CN113389528B - Performance testing device and method for underground cyclone sand remover - Google Patents
Performance testing device and method for underground cyclone sand remover Download PDFInfo
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- CN113389528B CN113389528B CN202110860005.1A CN202110860005A CN113389528B CN 113389528 B CN113389528 B CN 113389528B CN 202110860005 A CN202110860005 A CN 202110860005A CN 113389528 B CN113389528 B CN 113389528B
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- 239000004576 sand Substances 0.000 title claims abstract description 169
- 238000012360 testing method Methods 0.000 title claims abstract description 63
- 238000000034 method Methods 0.000 title claims description 18
- 239000012530 fluid Substances 0.000 claims abstract description 40
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 40
- 239000007788 liquid Substances 0.000 claims abstract description 31
- 239000000725 suspension Substances 0.000 claims abstract description 18
- 230000002572 peristaltic effect Effects 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 5
- 238000005303 weighing Methods 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000000926 separation method Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 description 6
- 210000002445 nipple Anatomy 0.000 description 6
- 239000003129 oil well Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000012216 screening Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 229920001285 xanthan gum Polymers 0.000 description 2
- 229940082509 xanthan gum Drugs 0.000 description 2
- 235000010493 xanthan gum Nutrition 0.000 description 2
- 239000000230 xanthan gum Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000010998 test 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
- E21B43/02—Subsoil filtering
- E21B43/08—Screens or liners
- E21B43/086—Screens with preformed openings, e.g. slotted liners
-
- 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
- E21B27/00—Containers for collecting or depositing substances in boreholes or wells, e.g. bailers, baskets or buckets for collecting mud or sand; Drill bits with means for collecting substances, e.g. valve drill bits
- E21B27/005—Collecting means with a strainer
-
- 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
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
-
- 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
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- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geophysics (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Cyclones (AREA)
Abstract
The invention provides a device for testing the performance of an underground cyclone desander, which simulates the underground operation environment of the desander through a sealed container, a sucker rod, the desander, a sand supply device and a water supply device, simulates fluids with different sand contents through the sand supply device and the water supply device, separates the fluids through the desander, obtains the weight of the separated liquid and sand and the suspension point load in the separation process, can determine the desanding efficiency of the desander aiming at the fluids with different sand contents according to the weight of the liquid and the sand, can determine the service life of the desander according to the suspension point load, and uses the obtained desanding efficiency and the service life as the theoretical basis for improving the structure of the desander, thereby being beneficial to optimizing the structure of the desander and improving the desanding efficiency.
Description
Technical Field
The invention belongs to the technical field of oil extraction engineering, and relates to a device and a method for testing the performance of an underground cyclone sand remover.
Background
The sucker-rod pump production system accounts for more than 80% of the total production of oil wells in China, in the production process, due to the reasons of low cementing strength of reservoir rock, unreasonable production system and the like, a rock framework is damaged, and formation sand flows into a shaft from the formation along with produced liquid, so that underground accidents such as shaft sand burying, abrasion and breakage of underground tools such as sucker rod oil pumps and the like, oil pipe leakage and the like are caused. In order to economically and effectively solve the problems caused by sand production of an oil well, the underground cyclone desander based on the liquid cyclone technology can realize sand-liquid separation, prevent sand from eroding and abrading underground equipment and achieve a good desanding effect.
The structure of whirl sand remover in the pit decides desanding efficiency and life of desander, consequently need survey the desanding efficiency and the life of current desander to the optimization of the structure of desander, but current indoor test mainly tests sand control efficiency of sand control screen pipe, and do not survey the desanding efficiency to whirl sand remover in the pit, and the desanding effect of whirl sand remover in the pit receives the structure of desander, the output of oil well (through the desanding fluid velocity of flow), the diameter of sand grain, the influence of factors such as life-span of desander, lead to the especially difficult of the survey of desanding efficiency and life.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a device and a method for testing the performance of an underground cyclone desander, which are used for testing the service life and the desanding efficiency of the underground cyclone desander under the conditions of different sand content and the influence of different underground cyclone desanders on the yield of an oil well through an indoor test.
The invention is realized by the following technical scheme:
1. a testing device for the performance of an underground cyclone desander is characterized by comprising a sealed container, a sucker rod pump, a sucker rod, a desander, a sand supply device and a water supply device;
the sucker-rod pump and the desander are assembled in a cavity of the sealed container, the lower end of the sucker-rod pump is connected with the desander, the upper end of the sucker-rod pump is connected with the sucker rod, the upper end of the sucker rod is connected with the load measuring device, the load measuring device is connected with the driving device, and the sand supply device and the water supply device are positioned outside the sealed container and are respectively connected with the desander and used for inputting sand-water mixed materials into the desander.
2. The device for testing the performance of the downhole cyclone desander as claimed in claim 1, wherein the sealed container is provided with an oil pipe in the cavity, and the sucker-rod pump and the desander are assembled in the oil pipe.
3. The device for testing the performance of the downhole cyclone sand remover as claimed in claim 2, wherein the upper end of the oil pipe is connected with the sand collecting box through a drainage pipeline, the lower end of the oil pipe is connected with the sand collecting box through a sand settling pipe, and a flow meter is arranged on the drainage pipeline.
4. The device for testing the performance of the downhole cyclone desander as claimed in claim 1, wherein the sand supply device comprises a sand supply tank and a peristaltic pump, one end of the peristaltic pump is connected with one end of the desander through a sand supply pipeline, the other end of the peristaltic pump is connected with the sand supply tank, and the sand supply tank is filled with sand.
5. The device for testing the performance of the downhole cyclone sand remover as claimed in claim 4, wherein the water supply device comprises a water supply tank, an outlet of the water supply tank is connected with a water supply pump, an outlet of the water supply pump is connected with a sand supply pipeline through a water supply pipeline, and a throttle valve is arranged on the water supply pipeline.
6. A sand removing efficiency test method of a test device for the performance of a downhole cyclone sand remover as claimed in any one of claims 1-5, characterized by comprising the following steps:
step 1, installing a desander to be tested in a testing device;
step 2, inputting a fluid with a set sand content into the desander;
step 3, separating the fluid by the desander, and respectively obtaining the weight of the liquid and the sand separated by the desander and the suspension point load of the desander in the desanding process;
step 4, determining the sand removing efficiency of the sand remover according to the weight of the sand and the liquid; determining the service life of the desander according to the suspension point load;
step 5, adjusting the sand content and repeating the steps 2-4 to obtain the sand removing efficiency and the service life of the sand remover corresponding to fluids with different sand contents;
and 6, replacing desanders of different models, and repeating the steps 2-5 to obtain the desanding efficiency and the service life of the desanders of different models under different sand content.
7. The method for testing the desanding efficiency of the device for testing the performance of the underground cyclone desander as claimed in claim 6, wherein in the step 3, the flow of the separated liquid is obtained according to a flowmeter, and the weight of the liquid is determined according to the flow; and drying and weighing the separated sand to obtain the weight of the sand.
8. The method for testing the sand removing efficiency of the device for testing the performance of the downhole cyclone sand remover as claimed in claim 6, wherein the method for determining the sand removing efficiency in the step 4 is as follows:
wherein, W 1 And W 2 The weight of sand and liquid respectively.
9. The method for testing the desanding efficiency of the device for testing the performance of the downhole cyclone desander as claimed in claim 6, wherein the method for determining the service life of the desander in the step 4 is as follows:
and when the measured suspension point load value is within the preset load range, the desander is in a normal state, and when the measured suspension point load value exceeds the preset load range, the time from the starting of the testing device to the moment is recorded, so that the service life of the desander is obtained.
10. The method for testing the sand removing efficiency of the device for testing the performance of the downhole cyclone sand remover as claimed in claim 6, wherein when the sand removing efficiency test is carried out, a fixed amount of fluid with a set sand content is input into the sand remover in the step 2, and the sand content of the fluid is adjusted in the step 5 and the total amount of the input fluid is kept unchanged.
Compared with the prior art, the invention has the following beneficial technical effects:
the invention provides a device for testing the performance of an underground cyclone desander, which simulates the underground operation environment of the desander through a sealed container, a sucker rod, the desander, a sand supply device and a water supply device, simulates fluids with different sand contents through the sand supply device and the water supply device, separates the fluids through the desander, obtains the weight of the separated liquid and sand and the suspension point load in the separation process, can determine the desanding efficiency of the desander aiming at the fluids with different sand contents according to the weight of the liquid and the sand, can determine the service life of the desander according to the suspension point load, and uses the obtained desanding efficiency and the service life as the theoretical basis for improving the structure of the desander, thereby being beneficial to optimizing the structure of the desander and improving the desanding efficiency.
Drawings
FIG. 1 is a schematic structural view of a desander performance testing device according to the present invention;
in the figure, 1, a driving device, 2, a load measuring device, 3, a sucker rod, 4, an oil pipe, 5, a liquid discharge pipeline, 6, a flowmeter, 7, an oil pipe fixing device, 8, a liquid collecting box, 9, a closed container, 10, an oil pipe short joint, 11, a sand remover, 12, a sand setting pipe, 13, a valve, 14, a sand collecting box, 15, a rod pump, 16, a sand supply pipeline, 17, a sand supply box, 18, a peristaltic pump, 19, a throttle valve, 20, a water supply pipeline, 21, a water supply box and 22, a water supply pump are arranged.
Detailed Description
The present invention will now be described in further detail with reference to the attached drawings, which are illustrative, but not limiting, of the present invention.
Referring to fig. 1, the device for testing the performance of the underground cyclone desander comprises a sealed container 9, an oil pipe 4, a sucker rod pump 15, a sucker rod 3, a desander 11, a sand supply device and a water supply device.
The oil pipe is assembled in a cavity of the sealed container 9 and is fixed through an oil pipe fixing device, the sucker rod pump 15 and the desander 11 are assembled in the oil pipe, the lower end of the sucker rod pump 15 is connected with the upper end of the oil pipe nipple 10, the lower end of the oil pipe nipple 10 is connected with the desander 11, the upper end of the sucker rod pump 15 is connected with the sucker rod 3, the upper end of the sucker rod 3 is connected with the load measuring device 2, the load measuring device 2 is connected with the driving device, the sand supply device and the water supply device are located outside the sealed container 9 and are respectively connected with the desander and used for inputting sand-water mixed materials into the desander.
The upper end of the oil pipe is connected with a liquid collecting box 8 through a liquid drainage pipeline 5, the lower end of the sealed container is connected with a sand collecting box 14 through a sand setting pipe 12, the inlet of the sand setting pipe 12 is positioned at the lower end of the sand remover, and a valve 13 is arranged on the sand setting pipe 12; a flow meter 6 is arranged on the liquid discharge line 5.
The sand supply device comprises a sand supply box 17 and a peristaltic pump 18, one end of the peristaltic pump 18 is connected with one end of the desander through a sand supply pipeline 16, the other end of the peristaltic pump 18 is connected with the sand supply box 17, and the sand supply box 17 is filled with sand materials.
The water supply device comprises a water supply tank 21, an outlet of the water supply tank is connected with a water supply pump 22, an outlet of the water supply pump 22 is connected with a sand supply pipeline 16 through a water supply pipeline 20, a throttle valve 19 is arranged on the water supply pipeline 20, and water and sand materials form fluid with a certain sand content in the sand supply pipeline to enter the desander 11.
The water supply tank 21 is filled with a xanthan gum aqueous solution for simulating the viscosity of petroleum, and the proportion of the xanthan gum can be adjusted to simulate petroleum with different viscosities.
When the testing device is started, the peristaltic pump 17 and the water feed pump 22 are opened to pump the fluid mixed with sand and water into the sand remover 11 according to a certain proportion, the driving device 1 is opened to drive the sucker rod 2 to reciprocate up and down, the sucker rod 2 moves in the oil pipe 4 to drive the rod pump 15 to suck the fluid separated by the sand remover 11 out, the fluid flows into the liquid collecting tank 8 along the liquid drainage pipeline 5, the sand removers 11 with different specifications are installed at the lower end of the rod pump 15 through the oil pipe nipple 10, the sand separated by the sand remover enters the sand setting pipe 12, and the valve 13 is opened after a period of time to collect the sand in the sand setting pipe 12 into the sand collecting box 14.
The testing method of the performance testing device for the underground cyclone desander provided by the invention comprises a desanding efficiency testing method of the desander, a service life testing method of the desander and a suspension point load testing method of the desander.
Example 1
The sand removing efficiency testing method of the performance testing device of the underground cyclone sand remover comprises the following steps:
step 1, installing a sand remover to be tested at the lower end of an oil pipe nipple 10.
Step 2, starting a testing device, and inputting quantitative fluid with a set sand content into the desander;
specifically, a certain amount of sand-containing fluid is pumped into the sand remover 11 through the water feeding pump 22 and the peristaltic pump 18, meanwhile, the driving device 1 is used for providing power to drive the sucker rod 3 to drive the sucker rod pump 15 to suck the fluid into the liquid collecting tank 8, then the testing device is closed, and the sand in the sand setting pipe 12 is guided into the sand collecting box 14.
The measured amount of fluid is a predetermined weight of fluid.
Step 3, drying and weighing the sand in the sand collection box 14, and simultaneously weighing the liquid in the sand collection box 8, wherein the weights of the sand and the liquid are W respectively 1 And W 2 。
And 4, determining the sand removing efficiency of the sand remover according to the weight of the sand and the liquid.
And 5, adjusting the sand content and keeping the total weight of the fluid unchanged, and repeating the steps 2-4 to obtain the sand removing efficiency of the sand remover corresponding to fluids with different sand contents.
And 6, replacing desanders of different models, repeating the steps 2-5 to obtain the desanding efficiency of the desanders of different models under different sand content rates, measuring the desanding efficiency of the desanders of different rotational flow angles and different cone lengths, screening the desander with the highest desanding efficiency, and accordingly, carrying out structural optimization on the desanders of other models.
Example 2
The service life testing method of the performance testing device of the underground cyclone sand remover comprises the following steps:
step 1, installing a sand remover to be tested at the lower end of an oil pipe nipple 10.
Step 2, starting a testing device, and inputting a fluid with a set sand content into the desander;
continuously pumping sand-containing fluid with a certain sand content rate into the underground cyclone desander 11 through the feed pump 22 and the peristaltic pump 18, driving the sucker rod 3 to drive the sucker rod pump 15 to pump the fluid into the liquid collecting tank 8 by utilizing the power provided by the driving device 1, observing the change of the load measuring device, and recording the normal working time of the underground desander
And 3, determining the service life of the desander according to the measured suspension point load value of the load measuring device in the working process of the testing device.
Specifically, when the measured suspension point load value is within a preset load range, the desander is in a normal state, when the measured suspension point load value exceeds the preset load range, the desander is judged to be damaged, the time from the start of the testing device to the moment is recorded, and the service life of the desander is obtained.
And 4, adjusting the sand content in the fluid, and repeating the steps 2 and 3 to obtain the service life of the desander corresponding to fluids with different sand contents.
And 5, replacing desanders of different models, repeating the steps 2-4 to obtain the service lives of the desanders of different models under different sand containing rates, and screening the desander with the highest service life to optimize the structures of other desanders.
Example 3
The suspension point load testing method of the performance testing device of the underground cyclone desander comprises the following steps:
step 1, installing a sand remover to be tested at the lower end of an oil pipe nipple 10.
Step 2, starting a testing device, and inputting a fluid with a set sand content into the desander within a set time range;
sand-containing fluid is pumped into the desander 11 through the feed pump 22 and the peristaltic pump 18 for a prescribed time while the sucker rod 3 drives the sucker rod pump 15 to pump the fluid into the catch tank 8, powered by the drive unit 1.
And 3, acquiring the load value of the suspension point measured by the load measuring device 2, and acquiring the flow value of the liquid by the flowmeter.
The flow rate of this liquid is expressed as the production of the well.
And 4, adjusting the sand content in the fluid, and repeating the steps 2 and 3 to obtain fluid flow values of the desander corresponding to different sand contents.
And 5, replacing desanders of different models, and repeating the steps 2-4 to obtain flow values of the desanders of different models under different sand contents.
And screening the desanders which have great influence on the oil well yield according to the flow values of the desanders of different models under different sand content rates, thereby optimizing the structures of other desanders.
The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (8)
1. A testing device for the performance of a down-hole cyclone sand remover is characterized by comprising a sealed container (9), a sucker rod pump (15), a sucker rod (3), a sand remover (11), a sand supply device and a water supply device;
the sucker rod pump (15) and the desander (11) are assembled in a cavity of the sealed container (9), the lower end of the sucker rod pump (15) is connected with the desander (11), the upper end of the sucker rod pump (15) is connected with the sucker rod (3), the upper end of the sucker rod (3) is connected with the load measuring device (2), the load measuring device (2) is connected with the driving device, the sand supply device and the water supply device are positioned outside the sealed container (9) and are respectively connected with the desander and used for inputting sand-water mixed materials to the desander;
the sand removing efficiency testing method of the testing device for the performance of the underground cyclone sand remover comprises the following steps:
step 1, installing a desander to be tested in a testing device;
step 2, inputting a fluid with a set sand content into the desander;
step 3, separating the fluid by the desander, and respectively obtaining the weight of the liquid and the sand separated by the desander and the suspension point load of the desander in the desanding process;
step 4, determining the sand removing efficiency of the sand remover according to the weight of the sand and the liquid; determining the service life of the desander according to the suspension point load;
the method for determining the sand removing efficiency in the step 4 comprises the following steps:
wherein, W 1 And W 2 The weight of sand and liquid respectively;
step 5, adjusting the sand content and repeating the steps 2-4 to obtain the sand removing efficiency and the service life of the sand remover corresponding to fluids with different sand contents;
and 6, replacing desanders of different models, and repeating the steps 2-5 to obtain the desanding efficiency and the service life of the desanders of different models under different sand content.
2. A device for testing the performance of a down-hole cyclone desander as claimed in claim 1, characterized in that the sealed container (9) is provided with an oil pipe (4) in the cavity, and the sucker-rod pump (15) and the desander (11) are fitted in the oil pipe.
3. The device for testing the performance of the downhole cyclone sand remover according to the claim 2, characterized in that the upper end of the oil pipe is connected with the collecting tank (8) through a drainage pipeline (5), the lower end of the oil pipe is connected with the sand collecting box (14) through a sand settling pipe (12), and a flow meter (6) is arranged on the drainage pipeline (5).
4. The device for testing the performance of the downhole cyclone desander as claimed in claim 1, wherein the sand supply device comprises a sand supply box (17) and a peristaltic pump (18), one end of the peristaltic pump (18) is connected with one end of the desander through a sand supply pipeline (16), the other end of the peristaltic pump (18) is connected with the sand supply box (17), and the sand supply box (17) is filled with sand.
5. A device for testing the performance of a down-hole cyclone sand remover as claimed in claim 4, wherein said water supply device comprises a water supply tank (21), the outlet of the water supply tank is connected with a feed pump (22), the outlet of the feed pump (22) is connected with a sand supply pipeline (16) through a water supply pipeline (20), and a throttle valve (19) is arranged on the water supply pipeline (20).
6. The method for testing the desanding efficiency of the device for testing the performance of the downhole cyclone desander as claimed in claim 1, wherein in the step 3, the flow of the separated liquid is obtained according to a flowmeter, and the weight of the liquid is determined according to the flow; and drying and weighing the separated sand to obtain the weight of the sand.
7. The method for testing the desanding efficiency of the device for testing the performance of the downhole cyclone desander as claimed in claim 1, wherein the method for determining the service life of the desander in the step 4 is as follows:
and when the measured suspension point load value is within the preset load range, the desander is in a normal state, and when the measured suspension point load value exceeds the preset load range, the time from the starting of the testing device to the moment is recorded, so that the service life of the desander is obtained.
8. The method for testing the sand removing efficiency of the device for testing the performance of the downhole cyclone sand remover as claimed in claim 1, wherein when the sand removing efficiency test is carried out, a fixed amount of fluid with a set sand content is input into the sand remover in the step 2, and the sand content of the fluid is adjusted in the step 5 and the total amount of the input fluid is kept unchanged.
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| CN202110860005.1A CN113389528B (en) | 2021-07-28 | 2021-07-28 | Performance testing device and method for underground cyclone sand remover |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102094803B (en) * | 2010-11-24 | 2013-03-27 | 中国石油天然气股份有限公司 | Multifunctional sucker-rod pump hoisting simulation test system |
| US8793080B1 (en) * | 2011-04-27 | 2014-07-29 | InSpatial LLC | Sucker rod load measurement |
| CN104453794B (en) * | 2014-11-20 | 2017-05-17 | 中国科学院广州能源研究所 | Simulation experiment system for whole process of natural gas hydrate exploitation and simulation method |
| CN205175721U (en) * | 2015-12-08 | 2016-04-20 | 燕山大学 | Require experimental suspension point load analogue means in beam -pumping unit factory |
| CN107842357B (en) * | 2017-11-30 | 2023-06-13 | 青岛海洋地质研究所 | System and method for testing characteristic curve of artificial lifting centrifugal pump for hydrate exploitation |
| CN108661924B (en) * | 2018-04-28 | 2019-12-17 | 中国石油集团海洋工程有限公司 | Lifting pump sand discharge capacity testing method |
| CA3115069C (en) * | 2018-10-11 | 2022-01-11 | Conocophillips Company | Skid mounted wellhead desanders and flowback systems |
| CN111924931B (en) * | 2019-05-13 | 2022-05-24 | 中国石油化工股份有限公司 | Model selection method of desanding cyclone for polymer injection back discharge treatment |
| CN111502567B (en) * | 2020-04-15 | 2021-12-21 | 常州大学 | Underground rotational flow sand discharge experiment device and measurement method for sand-containing geothermal well |
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