CN113125307A - Method and device for evaluating drag reducer of finished oil - Google Patents
Method and device for evaluating drag reducer of finished oil Download PDFInfo
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- CN113125307A CN113125307A CN201911418229.6A CN201911418229A CN113125307A CN 113125307 A CN113125307 A CN 113125307A CN 201911418229 A CN201911418229 A CN 201911418229A CN 113125307 A CN113125307 A CN 113125307A
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- 239000003638 chemical reducing agent Substances 0.000 title claims abstract description 96
- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000000700 radioactive tracer Substances 0.000 claims abstract description 74
- 238000012360 testing method Methods 0.000 claims abstract description 48
- 238000011156 evaluation Methods 0.000 claims abstract description 30
- 238000010008 shearing Methods 0.000 claims abstract description 27
- 230000000694 effects Effects 0.000 claims abstract description 9
- 239000003814 drug Substances 0.000 claims description 32
- 238000002347 injection Methods 0.000 claims description 30
- 239000007924 injection Substances 0.000 claims description 30
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 13
- 238000001514 detection method Methods 0.000 claims description 12
- 238000010926 purge Methods 0.000 claims description 9
- 238000011144 upstream manufacturing Methods 0.000 claims description 9
- 238000011084 recovery Methods 0.000 claims description 8
- 229910052757 nitrogen Inorganic materials 0.000 claims description 7
- 238000011160 research Methods 0.000 claims description 7
- 238000005070 sampling Methods 0.000 claims description 6
- 238000002474 experimental method Methods 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 5
- 238000012854 evaluation process Methods 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 2
- 238000007789 sealing Methods 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 4
- 238000005086 pumping Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000005520 electrodynamics Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N11/00—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties
- G01N11/02—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by measuring flow of the material
- G01N11/04—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by measuring flow of the material through a restricted passage, e.g. tube, aperture
- G01N11/08—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by measuring flow of the material through a restricted passage, e.g. tube, aperture by measuring pressure required to produce a known flow
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The invention discloses a device and a method for evaluating a drag reducer of finished oil. The device comprises a closed-loop test pipeline, an oil product filling device to be tested, a drag reducer filling device, a non-shear pump, a centrifugal pump, a tracer filling device, a tracer interface detector, a flowmeter and a plurality of pressure sensors; the centrifugal pump and the non-shearing pump are arranged on the test pipeline in parallel; the tracer filling device is arranged on a pipeline of the drag reducer filling device, and the tracer interface detector is arranged on the test pipeline and is opposite to the inlet position of the drag reducer filling pipe on the test pipeline. The invention can realize the evaluation of the drag reduction and delivery increase effect of the drag reducer, the evaluation of the influence of on-way shearing on the drag reducer and the evaluation of the influence of over-pump shearing on the drag reducer, and can evaluate the attenuation performance of the drag reducer.
Description
Technical Field
The invention relates to the field of experimental loop devices, in particular to a method and a device for evaluating a drag reducer of finished oil.
Technical Field
Pipeline transportation plays an increasingly important role in the petroleum and natural gas industry and even the world economy, increases the output of oil and gas long-distance pipelines, reduces the flow resistance in the oil and gas transportation process, reduces the energy consumption and the operation cost of pipeline transportation, improves the operation elasticity, the safety and the economy of the pipelines, and is an important subject which is continuously researched and solved by pipeline science and technology workers for many years.
The chemical additive is used to reduce the friction resistance of pipeline system and increase the conveying capacity, and has important significance in saving energy and investment and accelerating the development and utilization of oil products. The drag reducer is a relatively effective chemical additive for pipelines, can quickly and economically expand the pipeline transportation capacity, and is an important means for improving the pipeline circulation capacity and reducing energy consumption in a specific period and a specific section. The frictional pressure drop (or frictional resistance) restricts the flow of fluid in the pipe, resulting in a decrease in pipe throughput or an increase in energy consumption. The fluid is injected with a small amount of high molecular polymer, which can reduce the flow resistance under turbulent flow condition, and the method is called high polymer drag reduction. Chemical agents used to reduce the resistance to fluid flow are known as drag reducing agents. The addition of the drag reducer into the finished oil pipeline is an effective way for improving the pipeline transportation efficiency, and in the process of developing the drag reducer, performance evaluation of drag reduction and transportation increase of the drag reducer, research on operation development rules and the like are completed by means of experiment loop experiments.
The existing experimental device mostly adopts a mode of uniformly mixing the drag reducer and the oil product in a stirring system and then injecting the mixture into a test loop, and the off-line injection mode can only evaluate the effect of the drag reducer on increasing, conveying and reducing resistance, but cannot realize the drag reducer on-line injection process which completely simulates the actual working condition, and cannot research the diffusion rule, the pump passing, the on-line shearing damage rule and the like of the drag reducer.
Disclosure of Invention
The invention aims to provide a method and a device for evaluating a drag reducer of finished oil, which are used for realizing the research on the performance evaluation, the shearing failure rule and the like of the drag reducer.
In order to solve the technical problems, the invention adopts the following technical scheme:
a finished oil drag reducer evaluation device comprises a closed-loop test pipeline, an oil product filling device to be tested, a drag reducer filling device, a non-shear pump, a centrifugal pump, a tracer filling device, a tracer interface detector, a flowmeter and a plurality of pressure sensors;
the oil filling device to be tested and the drag reducer filling device are directly connected with the test pipeline;
the centrifugal pump and the non-shearing pump are arranged on the test pipeline in parallel; valves are respectively arranged at the upstream and the downstream of the centrifugal pump, and valves are respectively arranged at the upstream and the downstream of the non-shearing pump;
the tracer filling device is arranged on a pipeline of the drag reducer filling device, and the tracer filling system comprises a tracer tank, an injection pump and a flowmeter;
the tracer interface detector is arranged on the test pipeline and is opposite to the inlet position of the drag reducer filling pipe on the test pipeline;
the pressure sensors are uniformly distributed on the test pipeline, wherein the pressure sensors are respectively arranged on the upstream pipeline and the downstream pipeline adjacent to the centrifugal pump/non-shearing pump.
The evaluation device further comprises a dirty oil recovery system, and the dirty oil recovery system is communicated with the test pipeline through a pipeline. The dirty oil recovery system comprises a gas-liquid separator and a dirty oil tank connected with the gas-liquid separator.
Further, the evaluation device also comprises a nitrogen purging device, and the nitrogen purging device is communicated with the test pipeline through a valve and a pipeline.
Further, the evaluation device may further include a filter provided downstream of the centrifugal pump.
Further, the evaluation device also comprises a sampling device, which is usually arranged on the pipe downstream of the centrifugal/shearless pump.
Further, the centrifugal pump and the non-shearing pump are arranged in parallel, so that the required flow is switched according to the experiment requirement in the test or evaluation process, and the requirement of simultaneous online is avoided.
Further, the online drag reducer filling device can be selected from conventional equipment in the field, such as a needle head type or a pumping type. A typical drag reducer fill system includes: drag reducing agent canisters, non-shear pumps, and flow meters. The present invention recommends a filling device having the following structure.
In the invention, a needle type online filling device is preferably adopted. The needle type drag reducer injection system comprises an injection pipe body, a main valve body, an auxiliary valve body, a medicament cavity, a propelling module, a power system, a control system and a display and operation system. The injection pipe body is welded with the pipeline. The injection tube body is connected with the medicament cavity through a flange. The main valve body is a stop valve, and the auxiliary valve body is a check valve. The two sides of the medicament cavity are respectively provided with a volume scale and a length scale which are in one-to-one correspondence. The medicine cavity can be selected and matched with various measuring range medicine cavities to meet different medicine quantity requirements, the sealing ring of the propulsion module is tightly combined with the inner wall of the medicine cavity, and complete sealing under the operation pressure of a pipeline can be realized. The pushing module can be separated from the medicament cavity to realize the dosing of the medicament cavity; the power system is a linear servo motor; the control system realizes the operations of starting/stopping, advancing, retreating and the like of the pushing module; the display and operating system is used for setting control parameters.
When the needle type drag reducer on-line filling device is filled with the agent, a certain amount of tracer is injected into the front end of the agent cavity, and the injection amount of the tracer is based on the lowest limit which can be detected by a tracer interface detector in a matched tracer detection system. The tracer may be a fluorescent agent.
The tracer filling system comprises a tracer, a storage tank, a filling pump and a flowmeter. Is connected with the side of the drag reducer filling device close to the test pipeline.
The tracer detection system may be of conventional construction in the art. The tracer detection system of the invention comprises: tracer detectors and electrical counters. The tracer test system is positioned in close proximity to the drag reducer fill system.
The invention also provides an evaluation method of the oil product drag reducer. The method comprises the following steps:
s1, filling pure oil (product oil or simulation oil) into an oil storage tank, switching the process to a non-shear pump, starting the non-shear pump, filling the oil into a pipeline, and recording the pressure difference P1 before and after the non-shear pump is stabilized and the pipe flow rate Q1;
s2 injecting a drag reducer into the test loop;
a needle type drag reducer online filling system can be adopted, tracer and drag reducer are injected into the medicament cavity in sequence, the injection speed is set, and the medicament in the medicament cavity is uniformly injected into the test pipeline by utilizing a pushing system;
if the pumping type drag reducer on-line filling system is adopted, firstly, a tracer injection system is started, a quantitative tracer is injected into a connecting pipe of the drag reducer injection system, then the drag reducer injection flow is set according to the required concentration of the drag reducer, and the drag reducer is uniformly injected into a test pipeline by using a non-shear pump;
s3, opening the tracer interface detector while opening the online drag reducer filling system;
s4, keeping the pipe flow constant, and immediately closing the drag reducer injection system when the tracer interface detector detects the tracer;
s5, recording the pressure difference P2 before and after the pressure sensor along the line is stable;
s6, adjusting a pump or a valve, keeping the pressure difference before and after the non-shearing pump unchanged, and recording the pipe flow Q2 after the reading of the flow meter is stable;
calculating the drag reduction rate and the output increase rate by an S7 formula, and completing the evaluation experiment of the drag reduction effect and the output increase effect;
s8, keeping the flow unchanged, recording the pressure difference before and after the non-shearing pump when the counter corresponding to the tracer detection interface updates data each time, and utilizing the data to research the influence rule of on-way shearing on the drag reducer;
and S9, switching to the centrifugal pump, closing the non-shearing pump, recording the pressure difference between the front and the back of the centrifugal pump when the counter corresponding to the tracer detection interface updates data each time, and carrying out research on the influence rule of pump shearing on the drag reducer by utilizing the data.
Further, the method can also comprise S10, when the pressure difference before and after the centrifugal pump tends to be stable, the sampling port takes an oil sample, and whether the index of the oil sample is qualified is tested.
Further, the method may further include S11, closing the centrifugal pump, switching the dirty oil pump flow, and starting the purge device.
Further, the method may further include step S12, finishing the device and the data, and ending the evaluation.
Compared with the prior art, the drag reducer evaluation device and method have the beneficial effects that:
1. by arranging the centrifugal pump and the non-shearing pump in parallel, the purposes of evaluating the drag reduction and delivery increase effects of the drag reducer, evaluating the effect of on-way shearing on the drag reducer and evaluating the effect of over-pumping shearing on the drag reducer can be achieved.
2. Through set up tracer injection device on drag reducer filling device, can pour into a strand of tracer into when pouring into the drag reducer into, utilize tracer detection device, can in time know the stroke of oil in the test tube way to judge the opportunity of stopping the injection of drag reducer.
3. By using the tracer interface detector, the running turns of the oil product (including the drag reducer) in the test pipeline can be measured, so that the running distance of the drag reducer of the oil product in the test pipeline is measured, and the attenuation performance of the drag reducer is evaluated.
4. The needle type online filling device which is preferably adopted can meet the requirements of different medicament (drag reducer) amounts by selecting and matching medicament cavities with various measuring ranges. The sealing ring of the propulsion module is tightly combined with the inner wall of the medicament cavity, so that complete sealing under the operating pressure of the pipeline can be realized. The linear servo motor is used as a power system, so that the addition amount and the addition rate of the drag reducer can be accurately controlled, the drag reducer is uniformly dispersed in oil products, and the evaluation accuracy is improved.
Drawings
Fig. 1 is a schematic flow chart of a drag reducer evaluation apparatus according to the present invention.
The system comprises a 1-closed-circuit test pipeline, a 2-to-be-tested oil product filling device, a 3-drag reducer filling device, a 4-shear-free pump, a 5-centrifugal pump, a 6-tracer filling device, a 7-tracer detector, an 8-flow meter, a 9-pressure sensor, a 10-drag reducer tank, an 11-drag reducer shear-free pump, a 12-flow meter, a 13-tracer tank, a 14-injection pump, a 15-flow meter, a 16-dirty oil tank, a 17-gas-liquid separator, an 18-nitrogen purging system, a 19-filter, a 20-sampling device, a 21-tracer detector, a 22-electric counter and a 23-drag reducer filling pipeline.
Fig. 2 is a schematic structural view of a needle type drag reducer filling apparatus.
Wherein, 41-injection tube body, 42-main valve body, 43-auxiliary valve body, 44-medicament cavity, 45-propulsion module, 46-power system, 47-control system, 48-display and operation system.
Detailed Description
For a better understanding of the present invention, the contents of the present invention will be further described below with reference to the accompanying drawings and examples, but the present invention is not limited to the following examples.
A finished oil drag reducer evaluation device comprises a closed-loop test pipeline 1, an oil product filling device 2 to be tested, a drag reducer filling device 3, a non-shear pump 4, a centrifugal pump 5, a tracer filling device 6, a tracer interface detector 7, a flowmeter 8 and a plurality of pressure sensors 9.
The oil filling device 2 to be tested and the drag reducer filling device 3 are directly connected with the test pipeline; the centrifugal pump 5 and the non-shearing pump 4 are arranged on the test pipeline 1 in parallel; valves are provided upstream and downstream of the centrifugal pump 5, respectively, and valves are provided upstream and downstream of the shearless pump 4, respectively.
The drag reducer filling apparatus 3 may be of a construction conventional in the art. A typical drag reducer filling apparatus includes a drag reducer tank 10, a shear-less pump 11, and a flow meter 12, the drag reducer tank 10 being in serial communication with the shear-less pump 11 and the flow meter 12. The tracer filling device 6 is communicated with a filling pipeline 23 of the drag reducer filling device, the tracer filling device 6 comprises a tracer tank 13, an injection pump 14 and a flow meter 15, and the tracer tank 13 is sequentially communicated with the injection pump 14 and the flow meter 15. The tracer interface detector 7 is arranged on the test pipeline and corresponds to the inlet position of the drag reducer filling pipe on the test pipeline; the tracer interface detector 7 includes a tracer detector 21 and an electrodynamic counter 22. The pressure sensors 9 are uniformly distributed on the closed-loop test pipeline 1, wherein the pressure sensors are respectively arranged on the upstream pipeline and the downstream pipeline close to the centrifugal pump 5/the non-shearing pump 4.
The evaluation device further comprises a dirty oil recovery system, and the dirty oil recovery system is communicated with the test pipeline through a pipeline. The dirty oil recovery system comprises a gas-liquid separator 17 and a dirty oil tank 16 connected thereto. Further, the evaluation device further comprises a nitrogen purging device 18, and the nitrogen purging device is communicated with the test pipeline 1 through a valve and a pipeline.
Further, the evaluation device may further include a filter 19 disposed downstream of the centrifugal pump. Further, the evaluation device also comprises a sampling device 20, which is typically arranged on the piping downstream of the centrifugal/shearless pump.
Further, the centrifugal pump and the shear-free pump are arranged in parallel, so that required equipment and processes are switched according to experimental requirements in the test or evaluation process, and the required equipment and the required processes are not required to be on line at the same time.
Further, the drag reducer on-line filling device can be selected from conventional equipment in the field, such as a needle type or a pumping type, and in this embodiment, a needle type on-line filling device is adopted.
The invention preferably employs a needle-type online filling system. The needle type drag reducer filling device comprises an injection pipe body 41, wherein the injection pipe body 41 is respectively communicated with a closed loop testing pipeline and a medicine cavity 44, a main valve body 42 and an auxiliary valve body 43 are arranged on the pipe body 41, the medicine cavity 44 is of a cylinder structure with one end closed, one end of the medicine cavity is connected with the closed loop testing pipeline, and the other end of the medicine cavity is provided with a propelling module 45. The propulsion module is in turn connected to a power system 46, a control system 47, and a display and operating system 48. The injection pipe body is connected with the pipeline by welding or flanges. The injection tube body is connected with the medicament cavity through a flange. The main valve body is a stop valve, and the auxiliary valve body is a check valve. The two sides of the medicament cavity are respectively provided with a volume scale and a length scale which are in one-to-one correspondence. The medicine cavity can be selected and matched with a plurality of measuring range medicine cavities to meet different medicine quantity requirements. The sealing ring of the propulsion module is tightly combined with the inner wall of the medicament cavity, so that complete sealing under the operating pressure of the pipeline can be realized. The pushing module can be separated from the medicament cavity to realize the dosing of the medicament cavity; the power system is a linear servo motor; the control system realizes the operations of starting/stopping, advancing, retreating and the like of the pushing module; the display and operating system is used for setting control parameters.
When the needle type drag reducer is filled into the system on line, a certain amount of tracer is injected into the front end of the medicament cavity, and the injection amount of the tracer is based on the lowest limit which can be detected by a tracer interface detector in a matched tracer detection system. The tracer may be a fluorescent agent.
The tracer filling system comprises a tracer, a storage tank, a filling pump and a flowmeter. The tracer fill system includes a side connection to the drag reducing agent fill system proximate the test line.
The tracer interface detector may be of conventional construction in the art. The tracer interface detection system of the invention comprises: tracer detectors and electrical counters. The tracer interface detection system is positioned proximate the drag reducer fill system at a location on the test line.
Claims (15)
1. A finished oil drag reducer evaluation device comprises a closed-loop test pipeline, an oil product filling device to be tested, a drag reducer filling device, a non-shear pump, a centrifugal pump, a tracer filling device, a tracer interface detector, a flowmeter and a plurality of pressure sensors;
the oil filling device to be tested and the drag reducer filling device are directly connected with the test pipeline;
the centrifugal pump and the non-shearing pump are arranged on the test pipeline in parallel; valves are respectively arranged at the upstream and the downstream of the centrifugal pump, and valves are respectively arranged at the upstream and the downstream of the non-shearing pump;
the tracer filling device is arranged on a pipeline of the drag reducer filling device, and the tracer filling system comprises a tracer tank, an injection pump and a flowmeter;
the tracer interface detector is arranged on the test pipeline and is opposite to the inlet position of the drag reducer filling pipe on the test pipeline;
the pressure sensors are uniformly distributed on the test pipeline, wherein the pressure sensors are respectively arranged on the upstream pipeline and the downstream pipeline adjacent to the centrifugal pump/non-shearing pump.
2. The apparatus of claim 1, further comprising a dirty oil recovery system in communication with the test conduit via a pipeline, the dirty oil recovery system comprising a gas-liquid separator and a dirty oil tank connected thereto.
3. The device according to claim 1 or 2, wherein the evaluation device further comprises a nitrogen purging device, and the nitrogen purging device is communicated with the test pipeline through a valve and a pipeline.
4. The apparatus of claim 1, wherein the evaluation device further comprises a filter disposed downstream of the centrifugal pump.
5. The apparatus of claim 1, wherein the evaluation apparatus further comprises a sampling device disposed on the tubing downstream of the centrifugal/shearless pump.
6. The apparatus of claim 1, wherein the centrifugal pump and the shearless pump are arranged in parallel to switch the required flow according to experimental requirements during a finger test or evaluation process without being on-line at the same time.
7. The apparatus of claim 1, wherein said drag reducing agent filling apparatus comprises a drag reducing agent tank, a shear-free pump, and a flow meter.
8. The apparatus of claim 1, wherein said drag reducer filling apparatus is selected from the group consisting of a needle-type in-line filling apparatus; the needle head type drag reducer injection system comprises an injection pipe body, a main valve body, an auxiliary valve body, a medicament cavity, a propelling module, a power system, a control system and a display and operation system; the injection pipe body is communicated with the pipeline; the injection pipe body is connected with the medicament cavity through a flange; the main valve body is a stop valve, and the auxiliary valve body is a check valve; the two sides of the medicament cavity are respectively provided with a volume scale and a length scale which are in one-to-one correspondence.
9. The device as claimed in claim 8, wherein the power system is a linear servo motor, the control system is used for realizing the start/stop, forward and backward operations of the pushing module, and the display and operation system is used for setting control parameters.
10. The apparatus of claim 1 wherein the tracer filling system comprises a tracer and reservoir, a fill pump, and a flow meter, the tracer filling system being connected to the drag reducing agent filling apparatus on a side thereof proximate the test line.
11. The apparatus of claim 1 wherein said tracer detection system comprises a tracer detector and an electrical counter.
12. A method for evaluating an oil drag reducer, using the evaluation apparatus according to any one of claims 1 to 11, comprising the steps of:
s1, filling pure oil into an oil storage tank, switching the process to a non-shear pump, starting the non-shear pump, filling the oil into a pipeline, and after the oil is stabilized, recording the pressure difference P1 before and after the non-shear pump and the pipe flow rate Q1;
s2 injecting a drag reducer into the test loop;
s3, opening the tracer interface detector while opening the online drag reducer filling system;
s4, keeping the pipe flow constant, and immediately closing the drag reducer injection system when the tracer interface detector detects the tracer;
s5, recording the pressure difference P2 before and after the pressure sensor along the line is stable;
s6, adjusting a pump or a valve, keeping the pressure difference before and after the non-shearing pump unchanged, and recording the pipe flow Q2 after the reading of the flow meter is stable;
calculating the drag reduction rate and the output increase rate by an S7 formula, and completing the evaluation experiment of the drag reduction effect and the output increase effect;
s8, keeping the flow unchanged, recording the pressure difference before and after the non-shearing pump when the tracer detection interface corresponds to the counter to update data each time, and utilizing the data to research the influence rule of on-way shearing on the drag reducer;
and S9, switching to the centrifugal pump, closing the non-shearing pump, recording the pressure difference between the front and the back of the centrifugal pump when the counter corresponding to the tracer detection interface updates data each time, and utilizing the data to research the influence rule of pump shearing on the drag reducer.
13. The evaluation method according to claim 12, further comprising a step S10, wherein when the pressure difference between the front and the rear of the pump tends to be stable, the sampling port takes an oil sample to test whether the index of the oil sample is qualified.
14. The evaluation method according to claim 13, further comprising step S11, wherein the centrifugal pump is turned off, the flow is switched to the sump oil pump flow, and the purge device is started.
15. The method according to claim 14, further comprising step S12, wherein the device and data are sorted, and the evaluation is finished.
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| CN201911418229.6A CN113125307A (en) | 2019-12-31 | 2019-12-31 | Method and device for evaluating drag reducer of finished oil |
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2019
- 2019-12-31 CN CN201911418229.6A patent/CN113125307A/en active Pending
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