CN108132202A - Detecting crude oil water content device - Google Patents
Detecting crude oil water content device Download PDFInfo
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- CN108132202A CN108132202A CN201810084891.1A CN201810084891A CN108132202A CN 108132202 A CN108132202 A CN 108132202A CN 201810084891 A CN201810084891 A CN 201810084891A CN 108132202 A CN108132202 A CN 108132202A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N7/00—Analysing materials by measuring the pressure or volume of a gas or vapour
- G01N7/14—Analysing materials by measuring the pressure or volume of a gas or vapour by allowing the material to emit a gas or vapour, e.g. water vapour, and measuring a pressure or volume difference
- G01N7/16—Analysing materials by measuring the pressure or volume of a gas or vapour by allowing the material to emit a gas or vapour, e.g. water vapour, and measuring a pressure or volume difference by heating the material
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Abstract
The invention discloses a kind of detecting crude oil water content device, including：Oily cylinder, the outer wall top of oily cylinder are provided with oil inlet pipe, and oil inlet pipe one end nozzle is connected with oily cylinder, and round-bottomed flask can be used in oily cylinder；Cooling device, cooling device includes the cooling tube, condenser pipe, connecting tube of vertical direction setting, cooling tube is the interior sealing container that cooling water is housed, condenser pipe one end seals and is embedded in cooling tube, the condenser pipe other end is provided with opening, connecting tube one end is connected across cooling tube with condenser pipe, and the connecting tube other end is connected with oily cylinder；Heating unit, heating unit are mounted on the bottom of oily cylinder.The purpose of the present invention is to provide a kind of measurement more accurate detecting crude oil water content devices of crude oil water content.
Description
Technical field
The invention belongs to crude oil detection device technical fields, and in particular to a kind of detecting crude oil water content device.
Background technology
The crude oil exploited in oil field all contains certain moisture, and water content refers to that the quality of former W/O accounts for grease in crude oil
The percentage of mixed liquor gross mass.Exploitation, processing refining, transaction measurement and the product sale in oil field are required for grasping containing for crude oil
Regimen condition accurately measures the water content of crude oil, to take dewatering means and corresponding exploitation, processing and sale scheme, really
Protect the normal operation of production.The method measured now is typically to measure a certain amount of sample, since the density of grease is different, water
Container bottom is usually stayed in, by the volume for reading water, it is possible to the water content of crude oil is calculated, due to usual water and crude oil
Certain mixing is had, the resultant error of measure is with regard to larger, and the measurement data of crude oil water content is with regard to inaccurate.
Invention content
Therefore the technical problem to be solved in the present invention be to overcome in the prior art crude oil water content measurement error it is larger
Defect.
For this purpose, the technical solution adopted is that, the present invention provides a kind of detecting crude oil water content device, including：
Oily cylinder, the outer wall top of the oil cylinder are provided with oil inlet pipe, and described oil inlet pipe one end nozzle is connected with the oily cylinder；
Cooling device, the cooling device include the cooling tube, condenser pipe, connecting tube of vertical direction setting, the cooling
It manages as the interior sealing container equipped with cooling water, described condenser pipe one end seals and is embedded in the cooling tube, the condenser pipe
The other end is provided with opening, and described connecting tube one end is connected across cooling tube with the condenser pipe, the connecting tube other end with
The oil cylinder connection；
Heating unit, heating unit are mounted on the bottom of oily cylinder.
In order to improve sealing effect, preferred technical solution is that lid is provided on the other end of the oil inlet pipe, described
Lid is threadedly coupled with oil inlet pipe.
For the ease of the collection of cooling water, calculated convenient for the result of water content, preferred technical solution is to further include reception
Device, the reception device include receiver, drain valve, scale are provided on the outer wall of the receiver, the opening is with connecing
The top connection of device is received, the bottom end of the receiver is provided with discharge outlet, and the receiver is provided at the discharge outlet
Drain valve.
In order to reduce error, the accuracy that crude oil water content measures is improved, preferred technical solution is that the receiver is adopted
With oil-resistant high-temperature elastic material, described return duct one end nozzle is connected with the top of the receiver, and the return duct is another
End pipe mouth is connected with the connecting tube, and one layer of hydrophobic oleophilic oil filter membrane is provided in the return duct.
In order to enable crude oil can be heated quickly, measurement efficiency is improved, preferred technical solution is that the heating unit includes
Platform, processor, controls panel at heater strip, and arc pit is provided on the platform, is uniformly arranged on the inner wall of the pit
There is the heater strip, the oil cylinder bottom is fixed in the pit, and cavity is provided in the platform, is set in the cavity
There is the processor, control panel is provided on the side wall of the platform, the control panel is electrically connected with the processor,
The processor is electrically connected with the heater strip.
In order to enable oily cylinder and condenser pipe are fixed more securely, increase the stability of device, preferred technical solution is institute
It states and U-shaped bar is provided on platform, the both ends of the U-shaped bar are separately fixed at the both sides of the platform upper surface, the cooling tube
It is fixed on the bar of the horizontal direction of the U-shaped bar.
In order to improve the cooling velocity of the steam of evaporation, preferred technical solution is set on the side of the cooling tube
There is water inlet pipe, described water inlet pipe one end nozzle is connected with the cooling tube, the water inlet pipe other end nozzle and input water pipe pipe
Mouth connects, and is provided with valve on the water inlet pipe, outlet pipe, described outlet pipe one end are provided on the opposite side of the cooling tube
Nozzle is connected with the cooling tube, and the outlet pipe other end nozzle is connected with output water pipe nozzle.
It cuts off the water supply in order to prevent, causes steam and oil gas in condenser pipe that can not cool down, lead to the generation of safety accident,
Preferred technical solution is to further include anti-means for protecting power device when water-break, and the anti-means for protecting power device when water-break includes flow sensor, alarm
Device, the water inlet pipe are provided with the flow sensor on the inner wall at the cooling tube, are set on the outer wall of the platform
Alarm is equipped with, the flow sensor is electrically connected with the processor, and the alarm is electrically connected with the processor.
In order to improve the precision of crude oil water content measurement, preferred technical solution is that the condenser pipe is provided with described open
One end of mouth is cone-shaped, and the condenser pipe is provided with rondelle oleophylic sponge, institute on inner wall above the opening
It states and is provided through being spaced equally distributed through-hole on oleophylic sponge, the oleophylic sponge is fixedly connected with the condenser pipe.
For the ease of the replacement of oleophylic sponge, preferred technical solution is to be provided with level side in the condensation pipe outer wall
To cylinder, the cylindrical member at one end with it is described condensation pipe outer wall be fixedly connected, be provided through level on the cylinder
The slot in direction, the opening size of the slot and the inner wall of the condenser pipe match, and the oleophylic sponge clamps across the slot
On the inner wall of the condenser pipe, sealing cover, the sealing cover and the cylinder spiral shell are provided on the cylinder other end
Line connects, and dragging item is provided on the oleophylic sponge, described dragging one end is fixedly connected with the oleophylic sponge, described to drag
An other end is dragged to extend in the slot.
The advantage of the invention is that：A kind of detecting crude oil water content device of the present invention, including oily cylinder, the outer wall top of oily cylinder
Portion is provided with oil inlet pipe, and oil inlet pipe one end nozzle is connected with oily cylinder, and round-bottomed flask can be used in oily cylinder；Cooling device, cooling device
Cooling tube, condenser pipe including vertical direction setting, connecting tube, cooling tube are equipped with the sealing container of cooling water, condenser pipe in
One end seals and is embedded in cooling tube, and the condenser pipe other end is provided with opening, and connecting tube one end passes through cooling tube and condenser pipe
Connection, the connecting tube other end are connected with oily cylinder；Heating unit, heating unit are mounted on the bottom of oily cylinder.The sample of acquisition is former
Oil is poured into from oil inlet pipe in oily cylinder, is then turned on heating unit and crude oil is heated, since the boiling point of water is lower than oil, when adding
Heat to certain temperature, water in crude oil will explosive evaporation, entered in condenser pipe from connecting tube, drop of the steam through supercooled water
Condense after temperature, flowed out from opening, under opening place graduated cylinder collect condensed water, then according to the volume of the condensed water of collection with
The ratio between volume of crude oil, it is possible to obtain the percentage of the water content in crude oil.Since the crude oil in sample is by heating so that
Moisture in crude oil all boils completely, and the volume of former W/O is obtained using condensation, improves the accuracy of measurement.
Description of the drawings
Fig. 1 is the structure diagram of the present invention.
Fig. 2 is the structure diagram of heating unit in the present invention.
Fig. 3 is the front view of oleophylic sponge removable parts in the present invention.
Fig. 4 is the side view of oleophylic sponge removable parts in the present invention
Wherein, 1- oil cylinder；2- oil inlet pipes；3- lids；4- cooling tubes；5- condenser pipes；6- is open；7- connecting tubes；8- platforms；
9- heater strips；10- processors；11- control panels；12- pits；13- cavitys；14-U type bars；15- water inlet pipes；16- valves；17-
Outlet pipe；18- flow sensors；19- alarms；20- oleophylic sponges；21- through-holes；22- cylinders；23- oleophylic sponges；24-
Sealing cover；25- pulls item；26- receivers；27- drain valves；28- return ducts；29- discharge outlet；30- hydrophobic oleophilic oil filter membranes.
Specific embodiment
Technical scheme of the present invention is clearly and completely described below in conjunction with attached drawing, it is clear that described implementation
Example is part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill
Personnel's all other embodiments obtained without making creative work, shall fall within the protection scope of the present invention.
As shown in Figure 1, a kind of detecting crude oil water content device of the present invention, including oily cylinder 1, the outer wall top of the oil cylinder 1
Portion is provided with oil inlet pipe 2, and 2 one end nozzle of oil inlet pipe is connected with the oily cylinder 1, and round-bottomed flask can be used in the oil cylinder 1；
Cooling device, the cooling device includes the cooling tube 4, condenser pipe 5, connecting tube 7 of vertical direction setting, described cold
But pipe 4 is the interior sealing container that cooling water is housed, and described 5 one end of condenser pipe seals and is embedded in the cooling tube 4, described cold
Solidifying 5 other end of pipe is provided with opening 6, and described 7 one end of connecting tube is connected across cooling tube 4 with the condenser pipe 5, the connecting tube
7 other ends are connected with the oily cylinder 1；Ground clamping can be used with the oily cylinder 1 in the connecting tube 7, easy to clean.
Heating unit, heating unit are mounted on the bottom of oily cylinder 1.
Operation principle：The sample crude oil of acquisition is poured into from oil inlet pipe 2 in oily cylinder 1,2 oil inlet of oil inlet pipe is used into cotton
Flower is blocked, and is then turned on heating unit and crude oil is heated, since the boiling point of water is lower than oil, when being heated to a constant temperature
Degree, water in crude oil will explosive evaporation, entered in condenser pipe 5 from connecting tube 7, steam is cold after the cooling of supercooled water
It is solidifying, it is flowed out from opening 6, places graduated cylinders 6 time in opening and collect condensed waters, then according to the volume of condensation+water of collection and original
The ratio between volume of oil, it is possible to obtain the percentage of the water content in crude oil.Since the crude oil in sample is by heating so that former
Moisture in oil all boils completely, and the volume of former W/O is obtained using condensation, improves the accuracy of measurement.
In order to improve sealing effect, preferred technical solution is that lid 3, institute are provided on the other end of the oil inlet pipe 2
Lid 3 is stated to be threadedly coupled with oil inlet pipe 2.After being packed into crude oil in oily cylinder 1, lid is sealed, to ensure in distillation process,
The leakproofness of oily cylinder.
For the ease of the collection of cooling water, calculated convenient for the result of water content, preferred technical solution is to further include reception
Device, the reception device includes receiver 26, drain valve 27, scale is provided on the outer wall of the receiver 26, described to open
Mouthfuls 6 connect with the top of the receiver 26, and described be open 6 can be connected through a screw thread with the receiver 26, it is easy to disassemble more
It changes, the bottom end of the receiver 26 is provided with discharge outlet 29, and the receiver 26 is provided with draining at the discharge outlet 29
Valve 27.The receiver 26 can collect condenser pipe 5 condensation water, due to also can there are a small amount of cold oil, oil can be in the upper of water
Layer, the volume being solely discharged by water graduation mark corresponding with the line of demarcation in oily section, so as to calculate the water content in crude oil.
In order to reduce error, the accuracy that crude oil water content measures is improved, preferred technical solution is the receiver 26
Using oil-resistant high-temperature elastic material, 28 one end nozzle of return duct is connected with the top of the receiver 26, and return duct 28 is another
End pipe mouth is connected with the connecting tube 7, and one layer of hydrophobic oleophilic oil filter membrane 30 is provided in the return duct 28.The receiver 26
It is made of elastoplastic, if the oil in receiver 26 on condensed water is more, receiver 26 can be squeezed with hand and caused
Internal liquid level raising, the oil on upper strata run past the filtering of hydrophobic oleophilic oil filter membrane 30 in return duct 28, and moisture cannot flow through,
Oil stream is returned in oily cylinder 1, is distilled again, and the moisture in reflux is extracted again, in this way, recycle back and forth, can reduce by
Moisture in crude oil improves the accuracy that crude oil water content measures.
In order to enable crude oil can be heated quickly, measurement efficiency is improved, preferred technical solution is that the heating unit includes
Platform 8, processor 10, controls panel 11 at heater strip 9, and arc pit 12, the inner wall of the pit 12 are provided on the platform
On be evenly arranged with the heater strip 9,1 bottom of the oil cylinder is fixed in the pit 12, and cavity is provided in the platform 8
13, the processor 10 is provided in the cavity 13, and control panel 11, the control are provided on the side wall of the platform 8
Panel 11 is electrically connected with the processor 10, and the processor 10 is electrically connected with the heater strip 9, is wrapped up outside heating wire
Alkali-free glass fibre makees insulating materials, with aluminium silicate wool through Vacuum shaping into hemispherical.It, can by being operated on control panel 11
To adjust the different rates of heat addition so that microprocessor 10 controls heater strip 9 to heat the crude oil in oily cylinder 1.
In order to enable oily cylinder and condenser pipe are fixed more securely, increase the stability of device, preferred technical solution is institute
It states and U-shaped bar 14 is provided on platform 8, the both ends of the U-shaped bar 14 are separately fixed at the both sides of 8 upper surface of platform, described
Cooling tube 4 is fixed on the bar of the horizontal direction of the U-shaped bar 14.
In order to improve the cooling velocity of the steam of evaporation, preferred technical solution is, as shown in Fig. 2, the cooling tube 4
Water inlet pipe 15 is provided on side, 15 one end nozzle of water inlet pipe is connected with the cooling tube 4,15 other end of water inlet pipe
Nozzle is connected with input water pipe nozzle, and valve 16 is provided on the water inlet pipe 15, is provided on the opposite side of the cooling tube 4
Outlet pipe 17,17 one end nozzle of outlet pipe are connected with the cooling tube 4,17 other end nozzle of outlet pipe and output water
Pipe nozzle connects.The top of the condenser pipe 5 can also extend the cooling 5 and be arranged to open state, when heating distillation,
It is gently clogged with cotton mass, in order to avoid the vapor in air enters condenser pipe, influenced containing the accurate of aquametry.It should not mistake during heating
Soon, it prevents in condenser pipe that steam pressure is excessive, steam is caused to be gone out from condenser pipe, cause fire incident and the oily standard containing aquametry
True property.Condenser water inlet pipe 15 is connected to water, and the opening and closing of tap water are controlled by valve 16, and the outlet pipe 17 can connect
Extraneous drainpipe so that the water in cooling tube 4 is constantly replaced, and to ensure that cooling water keeps relatively low temperature, is improved
The condensation rate of steam.It cuts off the water supply in order to prevent, causes steam and oil gas in condenser pipe that can not cool down, lead to safety accident
Generation, preferred technical solution is to further include anti-means for protecting power device when water-break, the anti-means for protecting power device when water-break include flow sensor
18th, alarm 19, the water inlet pipe 15 is provided with the flow sensor 18 on the inner wall at the cooling tube 4, described
Alarm 19 is provided on the outer wall of platform 8, the flow sensor 18 is electrically connected with the processor 10, the alarm
19 are electrically connected with the processor 10.If there is the situation that tap water stopping is supplied or pressure is too small, the steam in condenser pipe
It can not be cooled down with oil gas, solvent naphtha, water vapour will be gone out by condensing gas, and high-temperature oil gas drips to the electric heating on platform 8
It covers on (heating wire), will result in fire incident.Cooling water flow sensor 18 can detect the water flow into cooling tube 4,
Then processor 10 is transmitted flow information to, when cooling water stops supply or flow is less than preset critical value, processing
Device 10 will start alarm 19, and cut off heating power supply, send out alarm, so as to which personnel be reminded to take corresponding safety measure,
Avoid the generation of accident.
In order to improve the precision of crude oil water content measurement, preferred technical solution is, as shown in Figure 3-4, the condenser pipe 5
The one end for being provided with the opening 6 is cone-shaped, and the condenser pipe 5 is provided with circle the upper surface of at the opening 6 on inner wall
Template oleophylic sponge 20 is provided through being spaced equally distributed through-hole 21, the oleophylic sponge 20 on the oleophylic sponge 20
It is fixedly connected with the condenser pipe 5.The oleophylic sponge 20 is a kind of organosilicon macromolecule sponge material, and organosilan is main
A large amount of non-polar groups and higher roughness are contained in raw material, surface, make had efficient hydrophobic, oleophylic effect.The parent
Oily sponge 20 can adsorb the oil gas by cooling pipework condensation, and the water condensed will not then be adsorbed, the water of condensation from through-hole 21 to
It flows down, is collected using 6 outflow of opening, so as to obtain the water of high-purity so that the measurement of crude oil water content is more accurate.
For the ease of the replacement of oleophylic sponge, preferred technical solution is to be provided with level side on 5 outer wall of condenser pipe
To cylinder 22, described 22 one end of cylinder is fixedly connected with 5 outer wall of condenser pipe, through setting on the cylinder 22
There is the slot 23 of horizontal direction, the opening size of the slot 23 and the inner wall of the condenser pipe 5 match, and the oleophylic sponge 20 is worn
It crosses the slot 23 to be installed on the inner wall of the condenser pipe 5, sealing cover 24 is provided on 22 other end of cylinder, it is described close
Capping 24 is threadedly coupled with the cylinder 22.Oleophylic sponge 20 in use for some time, will adsorb many oil in full
And state, oleophylic sponge is needed replacing, sealing cover 24 is opened, is put in, oleophylic sponge 20 is taken out, then from slot 23 with tweezers
New oleophylic sponge is replaced with again, and screwing hermetic lid 24 just completes the replacement of oleophylic sponge, very convenient.For the ease of taking
Go out oleophylic sponge, preferred technical solution be provided on the oleophylic sponge 20 pull item 25, it is described dragging 25 one end of item with
The oleophylic sponge 20 is fixedly connected, and dragging 25 other end of item is extended in the slot 23.When needing replacing, open close
Capping 24, pinching dragging item 25 with hand just can very easily take out oleophylic sponge.
Claims (10)
1. a kind of detecting crude oil water content device, which is characterized in that including：
Oily cylinder (1) is provided with oil inlet pipe (2) at the top of the outer wall of the oil cylinder (1), oil inlet pipe (2) one end nozzle with it is described
Oily cylinder (1) connection；
Cooling device, the cooling device includes the cooling tube (4), condenser pipe (5), connecting tube (7) of vertical direction setting, described
Cooling tube (4) is the interior sealing container that cooling water is housed, and described condenser pipe (5) one end seals and is embedded in the cooling tube (4)
Interior, condenser pipe (5) other end is provided with opening (6), and described connecting tube (7) one end passes through cooling tube (4) and the condensation
(5) connection is managed, connecting tube (7) other end is connected with the oily cylinder (1)；
Heating unit, heating unit are mounted on the bottom of oily cylinder (1).
2. a kind of detecting crude oil water content device according to claim 1, which is characterized in that the oil inlet pipe (2) it is another
Lid (3) is provided on one end, the lid (3) is threadedly coupled with oil inlet pipe (2).
3. a kind of detecting crude oil water content device according to claim 1, which is characterized in that further include reception device, institute
It states reception device and includes receiver (26), drain valve (27), scale, the opening are provided on the outer wall of the receiver (26)
(6) top with the receiver (26) connects, and the bottom end of the receiver (26) is provided with discharge outlet (29), the receiver
(26) it is provided with drain valve (27) at the discharge outlet (29).
4. a kind of detecting crude oil water content device according to claim 3, which is characterized in that the receiver (26) uses
Oil-resistant high-temperature elastic material, return duct (28) one end nozzle are connected with the top of the receiver (26), and return duct (28) is another
One end nozzle is connected with the connecting tube (7), and one layer of hydrophobic oleophilic oil filter membrane (30) is provided in the return duct (28).
5. a kind of detecting crude oil water content device according to claim 1, which is characterized in that the heating unit includes flat
Platform (8), processor (10), controls panel (11) at heater strip (9), and arc pit (12), the pit are provided on the platform
(12) heater strip (9) is evenly arranged on inner wall, described oil cylinder (1) bottom is fixed in the pit (12), described
Cavity (13) is provided in platform (8), the processor (10), the side wall of the platform (8) are provided in the cavity (13)
On be provided with control panel (11), the control panel (11) is electrically connected with the processor (10), the processor (10)
It is electrically connected with the heater strip (9).
6. a kind of detecting crude oil water content device according to claim 5, which is characterized in that set on the platform (8)
There is U-shaped bar (14), the both ends of the U-shaped bar (14) are separately fixed at the both sides of the platform (8) upper surface, the cooling tube
(4) it is fixed on the bar of the horizontal direction of the U-shaped bar (14).
A kind of 7. detecting crude oil water content device according to claim 1, which is characterized in that the one of the cooling tube (4)
Water inlet pipe (15) is provided on side, water inlet pipe (15) one end nozzle is connected with the cooling tube (4), the water inlet pipe (15)
Other end nozzle is connected with input water pipe nozzle, is provided with valve (16) on the water inlet pipe (15), the cooling tube (4) it is another
Outlet pipe (17) is provided on side, outlet pipe (17) one end nozzle is connected with the cooling tube (4), the outlet pipe
(17) other end nozzle is connected with output water pipe nozzle.
8. a kind of detecting crude oil water content device according to claim 5, which is characterized in that further include anti-water cut-off protection dress
It puts, the anti-means for protecting power device when water-break includes flow sensor (18), alarm (19), and the water inlet pipe (15) is close to the cooling
The flow sensor (18) is provided on inner wall at pipe (4), alarm (19) is provided on the outer wall of the platform (8),
The flow sensor (18) is electrically connected with the processor (10), and the alarm (19) is electrical with the processor (10)
Connection.
A kind of 9. detecting crude oil water content device according to claim 1, which is characterized in that condenser pipe (5) setting
The one end for having the opening (6) is cone-shaped, and the condenser pipe (5) is provided with the upper surface of at the opening (6) on inner wall
Rondelle oleophylic sponge (20) is provided through being spaced equally distributed through-hole (21), the parent on the oleophylic sponge (20)
Oily sponge (20) is fixedly connected with the condenser pipe (5).
A kind of 10. detecting crude oil water content device according to claim 9, which is characterized in that condenser pipe (5) outer wall
On be provided with the cylinder (22) of horizontal direction, described cylinder (22) one end is fixedly connected with the condenser pipe (5) outer wall, institute
State the slot (23) that horizontal direction is provided through on cylinder (22), opening size and the condenser pipe (5) of the slot (23)
Inner wall match, the oleophylic sponge (20) is installed on across the slot (23) on the inner wall of the condenser pipe (5), the circle
Sealing cover (24) is provided on cylinder (22) other end, the sealing cover (24) is threadedly coupled with the cylinder (22), described
It being provided on oleophylic sponge (20) and pulls item (25), described dragging item (25) one end is fixedly connected with the oleophylic sponge (20),
Described dragging item (25) other end is extended in the slot (23).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810084891.1A CN108132202B (en) | 2018-01-29 | 2018-01-29 | Crude oil water content measuring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810084891.1A CN108132202B (en) | 2018-01-29 | 2018-01-29 | Crude oil water content measuring device |
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| CN108132202A true CN108132202A (en) | 2018-06-08 |
| CN108132202B CN108132202B (en) | 2020-08-14 |
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| CN206772974U (en) * | 2017-06-12 | 2017-12-19 | 东营同博石油电子仪器有限公司 | High-precision crude oil determination of moisture device |
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