when the hydraulic end works, and one group of valve body does not work.
7. A method of operating an intermittent three cylinder 3000 horsepower high power frac pump according to any one of claims 1-6, wherein: the method comprises the following specific steps:
(I) installing multiple sets of sensors
The pressure sensor (2) is fixedly arranged above the hydraulic end (3); the temperature sensors (4) are arranged into two groups, one group of oil temperature sensors (9) are responsible for detecting the temperature of oil, and the other group of bearing outer ring temperature sensors are arranged at the position of the bearing outer ring; the flow sensor (6) is fixedly arranged at one output end of the hydraulic end (3) and is used for detecting the liquid flow of the high-pressure outlet;
(II) real-time measurement and data transmission
Real-time data of the sensor in the step (I) including flow, pressure and temperature values are measured in real time and are transmitted to a data processing unit;
(III) instruction communication
After the real-time data are compared with the optimized curve in the step (II), the alarm device is started after the flow, pressure and temperature values are confirmed to exceed the standard threshold value, and a corresponding instruction is sent to stop driving the rotating speed of the motor; and (d) after the real-time data in the step (II) are compared with the optimization curve, confirming that the flow, pressure and temperature values are within the standard threshold range, and sending out a corresponding warning signal after keeping normal work of the driving motor for a period of time.
8. The method of operation of claim 7, wherein: the hydraulic end (3) of the intermittent three-cylinder 3000-horsepower high-power fracturing pump is formed by splicing and assembling four groups of valve bodies, and continuous working time of the four groups of valve bodies is set to ensure that any three groups of valve bodies work normally and one group of valve bodies stops working during continuous working.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911419184.4A CN111058821A (en) | 2019-12-31 | 2019-12-31 | Intermittent three-cylinder 3000-horsepower high-power fracturing pump and working method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911419184.4A CN111058821A (en) | 2019-12-31 | 2019-12-31 | Intermittent three-cylinder 3000-horsepower high-power fracturing pump and working method thereof |
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| CN111058821A true CN111058821A (en) | 2020-04-24 |
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| CN201911419184.4A Withdrawn CN111058821A (en) | 2019-12-31 | 2019-12-31 | Intermittent three-cylinder 3000-horsepower high-power fracturing pump and working method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115506762A (en) * | 2021-06-03 | 2022-12-23 | 中国石油天然气集团有限公司 | Method and device for detecting hydraulic end fault of fracturing pump |
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2019
- 2019-12-31 CN CN201911419184.4A patent/CN111058821A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115506762A (en) * | 2021-06-03 | 2022-12-23 | 中国石油天然气集团有限公司 | Method and device for detecting hydraulic end fault of fracturing pump |
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Application publication date: 20200424 |