CN106770380A - A kind of online crude oil water containing detector and its detection method - Google Patents
A kind of online crude oil water containing detector and its detection method Download PDFInfo
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- CN106770380A CN106770380A CN201611041841.2A CN201611041841A CN106770380A CN 106770380 A CN106770380 A CN 106770380A CN 201611041841 A CN201611041841 A CN 201611041841A CN 106770380 A CN106770380 A CN 106770380A
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- 239000010779 crude oil Substances 0.000 title claims abstract description 38
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 34
- 238000001514 detection method Methods 0.000 title abstract description 13
- 238000012360 testing method Methods 0.000 claims abstract description 60
- 238000005259 measurement Methods 0.000 claims abstract description 56
- 239000000523 sample Substances 0.000 claims abstract description 56
- 239000003921 oil Substances 0.000 claims abstract description 24
- 238000004891 communication Methods 0.000 claims abstract description 17
- 238000003780 insertion Methods 0.000 claims abstract description 10
- 230000037431 insertion Effects 0.000 claims abstract description 10
- 235000019198 oils Nutrition 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 10
- 230000001681 protective effect Effects 0.000 claims description 9
- 235000019476 oil-water mixture Nutrition 0.000 claims description 8
- 239000006260 foam Substances 0.000 claims description 7
- 101000838411 Homo sapiens Tubulin epsilon chain Proteins 0.000 claims description 6
- 102100028984 Tubulin epsilon chain Human genes 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 5
- 238000000576 coating method Methods 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 5
- 239000004065 semiconductor Substances 0.000 claims description 5
- 238000012546 transfer Methods 0.000 claims description 5
- 238000005260 corrosion Methods 0.000 claims description 4
- 230000007797 corrosion Effects 0.000 claims description 4
- 238000000926 separation method Methods 0.000 claims description 4
- 239000000356 contaminant Substances 0.000 claims description 3
- 230000002401 inhibitory effect Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims 1
- 229910052802 copper Inorganic materials 0.000 claims 1
- 239000010949 copper Substances 0.000 claims 1
- 239000003129 oil well Substances 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000012530 fluid Substances 0.000 description 3
- 229910001369 Brass Inorganic materials 0.000 description 2
- 239000010951 brass Substances 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005562 fading Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000000192 social effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000010512 thermal transition Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2223/00—Investigating materials by wave or particle radiation
- G01N2223/03—Investigating materials by wave or particle radiation by transmission
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2223/00—Investigating materials by wave or particle radiation
- G01N2223/10—Different kinds of radiation or particles
- G01N2223/101—Different kinds of radiation or particles electromagnetic radiation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2223/00—Investigating materials by wave or particle radiation
- G01N2223/60—Specific applications or type of materials
- G01N2223/613—Specific applications or type of materials moisture
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2223/00—Investigating materials by wave or particle radiation
- G01N2223/60—Specific applications or type of materials
- G01N2223/637—Specific applications or type of materials liquid
Landscapes
- 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)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The present invention relates to a kind of online crude oil water containing detector and its detection method, detector is arranged on oil pipeline, and online crude oil water containing detector includes test pipeline, detector main frame and two test probe apparatus with detector main frame grafting；Test pipeline is connected with oil pipeline, and a probe insertion through hole is respectively provided with the leading portion and back segment of test pipeline；Detector main frame includes that measuring nose, collection include measurement cable with control system, communication system, display system and operation key testing probe unit, the end of measurement cable is inserted in measuring nose, the front end setting measurement probe of cable is measured, two measurement probes can be inserted in the insertion test pipeline that through holes are sealed by two probes respectively；Described measuring nose includes oscillating circuit, radiating circuit, receiving circuit and tesing and switching circuit.Simple structure of the present invention, high degree of automation, accuracy of detection are high, can realize that continuous, efficient, practical moisture content is carried out to oil well output crude oil to be detected.
Description
Technical field
Oil transportation technical field is adopted the invention belongs to oil field, and in particular to a kind of online crude oil water containing detector and its detection side
Method.
Background technology
Exploitation of the oil well liquid-producing moisture content to oil field has important directive significance, directly affect the production of crude oil, metering,
Collection it is defeated, purification, etc. each link management, therefore, during crude oil production and accumulating, will crude oil water content examined
Survey, meanwhile, crude oil water content on-line checking data accurately and timely can reflect the working condition of producing well, to administrative department
Energy consumption is reduced, reduces cost is realized that oil field automation is managed, played an important role.
At present, oil field is directed to the analysis of oil well liquid-producing oil moisture content and detects in addition to manual assay method, on-line checking side
Method mainly has densimeter method, gamma-rays method, capacitance method, shortwave method, radio frequency method etc., the crude oil water content test of these multi-forms
Instrument, although achieve certain effect, but due to the composition complex of oil well liquid-producing, mechanical admixture, colloid, wax deposition, knot
The different degrees of presence of factor such as dirt and corrosion, causes its stability, accuracy, reliability and cost situation, it is impossible in satisfaction
State's oil field production requirement.Therefore, the characteristics of being produced for crude oil in China, studies the technology and method of the detection of crude oil water content,
Exploitation is applied to crude oil in China moisture content detection technique, with important social effect and economic worth.
The content of the invention
It is an object of the invention to provide a kind of online crude oil water containing detector and its detection method, can in real time to pipeline station
The crude oil water content of point, oil recovery well group and oil country tubular good oil transportation carries out accurate measurement, and measurement of water ratio scope is 0-100%.
The technical scheme is that：
A kind of online crude oil water containing detector, is arranged on oil pipeline, and described online crude oil water containing detector includes test
Pipeline, detector main frame and two test probe apparatus with detector main frame grafting；Described test pipeline and oil pipeline
Connection, is respectively provided with a probe insertion through hole on the leading portion and back segment of test pipeline；Described detector main frame includes surveying
Amount front end, collection and control system, communication system, display system and operation button, collection are bi-directionally connected measurement with control system
Front end, communication system, display system and operation button；Described test probe apparatus include measurement cable, the end of measurement cable
End is inserted in measuring nose, and the front end for measuring cable sets measurement probe, and two measurement probes can be inserted by two probes respectively
Enter in the insertion test pipeline of through hole sealing；Described measuring nose includes oscillating circuit, radiating circuit, receiving circuit and detection
Change-over circuit.
Described test probe apparatus also include measurement locknut external member and insulating sheath, and measurement locknut external member removably connects
The front end of measurement cable is connected on, measurement locknut external member intermediate sleeve sets described insulating sheath, and insulating sheath centre is wrapped up described
Measurement probe, measurement probe and measurement cable conducting.
Heater arriving groove, heater arriving groove are provided with test pipeline between two probe insertion through holes
Interior setting pipeline heater, described pipeline heater includes setting adiabatic foam, adiabatic foam in protective jacket, protective jacket
Interior to set semiconductor heating module and temperature relay, pipeline heater is connected with described collection with control system.
Dismountable anti-blocking jack panel is provided with the arrival end of described test pipeline, sets multiple on anti-blocking jack panel
Filtering through hole, anti-blocking jack panel carries out gas-liquid separation and contaminant filter to the crude oil to be measured for entering test pipeline.
Described test pipeline bottom is connected with anti-blocking by-pass line, and anti-blocking by-pass line is arranged on anti-blocking jack panel inner side
Test pipeline on；Anti-blocking by-pass line include two sections respectively with the VERTICAL TUBE of test pipeline communication and be connected two sections of VERTICAL TUBEs
Horizontal leak-off pipe, one end closing of horizontal leak-off pipe, one end set eduction valve, and constant pressure valve is provided with two sections of vertical pipeline sections.
The constant pressure valve is opened when pipe pressure is more than 2MPa, anti-blocking by-pass line excessively stream.
Described measurement probe is the gold-plated material probe of brass, and measurement detecting probe surface cladding corrosion-inhibiting coating measures probe
Measurement termination is the ball head structure with flowing hole.
Described communication system is RS-485 wired communication systems.
Based on the detection method of the online crude oil water containing detector, constant frequency that measurement probe produces oscillating circuit,
The raw electrical signal of permanent width is sent in test pipeline by radiating circuit, and another measurement probe is received by oil water mixture
The signal of the decay after propagation is simultaneously sent to receiving circuit, receiving circuit will get decay electric signal and without decay original
Beginning electric signal is compared, and draws pad value of the raw electrical signal by decay after oil water mixture；Tesing and switching circuit will decline
Depreciation is converted into the electric signal for being more easy to measurement, and the electric signal then is sent into collection and control system, collection and control system
Calculating crude oil water content shows the moisture content information transfer that will measure on the display system or by communication system to corresponding
Master system on.
Beneficial effects of the present invention：
Simple structure of the present invention, high degree of automation, accuracy of detection are high, can realize carrying out continuous, height to oil well output crude oil
Effect, practical moisture content detection.
Brief description of the drawings
Fig. 1 is overall structure schematic block diagram of the invention；
Fig. 2 is overall structure diagram of the invention；
Fig. 3 is the structural representation of test probe apparatus of the present invention；
Fig. 4 is the scheme of installation of present invention test pipeline, anti-blocking jack panel, anti-blocking by-pass line and heater；
In figure, 1- test pipelines, 2- detector main frames, 3- test probe apparatus, 4- probes insertion through hole, 5- measurement cables, 6-
Measurement probe, 7- measurement locknut external members, 8- insulating sheaths, 9- pipeline heaters, 10- protective jackets, the anti-blocking jack panels of 11-, 12-
Anti-blocking by-pass line, 13- VERTICAL TUBEs, the horizontal leak-off pipes of 14-, 15- eduction valves, 16- constant pressure valves.
Specific embodiment
The present invention is further detailed below in conjunction with the accompanying drawings, is contained referring to a kind of online crude oil shown in Fig. 1-Fig. 4
Water detector, is arranged on oil pipeline, and described online crude oil water containing detector includes test pipeline 1, the and of detector main frame 2
With the test probe apparatus 3 of detector main frame grafting；Described test pipeline 1 is connected with oil pipeline, and test pipeline 1 is provided with
Probe inserts through hole 4, and the differences such as 11mm, 20mm, 35mm are designed by the influence to air content and slippage velocity in test pipeline 1
The test pipeline 1 in aperture；Described detector main frame 2 includes measuring nose, collection and control system, communication system, display system
System and operation button, communication system is RS-485 wired communication systems, is responsible for the moisture content information transfer that will be measured to accordingly
On master system.Collection is bi-directionally connected measuring nose, communication system, display system and operation button with control system；It is described
Test probe apparatus 3 include that measurement cable 5, the end of measurement cable 5 are inserted in measuring nose, the front end for measuring cable 5 sets
Measurement probe 6 is put, described measurement probe 6 can be inserted in the insertion test pipeline 1 that through hole 4 is sealed by probe；Described survey
Amount front end includes oscillating circuit, radiating circuit, receiving circuit and tesing and switching circuit.
Described test probe apparatus 3 also include measurement locknut external member 7 and insulating sheath 8, and measurement locknut external member 7 is detachable
The front end for being connected to measurement cable 5, be arranged described insulating sheath 8, the tundish of insulating sheath 8 in the middle of measurement locknut external member 7
Described measurement probe 6 is wrapped up in, measurement probe 6 is turned on measurement cable 5.
Described test pipeline 1 sets and is provided with heater arriving groove, and the interior pipeline that sets of heater arriving groove adds
Hot device 9, described pipeline heater 9 includes setting adiabatic foam in protective jacket 10, protective jacket 10, is set in adiabatic foam
Semiconductor heating module and temperature relay, pipeline heater 9 are connected with described collection with control system；Semiconductor heated mould
Block can not only heat the temperature that test pipeline 1 reaches needs, it is to avoid test pipeline 1 is blocked because of wax deposition, moreover it is possible to made up traditional
The shortcomings of heater strip heating voltage is high, electric current is big, and it only needs completion heating by low-voltage direct 24V, 1A.Protective jacket
10 cause that testing tube thermal transition efficiency reaches more than 90% with adiabatic foam, while protective relay and semiconductor heating module.
Dismountable anti-blocking jack panel 11 is provided with the arrival end of described test pipeline 1, is set on anti-blocking jack panel
Multiple filtering through hole, the crude oil to be measured that anti-blocking jack panel 11 pairs enters test pipeline carries out gas-liquid separation and contaminant filter, with pressure
Gas in the mixture of oil, water and gas of power is because of eddy flow principle initial gross separation；Maximum filtering through hole is 8mm in multiple filtering through hole, is had
What is imitated avoids the blocking of felt or rubber to test pipeline 1 in oil pipeline, and anti-blocking jack panel 11 is located at oil water mixture
Into the entrance of test pipeline 1, it is easy to cleaning and replacing in production process；
The described bottom of test pipeline 1 is connected with anti-blocking by-pass line 12, and anti-blocking by-pass line 12 is arranged on anti-blocking jack panel 11
On the test pipeline 1 of inner side；Anti-blocking by-pass line 12 includes two sections of VERTICAL TUBEs 13 for being connected with test pipeline 1 respectively and is connected two
The horizontal leak-off pipe 14 of section VERTICAL TUBE 13, one end closing of horizontal leak-off pipe 14, one end set eduction valve 15, two sections of VERTICAL TUBEs 13
Constant pressure valve 16 is provided with section；When pressure imbalance in oil pipeline, constant pressure valve 16 is opened when pipe pressure is more than 2MPa, is prevented
The stifled excessively stream of by-pass line 12, ensures normal production.
Described measurement probe 6 is the gold-plated material probe of brass, measures the Surface coating corrosion-inhibiting coating of probe 6, measures probe 6
Measurement termination be the ball head structure with flowing hole, meet 5MPa, 400M3Long-time under/day pressure is washed away.
Operation principle of the invention is：
The present invention is based on high-frequency electromagnetic sonic wave guide propagation principle, and the electromagnetic wave of transmitting passes through after oil mixing with water medium, its amplitude with
Phase can all produce certain change, draw profit content ratio by measuring the attenuation degree of its electric signal, its physical theory
Basis is all based on the Maxwell equation of classics.When the fluid in using electromagnetic wave signal measurement petroleum pipeline, steel is defeated
Oil pipeline is good conductor and constitutes waveguide, so as to fetter the propagation with guide electromagnetic waves.Oil water mixture is lossy matchmaker
Matter, so as to cause the amplitude fading of electromagnetic wave and phase offset.Therefore, the guide properties in pipeline are common by pipeline and fluid
Determine.Guide measuring method is the electromagnetic wave that certain pattern and certain frequency are encouraged using transmitting antenna, then using reception
Antenna detection goes out the decay and phase shift of guided wave, so as to obtain the electrical parameter of fluid in investigative range, and then using water and oil
Electrical parameter difference draws moisture content.
Constant frequency that one measurement probe 6 produces oscillating circuit, the raw electrical signal of permanent width are sent to by radiating circuit
In test pipeline, another measurement probe 6 receives the signal by the decay after oil water mixture propagation and is sent to reception electricity
Road, the decay electric signal that receiving circuit will get is compared with the raw electrical signal without decay, draws raw electrical signal
By the pad value decayed after oil water mixture；Pad value is converted into tesing and switching circuit the electric signal for being more easy to measurement, then
The electric signal is sent to collection and control system, data acquisition and control part is the core of data operation and data transfer,
It is responsible for calculating real-time water cut value by linear correction and weighted average value-based algorithm, and acquisition rate reaches 200Ms once, its
Certainty of measurement can reach within 5%, repeatable accuracy 1%；Collection calculates crude oil water content and is displayed in display system with control system
The upper or moisture content information transfer that will be measured by RS-485 wired communication systems is on corresponding master system.
Present disclosure is not limited to cited by embodiment, and those of ordinary skill in the art are by reading description of the invention
And any equivalent conversion taken technical solution of the present invention, it is claim of the invention and is covered.
Claims (9)
1. a kind of online crude oil water containing detector, is arranged on oil pipeline, it is characterised in that：Described online crude oil water containing
Detector includes test pipeline（1）, detector main frame（2）And two test probe apparatus with detector main frame grafting（3）；Institute
The test pipeline stated（1）Connected with oil pipeline, in test pipeline（1）Leading portion and back segment on be respectively provided with the insertion of probe
Through hole（4）；Described detector main frame（2）Including measuring nose, collection and control system, communication system, display system and behaviour
Make button, collection is bi-directionally connected measuring nose, communication system, display system and operation button with control system；Described test
Probe unit（3）Including measurement cable（5）, measurement cable（5）End be inserted in measuring nose, measure cable（5）Front end
Measurement probe is set（6）, two measurement probes（6）Through hole can be inserted by two probes respectively（4）The insertion testing tube of sealing
Road（1）It is interior；Described measuring nose includes oscillating circuit, radiating circuit, receiving circuit and tesing and switching circuit.
2. online crude oil water containing detector according to claim 1, it is characterised in that：Described test probe apparatus（3）
Also include measurement locknut external member（7）And insulating sheath（8）, measure locknut external member（7）It is removably attachable to measure cable（5）'s
Front end, measures locknut external member（7）Centre is arranged described insulating sheath（8）, insulating sheath（8）Parcel described measurement in centre is visited
Pin（6）, measure probe（6）With measurement cable（5）Conducting.
3. online crude oil water containing detector according to claim 1 and 2, it is characterised in that：In two probe insertion through holes
（4）Between test pipeline（1）On be provided with heater arriving groove, pipeline heater is set in heater arriving groove（9）,
Described pipeline heater（9）Including protective jacket（10）, protective jacket（10）It is interior that adiabatic foam is set, set in adiabatic foam
Semiconductor heating module and temperature relay, pipeline heater（9）It is connected with control system with described collection.
4. line crude oil water containing detector according to claim 3, it is characterised in that：Described test pipeline（1）Entrance
Dismountable anti-blocking jack panel is provided with end（11）, multiple filtering through holes, anti-blocking jack panel are set on anti-blocking jack panel（11）
Crude oil to be measured to entering test pipeline carries out gas-liquid separation and contaminant filter.
5. online crude oil water containing detector according to claim 4, it is characterised in that：Described test pipeline（1）Bottom
It is connected with anti-blocking by-pass line（12）, anti-blocking by-pass line（12）It is arranged on anti-blocking jack panel（11）The test pipeline of inner side（1）
On；Anti-blocking by-pass line（12）Including two sections respectively with test pipeline（1）The VERTICAL TUBE of connection（13）With two sections of VERTICAL TUBEs of connection
（13）Horizontal leak-off pipe（14）, horizontal leak-off pipe（14）One end closing, one end set eduction valve（15）, two sections of VERTICAL TUBEs
（13）Constant pressure valve 16 is provided with section.
6. online crude oil water containing detector according to claim 5, it is characterised in that：The constant pressure valve（16）It is big in pipe pressure
Opened when 2MPa, anti-blocking by-pass line（12）Excessively stream.
7. online crude oil water containing detector according to claim 8, it is characterised in that：Described measurement probe（6）It is Huang
The gold-plated material probe of copper, measures probe（6）Surface coating corrosion-inhibiting coating, measures probe（6）Measurement termination be with flowing hole
Ball head structure.
8. online crude oil water containing detector according to claim 7, it is characterised in that：Described communication system is RS-485
Wired communication system.
9. the measuring method of online crude oil water containing detector according to claim 1, it is characterised in that：One measurement probe
（6）The raw electrical signal of constant frequency, permanent width oscillating circuit generation is sent in test pipeline by radiating circuit, another survey
Amount probe（6）Receive the signal by the decay after oil water mixture propagation and be sent to receiving circuit, receiving circuit will be obtained
To decay electric signal with without decay raw electrical signal be compared, draw raw electrical signal by being declined after oil water mixture
The pad value for subtracting；Pad value is converted into tesing and switching circuit the electric signal for being more easy to measurement, is then sent to the electric signal and is adopted
Collection and control system, collection and control system are calculated crude oil water content and show on the display system or incited somebody to action by communication system
The moisture content information transfer for measuring is on corresponding master system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611041841.2A CN106770380A (en) | 2016-11-24 | 2016-11-24 | A kind of online crude oil water containing detector and its detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201611041841.2A CN106770380A (en) | 2016-11-24 | 2016-11-24 | A kind of online crude oil water containing detector and its detection method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109596669A (en) * | 2018-11-09 | 2019-04-09 | 大港油田集团有限责任公司 | Water-containing machine online test method |
| TWI792985B (en) * | 2022-04-19 | 2023-02-11 | 佳承精工股份有限公司 | Oil quality testing accessories |
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