CN112485156A - Controllable high accuracy crude oil moisture content measuring apparatu of flow - Google Patents
Controllable high accuracy crude oil moisture content measuring apparatu of flow Download PDFInfo
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- CN112485156A CN112485156A CN202011396661.2A CN202011396661A CN112485156A CN 112485156 A CN112485156 A CN 112485156A CN 202011396661 A CN202011396661 A CN 202011396661A CN 112485156 A CN112485156 A CN 112485156A
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- 239000010779 crude oil Substances 0.000 title claims abstract description 76
- 239000007788 liquid Substances 0.000 claims abstract description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 29
- 238000005192 partition Methods 0.000 claims abstract description 9
- 239000003921 oil Substances 0.000 claims description 11
- 239000011148 porous material Substances 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 abstract description 6
- 230000000087 stabilizing effect Effects 0.000 abstract 1
- 238000005259 measurement Methods 0.000 description 16
- 238000000034 method Methods 0.000 description 4
- 239000003129 oil well Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000035945 sensitivity Effects 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
- G01N9/00—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
- G01N9/36—Analysing materials by measuring the density or specific gravity, e.g. determining quantity of moisture
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/26—Oils; Viscous liquids; Paints; Inks
- G01N33/28—Oils, i.e. hydrocarbon liquids
- G01N33/2823—Raw oil, drilling fluid or polyphasic mixtures
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N9/00—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
- G01N9/26—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity by measuring pressure differences
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Measuring Volume Flow (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
Abstract
The invention discloses a flow controllable high-precision crude oil water content measuring instrument, which comprises: the device comprises a cavity, a micro differential pressure sensor I, a micro differential pressure sensor II, a cyclone, an electric ball valve, a collecting pipe, a double-U-shaped bent pipe, a heater and a flow control valve. The cavity is divided into a left cavity and a right cavity by a partition board, the swirler is connected with the right cavity and is used for separating gas phase in miscible liquid to be detected, the micro differential pressure sensor I is used for measuring the pressure difference of the two cavities with the liquid level, the micro differential pressure sensor II is used for detecting whether the liquid level of the right cavity reaches a specified height, the double U-shaped bent pipe is communicated with the cavity and a measuring port of the micro differential pressure sensor II, the flow control valve is used for stabilizing the flow of crude oil to be detected, and the heater is used for heating the crude. The measuring instrument disclosed by the invention can control the flow of crude oil to be measured, can heat low-temperature crude oil, can prolong the average continuous non-failure working time of the instrument, prolongs the service life of the instrument and has more accurate measuring result.
Description
Technical Field
The invention belongs to the field of crude oil monitoring, and particularly relates to a flow-controllable high-precision crude oil water content measuring instrument.
Background
In the process of crude oil exploitation, the proportion of oil and water is an important parameter for representing an oil field reservoir, and is also an important basis for making and adjusting an oil field exploitation scheme and optimizing production parameters, and the accurate measurement of the water content of crude oil has important significance for prolonging the service life of an oil-gas well and improving the recovery ratio.
The existing instrument for measuring the water content of crude oil mainly measures the pressure difference between the crude oil and a contrast liquid at the same liquid level through a micro-pressure sensor, and then calculates the water content of the crude oil by combining water and the density of the crude oil according to the measured pressure difference. The micro-pressure sensor measuring port of the existing crude oil water content measuring instrument is generally directly communicated with a crude oil measuring chamber or is connected with the measuring chamber through a single bent pipe, and the connecting mode has the following defects: after crude oil enters the measuring chamber, gas phase components in the crude oil can enter the top of the bent pipe, the gas phase components are easy to condense into liquid under a low-temperature environment, the liquid crude oil flows downwards along the bent pipe and flows to the micro-pressure sensor measuring port, the liquid crude oil is easy to solidify and blocks the micro-pressure sensor measuring port easily, and the micro-pressure sensor cannot be used normally.
The existing instrument is directly connected into a crude oil pipeline for measurement when crude oil measurement is carried out, different oil well flow rates are different, impact force on the measuring instrument is also different, when the crude oil flow rate of an oil well is larger, the impact force on the measuring instrument is larger, the liquid level in a measuring cavity of the measuring instrument is caused to fluctuate, and the final measuring result is inaccurate, or when the crude oil flow rate of the oil well is not uniform, the pressure in the measuring instrument cavity is influenced to a certain degree, the sensitivity of a micro-pressure sensor is extremely high, and the pressure change caused by the non-uniform crude oil flow rate inevitably causes errors in the measuring result, so the measuring instrument in the prior art has lower measuring accuracy.
In addition, when the temperature of the crude oil is within the range of 30-50 ℃, the measured water content of the crude oil is closest to the true value, no heating measure is adopted in the existing instrument, when the temperature of the crude oil is reduced, the measurement of the water content of the crude oil is not facilitated, and the deviation between the measured temperature and the true value is large.
Therefore, a crude oil water content measuring instrument is needed, which can realize controllable crude oil flow entering the measuring instrument, heat low-temperature crude oil and prolong the average continuous non-fault working time of the instrument.
Disclosure of Invention
In view of the above, the invention provides a flow-controllable high-precision crude oil water content measuring instrument, which can realize the functions of flow controllability and low-temperature crude oil heating, and can prolong the average continuous non-fault working time of the instrument, thereby performing more precise water content measurement.
In order to achieve the purpose, the invention adopts the following technical scheme: a controllable high accuracy crude oil moisture content measuring apparatu of flow, the instrument includes: cavity, little differential pressure sensor I, little differential pressure sensor II, swirler, electric ball valve, collecting pipe, the instrument still includes: the double-U-shaped bent pipe, the heater and the flow control valve;
the cavity comprises a left cavity and a right cavity, the two cavities are separated by a partition plate, and a convection port is reserved between the upper end of the partition plate and the top of the inner side of each cavity to enable the left cavity and the right cavity to be communicated; a spherical orifice plate is arranged at the upper part of the right cavity of the cavity, a tip part is arranged on the upper surface of the spherical orifice plate, and an orifice plate is arranged at the lower part of the right cavity;
a crude oil inlet pipe to be detected is arranged at the top of the upper part of the right cavity of the cavity, an outlet pipe is arranged at the lower part of the cavity, and an electric ball valve is mounted on the outlet pipe and connected into the confluence pipe;
the micro differential pressure sensor I is arranged at the lower end of the cavity, and two measuring ports of the micro differential pressure sensor I are respectively communicated with the left cavity and the right cavity of the cavity; the interfaces of the micro differential pressure sensor I and the cavity are positioned below the orifice plate, and the two interfaces are positioned at the equal height positions of the left chamber and the right chamber of the cavity;
the micro differential pressure sensor II is arranged at the upper part of the outer side of the cavity, one measuring port of the micro differential pressure sensor II is communicated with the left cavity of the cavity, and the other measuring port of the micro differential pressure sensor II is communicated with the top of the cavity;
the cyclone comprises: the device comprises a tangent inlet pipe, an overflow pipe, an inverted cone-shaped cavity and an outlet pipe II, wherein one end of the tangent inlet pipe is connected with a cavity right chamber, and the other end of the tangent inlet pipe is connected with the inverted cone-shaped cavity; one end of the outlet pipe II is connected with a smaller port of the inverted cone-shaped cavity, and the other end of the outlet pipe II is connected with the collecting pipe; one end of the overflow pipe is connected to the top of the inverted cone-shaped cavity, and the other end of the overflow pipe is connected with the outlet pipe II;
one end of the double U-shaped bent pipe is communicated with the top of the cavity, and the other end of the double U-shaped bent pipe is connected with the other measuring port of the micro differential pressure sensor II;
the outlet end of the heater is connected with an inlet pipe, and the inlet end of the heater is connected with an oil field oil pipeline;
the flow control valve is arranged at the inlet end of the heater.
Preferably, the double-U-shaped bent pipe comprises a main pipeline consisting of U-shaped pipes at two ends, and a liquid outlet is formed at the bottom of the lower U-shaped bent pipe.
The invention has the beneficial effects that: the invention discloses a high-precision crude oil water content measuring instrument with controllable flow, which adopts a mode of externally connecting double U-shaped bent pipes to communicate a micro-pressure sensor measuring port and a sealing test cavity, and a liquid outlet is arranged at the bottom of a lower U-shaped bent pipe, so that liquefied crude gas accumulated at the bottom of the lower U-shaped bent pipe can be timely discharged without blocking the micro-pressure sensor measuring port, the problem that a micro-pressure sensor is easy to lose efficacy is solved, and the service life of equipment is prolonged;
the instrument disclosed by the invention is internally provided with a heating device, and the crude oil to be measured is heated to the temperature range of 30-50 ℃, so that the measurement of the water content of the crude oil is ensured to be close to the real level;
in addition, the flow control valve can ensure that the oil temperature is kept within a certain temperature range through flow regulation when the heater power is constant, the heater power instability caused by flow fluctuation is avoided, and the energy-saving effect is achieved.
Drawings
FIG. 1 is a front view of an assembly structure of a flow-controllable high-precision crude oil water content measuring instrument according to the present invention;
FIG. 2 is a partial cross-sectional view of a flow-controllable high-precision crude oil water content measuring instrument according to the present invention;
FIG. 3 is an assembled perspective view of the flow-controllable high-precision crude oil water content measuring instrument of the present invention;
FIG. 4 is a top view of an assembly structure of the flow-controllable high-precision crude oil water content measuring instrument of the present invention;
FIG. 5 is a right side view of an assembly structure of the flow-controllable high-precision crude oil water content measuring instrument of the present invention;
FIG. 6 is a front view of a double U-bend of the present invention;
FIG. 7 is a left side view of a double U-bend of the present invention;
in the figure: 1. the cavity 2, the inlet pipe 3, the micro differential pressure sensor I4, the micro differential pressure sensor II 5, the double U-shaped bent pipe 6, the heater 7, the swirler 8, the outlet pipe 9, the electric ball valve 10, the confluence pipe 11, the convection port 12, the spherical orifice plate 13, the partition plate 14, the orifice plate 15, the flow control valve 71, the tangential inlet pipe 72, the overflow pipe 73, the inverted cone-shaped cavity 74 and the outlet pipe II.
Detailed Description
It will be appreciated by those of ordinary skill in the art that the embodiments described herein are intended to assist the reader in understanding the principles of the invention and are to be construed as being without limitation to such specifically recited embodiments and examples. Those skilled in the art can make various other specific changes and combinations based on the teachings of the present invention without departing from the spirit of the invention, and these changes and combinations are within the scope of the invention.
The invention is described in detail below with reference to the figures and specific embodiments.
The flow-controllable high-precision crude oil water content measuring instrument shown in figures 1 to 5 comprises the following components:
the cavity 1 comprises a left cavity and a right cavity, as shown in fig. 2, the two cavities are separated by a partition plate 13, the height of the partition plate is lower than that of the cavities, so that a convection port 11 is reserved between the upper end of the partition plate 13 and the top of the inner side of the cavity to communicate the left cavity and the right cavity; a spherical orifice plate 12 is arranged at the upper part of the right chamber of the cavity 1, and an orifice plate 14 is arranged at the lower part; the top and the bottom of the left cavity of the cavity 1 are respectively provided with a liquid inlet and a liquid outlet. Before the measurement, contrast liquid is injected into the left cavity, and the contrast liquid is the groundwater of the place where the oil of exploitation is located generally, during the measurement, constantly injects the crude oil mixed liquid that awaits measuring for the right cavity, and spherical orifice plate 12 makes progress bellied surface, and the crude oil velocity of flow that will pour into from the inlet tube falls to being close to zero, and orifice plate 14 carries out the second deceleration to crude oil liquid, makes the liquid of right cavity be in relative stillness, avoids external pressure fluctuation to the influence of measurement to the measuring precision has been improved. Contrast is injected through the inlet of the left chamber and discharged through the outlet thereof after measurement.
The right cavity of the cavity 1 is provided with an inlet pipe 2, the inlet pipe 2 is arranged at the top of the cavity 1 and is communicated with the right cavity, and the inlet pipe 2 is connected with a heater 6 and is used for injecting oil, gas and water mixed-phase crude oil fluid into the right cavity;
and one end of the outlet pipe 8 is communicated with the lower part of the right cavity of the cavity 1, the other end of the outlet pipe is connected with the collecting pipe 10, the interface of the right cavity and the outlet pipe 8 is arranged above the orifice plate 14, the outlet pipe 8 is provided with the electric ball valve 9, the outlet pipe 4 is used for discharging crude oil in the cavity 1, and the electric ball valve 9 controls the opening and closing of the outlet pipe opening 4.
The micro differential pressure sensor I3 is arranged at the lower end of the cavity 1, and two measuring ports of the micro differential pressure sensor I3 are respectively communicated with the left cavity and the right cavity of the cavity 1; the interface of the micro differential pressure sensor I3 and the cavity 1 is positioned below the pore plate 14, the two interfaces are positioned at the equal height positions of the left cavity and the right cavity of the cavity 1, the micro differential pressure sensor I3 is mainly used for measuring the pressure difference of the two cavities in the cavity, and then the water content of the crude oil is calculated by utilizing the pressure difference and the comparison liquid density.
The micro differential pressure sensor II4 is characterized in that the micro differential pressure sensor II4 is arranged at the upper part of the outer side of the cavity 1, one measuring port of the micro differential pressure sensor II4 is communicated with the left cavity of the cavity 1, and the other measuring port is communicated with the top of the cavity 1 through a double U-shaped bent pipe 5; the measuring port of the micro differential pressure sensor II4 and the interface of the cavity 1 are positioned below the spherical orifice plate 12; the micro differential pressure sensor II4 is mainly used for monitoring the liquid level position of crude oil injected into the right chamber, and when the crude oil liquid level reaches a set value, the electric ball valve 9 is opened after the water content measuring instrument collects data of the micro differential pressure sensor I3.
As shown in fig. 6 and 7, a liquid outlet is formed at the bottom of the lower U-shaped bent pipe of the double U-shaped bent pipe 5, and the double U-shaped bent pipe 5 is connected to the cavity 1 and the other measuring port of the differential pressure sensor II4, so that the blockage of the measuring port of the differential pressure sensor by the condensed crude oil can be avoided, for the following reasons: in gas phase crude oil can get into two U type return bends 5 when measuring, gas phase crude oil becomes liquid after the encounter cold, flows to U type return bend bottom down along the return bend, and U type return bend sets up the leakage fluid dram down, can in time get rid of liquid crude oil to the direct contact of crude oil with minute-pressure sensor measuring port has been avoided.
And the inlet end of the cyclone 7 is communicated with the right chamber of the cavity 1, and an interface for connecting the right chamber with the cyclone 7 is arranged at a position above the spherical orifice plate 12. As shown in fig. 2, the cyclone 7 includes: a tangent inlet pipe 71, an overflow pipe 72, an inverted cone-shaped cavity 73 and an outlet pipe II74, wherein one end of the tangent inlet pipe 71 is connected with the right cavity of the cavity 1, and the other end of the tangent inlet pipe is connected with the inverted cone-shaped cavity 73; one end of an outlet pipe II74 is connected with a smaller port of the inverted cone-shaped cavity 73, and the other end of the outlet pipe II74 is connected with the collecting pipe 10; overflow pipe 72 has one end connected to the top of inverted conical cavity 73 and the other end connected to outlet pipe II 74. The cyclone 7 is mainly used for realizing gas-liquid separation of crude oil in the measuring process, wherein an Archimedes spiral flow guide structure is arranged in the inverted cone cavity 73, so that gas and a small amount of liquid entering the cyclone do circular motion, and the moving radius is gradually reduced, so that the speed of a medium entering the cyclone is increased, a downward suction force is formed, and the discharge of the gas is accelerated; the overflow pipe 72 is arranged at the top of the cyclone 7, so that light gas can be discharged from the overflow pipe 72, and the pressure of the cyclone 7 is lower than that of the cavity 1 during measurement by an instrument, so that the gas-liquid separation speed can be further accelerated.
The heater 6 is arranged at the front end of the inlet pipe 2 and used for heating crude oil, so that the temperature of the crude oil entering the cavity of the measuring instrument is ensured to be within the temperature range of 30-50 ℃, and the measuring result is close to the real level.
The invention discloses a flow-controllable high-precision crude oil water content measuring instrument, which comprises the following measuring processes: during measurement, firstly, the crude oil entering the heater 6 is controlled through the flow control valve 15, then the crude oil to be measured is heated through the heater 6 and enters the cavity 1 and the cavity, contrast liquid is injected into the left cavity of the cavity 1, and the liquid level value and the threshold value of the liquid injected into the right cavity are set in the instrument control system; and then closing the electric ball valve 9 of the outlet pipe 8 to enable the crude oil liquid level of the right chamber of the injection cavity 1 to rise, when the micro differential pressure sensor II4 detects that the liquid level of the right chamber reaches a set liquid level value, acquiring the numerical value of the micro differential pressure sensor I3 by the controller, opening the electric ball valve 9 to enable the crude oil to be discharged smoothly, finally calculating the water content of the crude oil according to a pressure and density formula, and discharging gas and a small amount of liquid in the mixed phase fluid through a cyclone in the measurement process.
In summary, the flow-controllable high-precision crude oil water content measuring instrument disclosed by the invention adopts a mode of externally connecting double U-shaped bent pipes to communicate a micro-pressure sensor measuring port and a sealing test cavity, and a liquid discharge port is formed at the bottom of the lower U-shaped bent pipe, so that liquefied crude gas accumulated at the bottom of the lower U-shaped bent pipe can be timely discharged without blocking the micro-pressure sensor measuring port, the problem that a micro-pressure sensor is easy to lose efficacy is solved, and the service life of equipment is prolonged; the instrument disclosed by the invention is internally provided with a heating device, and the crude oil to be measured is heated to the temperature range of 30-50 ℃, so that the measurement of the water content of the crude oil is ensured to be close to the real level; in addition, the flow control valve can ensure that the oil temperature is kept within a certain temperature range through flow regulation when the heater power is constant, the heater power instability caused by flow fluctuation is avoided, and the energy-saving effect is achieved.
Claims (2)
1. A controllable high accuracy crude oil moisture content measuring apparatu of flow, the instrument includes: cavity (1), little differential pressure sensor I (3), little differential pressure sensor II (4), swirler (7), electric ball valve (9), collecting pipe (10), its characterized in that, the instrument still includes: a double U-shaped bent pipe (5), a heater (6) and a flow control valve (15);
the cavity (1) comprises a left cavity and a right cavity, the two cavities are separated by a partition plate (13), and a convection port (11) is reserved between the upper end of the partition plate (13) and the inner top of each cavity to enable the left cavity and the right cavity to be communicated; a spherical orifice plate (12) is arranged at the upper part of the right chamber of the cavity (1), a spine part is arranged on the upper surface of the spherical orifice plate (12), and an orifice plate (14) is arranged at the lower part of the right chamber;
a crude oil inlet pipe (2) to be detected is arranged at the top of the upper part of the right chamber of the cavity (1), an outlet pipe (8) is arranged at the lower part of the cavity, and an electric ball valve (9) is installed on the outlet pipe (8) and is connected into a collecting pipe (10);
the micro differential pressure sensor I (3) is arranged at the lower end of the cavity (1), and two measuring ports of the micro differential pressure sensor I (3) are respectively communicated with the left cavity and the right cavity of the cavity (1); the interfaces of the micro differential pressure sensor I (3) and the cavity (1) are positioned below the pore plate (14), and the two interfaces are connected at the equal-height positions of the left and right chambers of the cavity (1);
the micro differential pressure sensor II (4) is arranged at the upper part of the outer side of the cavity (1), one measuring port of the micro differential pressure sensor II (4) is communicated with the left cavity of the cavity (1), and the other measuring port is communicated with the top of the cavity (1) through a double U-shaped bent pipe (5);
the cyclone (7) comprises: the device comprises a tangent inlet pipe (71), an overflow pipe (72), an inverted cone-shaped cavity (73) and an outlet pipe II (74), wherein one end of the tangent inlet pipe (71) is connected with the upper part of a right chamber of the cavity (1), and the other end of the tangent inlet pipe is connected with the inverted cone-shaped cavity (73); one end of the outlet pipe II (74) is connected with a smaller port of the inverted conical cavity (73), and the other end of the outlet pipe II is connected with the collecting pipe (10); one end of the overflow pipe (72) is connected to the top of the inverted cone-shaped cavity (73), and the other end of the overflow pipe is connected with an outlet pipe II (74);
one end of the double U-shaped bent pipe (5) is communicated with the top of the cavity (1), and the other end of the double U-shaped bent pipe is connected with the other measuring port of the micro differential pressure sensor II (4);
the outlet end of the heater (6) is connected with the inlet pipe (2), and the inlet end of the heater is connected with an oil field oil pipeline;
the flow control valve (15) is arranged at the inlet end of the heater (6).
2. The flow-controllable high-precision crude oil water content measuring instrument according to claim 1, wherein the double-U-shaped bent pipe (5) comprises a main pipeline (51) composed of U-shaped pipes at two ends, and a liquid outlet (52) is formed at the bottom of the lower U-shaped bent pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011396661.2A CN112485156A (en) | 2020-12-03 | 2020-12-03 | Controllable high accuracy crude oil moisture content measuring apparatu of flow |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011396661.2A CN112485156A (en) | 2020-12-03 | 2020-12-03 | Controllable high accuracy crude oil moisture content measuring apparatu of flow |
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| CN112485156A true CN112485156A (en) | 2021-03-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011396661.2A Pending CN112485156A (en) | 2020-12-03 | 2020-12-03 | Controllable high accuracy crude oil moisture content measuring apparatu of flow |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113567297A (en) * | 2021-07-23 | 2021-10-29 | 四川速荣科技有限公司 | High-precision crude oil water content measuring instrument |
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2020
- 2020-12-03 CN CN202011396661.2A patent/CN112485156A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113567297A (en) * | 2021-07-23 | 2021-10-29 | 四川速荣科技有限公司 | High-precision crude oil water content measuring instrument |
| CN113567297B (en) * | 2021-07-23 | 2023-06-27 | 四川速荣科技有限公司 | High-precision crude oil water content measuring instrument |
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