CN212159639U - Oil well wellhead crude oil multi-parameter detection instrument with wide applicability - Google Patents
Oil well wellhead crude oil multi-parameter detection instrument with wide applicability Download PDFInfo
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Abstract
The utility model relates to a measurement field especially relates to oil well wellhead crude oil multi-parameter detecting instrument that suitability is wide in range. The detection instrument comprises a gas-liquid separator body (1), wherein the gas-liquid separator body (1) is composed of a first mixed liquid inlet (2), a second mixed liquid inlet (3), a sensing measurement unit insertion flange (4), an upper measurement instrument channel (20) and a lower measurement instrument channel (21), the first mixed liquid inlet (2) and the second mixed liquid inlet (3) are connected to a wellhead Christmas tree through a union or a flange respectively, and the sensing measurement unit insertion flange (4) is used for installing the sensing measurement unit. The device has the advantages of multiple functions, high measurement precision, stable operation and real-time online detection of the water content and/or the temperature and/or the pressure of the crude oil.
Description
Technical Field
The utility model relates to a measurement field especially relates to oil well wellhead crude oil multi-parameter detecting instrument that suitability is wide in range.
Background
Water content measurement aspect: at present, the method for measuring the water content of crude oil in various oil fields in China generally comprises two methods, namely an artificial measurement method and an on-line measurement method. Most of the methods adopt an artificial sampling and measuring method which is divided into a distillation method, an electric dehydration method and the like according to different oil-water separation methods; the density method is to determine the density value of the crude oil containing water and then calculate the water content according to the density of the pure oil and the density of the pure water. The short wave absorption method is to radiate electric energy into an oil-water medium in the form of electromagnetic wave and detect the water content in the oil-water mixture according to the difference of the absorption capacity of oil and water to the short wave. The principle of the high-energy ray method is that according to the difference of absorption capacities of oil and water to high-energy ray energy, a penetrating structure is adopted to measure the water content. The principle of the capacitance method is to measure the capacitance values of two electrode plates placed in an oil-water mixture, and further to calculate the dielectric constant of the oil-water mixture, thereby calculating the water content.
In the aspect of temperature measurement, because the production cost is limited, temperature measurement sensors are not installed at well heads of various large oil fields.
In the aspect of pressure measurement, because of being limited by production cost, pressure transmitters are not installed at well heads in various large oil fields, mechanical spring type pressure gauges are installed, data cannot be transmitted remotely, and meanwhile, the pressure transmitters are installed at well group headers.
The prior art has the following defects: in the aspect of water content measurement, the manual measurement method has the disadvantages of long sampling time, incapability of measuring in real time, high sampling randomness, time and labor waste and incapability of meeting the production requirements of intelligent oil fields; in the instrument of an online measurement method, the measurement error of a density method is large, certain potential safety hazard exists in the application process of a high-energy ray method, the short wave absorption method and the capacitance method are only suitable for monitoring low water-containing oil, the full-range accurate measurement cannot be realized, the online compensation and calibration capability is not realized, the mineralization degree has large influence on the measurement of the instrument, and meanwhile, no good measurement method exists for monitoring the gas-containing well at present.
In the aspect of temperature measurement, any monitoring equipment is not installed in each large oil field temporarily, and the wax precipitation condition of the well mouth is difficult to grasp.
In the aspect of pressure measurement, a mechanical spring pressure gauge is adopted, so that the measurement error is large, and data cannot be remotely transmitted.
Therefore, the oil field wellhead multi-parameter measuring device with low cost, good quality, multiple functions and high full-range measuring precision is lacked.
By applying for a search for new, there is currently no such patent.
SUMMERY OF THE UTILITY MODEL
The purpose of the utility model is that: the oil well wellhead crude oil multi-parameter detection instrument has better effect and wide applicability, and the specific purpose is to find a plurality of substantial technical effects of the specific implementation part.
In order to achieve the purpose, the utility model adopts the following technical proposal:
the oil well wellhead crude oil multi-parameter detection instrument with wide applicability is characterized in that the detection instrument comprises a gas-liquid separator body 1, the gas-liquid separator body 1 is composed of a mixed liquid inlet I2, a mixed liquid inlet II 3, a sensing measurement unit insertion flange 4, a measurement instrument upper channel 20 and a measurement instrument lower channel 21, wherein the mixed liquid inlet I2 and the mixed liquid inlet II 3 are respectively connected to a wellhead Christmas tree through a union or a flange, and the sensing measurement unit insertion flange 4 is used for installing the sensing measurement unit.
The utility model discloses a further technical scheme lies in, still contains blowdown ball valve 5, and blowdown ball valve 5 is used for realizing the blowdown function to the instrument.
The utility model discloses a further technical scheme lies in, sensing measuring unit inserts and installs more than one sensor on the flange 4, and sensing measuring unit flange 9 inserts flange 4 with sensing measuring unit and passes through bolt 10 with bolt 10 and be connected, and wherein bolt 10 is more than one, realizes that the sealing washer is sealed, zonulae occludens.
The utility model has the further technical proposal that the sensing and measuring unit mainly comprises an electromagnetic wave binding cover 6, a guided wave antenna 7, an electromagnetic wave binding baffle 8, a sensing and measuring unit flange 9, a pressure sensor 11, a temperature sensor 12 and a sensor shield 13; wherein the electromagnetic wave binding cover 6, the guided wave antenna 7 and the electromagnetic wave binding baffle 8 jointly form a moisture content sensing unit; the pressure sensor 11 constitutes a pressure sensing unit; the temperature sensor 12 constitutes a temperature sensing unit; the moisture content sensing unit, the pressure sensing unit and the temperature sensing unit are all arranged in the sensor shield 13; the sensor shield 13 is flange-connected to the sensor measuring unit by means of a screw thread.
The utility model discloses a further technical scheme lies in, guided wave antenna 7 is in between electromagnetic wave constraint cover 6 and the electromagnetic wave constraint baffle 8 to constitute by bar-shaped conductor, the surface adopts the high frequency insulating material parcel.
The utility model discloses a further technical scheme lies in, and electromagnetic wave constraint cover 6, electromagnetic wave constraint baffle 8 are the conductor, are connected to the sensing measuring unit through the welded mode.
The utility model discloses a further technical scheme lies in, and temperature sensor 12 is installed on sensing measuring unit flange 9 through the mode of pasting, realizes temperature non-contact measurement.
The utility model discloses a further technical scheme lies in, pressure sensor 11 is connected with sensing measurement unit flange 9 through the screw thread to 21 inside realization pressure contact that are linked together of passageway are measured with the measuring instrument down.
The utility model has the further technical proposal that the utility model also comprises a circuit control processing unit, a circuit board 15 is arranged inside the meter head, a first high-frequency electromagnetic wave feeder 16 is connected with one end of the guided wave antenna 7, and the other end of the guided wave antenna is connected with the circuit board 15 through the first high-frequency electromagnetic wave feeder 16; the pressure sensor 11 is connected to the circuit board 15 through a pressure signal line 18; the temperature sensor 12 is connected to the circuit board 15 through a temperature signal line 19.
The utility model has the further technical proposal that the circuit board 15 comprises the following modules, a programmable oscillator A1; coupler a 2; a phase detector a 3; the main control circuit a 4; a human interface circuit a 5; MODBUS communication circuit a 6;
water content measurement aspect: the programmable oscillator A1 generates 200Mhz-1Ghz high-frequency electromagnetic wave signals, the signals are output in two paths through a direct end and a coupling end through a coupler A2, the direct end with larger signal amplitude is connected to one end of a guided wave antenna 7, the other end of the guided wave antenna is connected to a phase discriminator A3, the coupling end with smaller signal amplitude is directly connected to a phase discriminator A3, phase comparison of the two paths of signals is achieved, and the phase discriminator A3 is connected to an A/D acquisition port of a main control circuit A4, so that water content signal acquisition of an oil production well is achieved.
Temperature measurement aspect: the temperature sensor 12 is directly connected to an A/D acquisition port of the main control circuit A4, a non-contact measurement mode is adopted, a high-precision integrated temperature chip is used for realizing the measurement, the working voltage is 4-30V, the measurement range is-50-150 ℃, and calibration is not needed.
And (3) pressure measurement: the pressure sensor 11 is directly connected to the A/D acquisition port of the main control circuit A4, the pressure of the measured medium directly acts on the diaphragm of the sensor in a silicon diffusion mode, the diaphragm is made of stainless steel or ceramic, the diaphragm generates micro displacement in proportion to the pressure of the medium, the resistance value of the sensor changes, an electronic circuit is used for detecting the change, a standard measurement signal corresponding to the pressure is converted and output, the power supply voltage is 3.3V, the output voltage is 0.5-2.5V, and the corresponding measuring range is 0-6 MPa.
The man-machine interface circuit A5 is connected to the main control circuit A4, and realizes parameter setting and related data display of the instrument.
MODBUS communication circuit A6 is connected to master control circuit A4, realizes the data teletransmission function of instrument.
Adopt above technical scheme the utility model discloses, for prior art have following beneficial effect: the gas-liquid separation instrument body mainly comprises 3 connecting ports which are respectively a mixed liquid inlet, a mixed liquid outlet and a sensing and measuring unit inserting port. When the mixed liquid enters the measuring instrument, the liquid enters the lower channel of the measuring instrument due to the action of gravity under the action of liquid impact, and the gas is lighter and enters the upper channel of the measuring instrument, so that the gas-liquid separation is realized. A sensing measurement unit is arranged at a lower channel of the measuring instrument to realize the measurement of water content, pressure and temperature. The device has the advantages of multiple functions, high measurement precision, stable operation and real-time online detection of the water content and/or the temperature and/or the pressure of the crude oil.
Drawings
For further explanation of the present invention, reference is made to the following description taken in conjunction with the accompanying drawings:
FIG. 1 is a block diagram of the instrument.
Wherein: 1-a gas-liquid separator body; 2-mixed liquid inlet I; 3-mixed liquid outlet II; 4-inserting the sensing measuring unit into the flange; 5-a blowdown ball valve; 6-electromagnetic wave binding cover; 7-a guided wave antenna; 8-electromagnetic wave binding baffle; 9-a sensing measurement unit flange; 10-bolt; 11-a pressure sensor; 12-a temperature sensor; 13-a sensor shield; 14-meter head; 15-a circuit board; 16-a first high-frequency electromagnetic wave feeder line; 17-a second high-frequency electromagnetic wave feeder line; 18-pressure signal line; 19-temperature signal line; 20-measuring the upper channel of the instrument; 21-measuring the instrument lower channel.
Fig. 2 is a circuit block diagram of the instrument.
Wherein: a 1-programmable oscillator; a 2-coupler; a3-phase detector; a4-master control circuit; a5-human interface circuit; A6-MODBUS communication circuit;
fig. 3 is a field connection diagram of the instrument.
Wherein: b1-producing well head; b2-production valve; b3 — first union or flange; b4-crude oil water content and/or temperature and/or pressure detecting instrument; b5 — a second union or flange; b6-sampling emptying valve; b7-back pressure valve; b8-needle pressure gauge.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings and embodiments, which are to be understood as illustrative only and not limiting the scope of the invention. In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "top", "bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The patent provides a plurality of parallel schemes, and different expressions belong to an improved scheme based on a basic scheme or a parallel scheme. Each solution has its own unique features.
With reference to all of the accompanying drawings; the oil well wellhead crude oil multi-parameter detection instrument with wide applicability is characterized in that the detection instrument comprises a gas-liquid separator body 1, the gas-liquid separator body 1 is composed of a mixed liquid inlet I2, a mixed liquid inlet II 3, a sensing measurement unit insertion flange 4, a measurement instrument upper channel 20 and a measurement instrument lower channel 21, wherein the mixed liquid inlet I2 and the mixed liquid inlet II 3 are respectively connected to a wellhead Christmas tree through a union or a flange, and the sensing measurement unit insertion flange 4 is used for installing the sensing measurement unit. The measuring instrument is based on the principle of multi-sensor fusion, and the device mainly comprises a gas-liquid separation instrument body, a sensing measuring unit and a circuit control processing unit.
The sensor measuring unit mainly comprises three parts: the temperature sensing unit adopts a non-contact measurement mode, is realized by using a high-precision integrated temperature chip, measures the working voltage of 4-30V, measures the range of minus 50-150 ℃, and does not need to be calibrated. The other is a pressure sensing unit, which adopts a silicon diffusion mode, the pressure of the measured medium directly acts on a diaphragm (stainless steel or ceramic) of the sensor, so that the diaphragm generates micro displacement in direct proportion to the pressure of the medium, the resistance value of the sensor changes, an electronic circuit is used for detecting the change, and a standard measurement signal corresponding to the pressure is converted and output, the power supply voltage is 3.3V, the output voltage is 0.5-2.5V, and the corresponding measuring range is 0-6 MPa. And thirdly, the moisture content sensing unit adopts an electromagnetic wave method, a beam of high-frequency electromagnetic waves passes through the guided wave antenna, and the electromagnetic waves generate phase change to a certain degree along with the change of the moisture content due to different dielectric properties and electrical conductivity of oil and water.
The circuit control processing unit is mainly realized by a single chip microcomputer system, and the pressure, the temperature and the water content of the wellhead of the oil well are finally obtained by acquiring and processing signals of the water content monitoring module, the pressure sensing module and the temperature sensing module.
The utility model has the advantages that:
the measuring instrument solves the technical bottleneck problems of inaccurate pressure measurement, unmeasured temperature, high labor intensity of manual sampling, low efficiency, high randomness, high error and the like aiming at the defects of pressure, temperature and water content measurement of the current oil well mouth. Compared with the density method, the short wave absorption method, the high energy ray method and the capacitance method of the existing on-line measuring method, the method overcomes the defects of large error, low reliability, narrow measuring range and the like. Meanwhile, the influence of the mineralization degree is avoided, the influence of gas is reduced to the maximum extent, and the method can be applied to high-gas-content oil wells.
In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be described in further detail with reference to the drawings.
Through structure and circuit optimal design, avoid the mineralization degree influence, the gaseous influence of at utmost reduces, improves the online measurement accuracy of moisture content, realizes that moisture content, temperature, the online accurate detection of pressure of oil well wellhead crude oil reduce crude oil manufacturing cost, reduction staff intensity of labour, improve oil field production management efficiency, promote the oil field digital management level.
The gas-liquid separator body 1 mainly comprises a mixed liquid inlet I2, a mixed liquid inlet II 3, a blowdown ball valve 5, a sensing measurement unit insertion flange 4, a measurement instrument upper channel 20 and a measurement instrument lower channel 21, wherein the mixed liquid inlet I2 and the mixed liquid inlet II 3 are respectively connected to a wellhead Christmas tree through a union or a flange, the sensing measurement unit insertion flange 4 is used for installing the sensing measurement unit, and the blowdown ball valve 5 is used for realizing a blowdown function on an instrument.
Further, when the mixed liquid enters the measuring instrument, the liquid enters the lower channel 21 of the measuring instrument due to the action of gravity under the action of liquid impact, and the gas is lighter and enters the upper channel 20 of the measuring instrument, so that gas-liquid separation is realized. A sensing measurement unit is arranged at a lower channel 21 of the measuring instrument to realize the measurement of water content, pressure and temperature.
The sensing measurement unit mainly comprises an electromagnetic wave bound cover 6, a guided wave antenna 7, an electromagnetic wave bound baffle 8, a sensing measurement unit flange 9, a pressure sensor 11, a temperature sensor 12 and a sensor shield 13. Wherein the electromagnetic wave binding cover 6, the guided wave antenna 7 and the electromagnetic wave binding baffle 8 jointly form a moisture content sensing unit; the pressure sensor 11 constitutes a pressure sensing unit; the temperature sensor 12 constitutes a temperature sensing unit; the moisture content sensing unit, the pressure sensing unit and the temperature sensing unit are all arranged in the sensor shield 13; the sensor shield 13 is flange-connected to the sensor measuring unit by means of a screw thread.
Further, the guided wave antenna 7 is located between the electromagnetic wave binding cover 6 and the electromagnetic wave binding baffle 8, and is composed of a rod-shaped conductor, and the surface of the rod-shaped conductor is wrapped by a high-frequency insulating material.
Furthermore, the electromagnetic wave binding cover 6 and the electromagnetic wave binding baffle 8 are both conductors and are connected to the sensing and measuring unit by welding.
Further, the temperature sensor 12 is mounted on the sensing and measuring unit flange 9 in a sticking manner, so that temperature non-contact measurement is realized.
Further, the pressure sensor 11 is connected with the sensing and measuring unit flange 9 through threads and communicated with the inside of the lower channel 21 of the measuring instrument to realize pressure contact measurement.
The sensing measurement unit flange 9 and the sensing measurement unit insertion flange 4 are connected through bolts 10, wherein the bolts 10 are more than 1, and sealing and tight connection of the sealing rings are realized.
The circuit control processing unit mainly comprises an instrument gauge head 14, a circuit board 15, a high-frequency electromagnetic wave feeder line I16, a high-frequency electromagnetic wave feeder line II 17, a pressure signal line 18 and a temperature signal line 19. The circuit board 15 is arranged inside the instrument gauge head 14, the first high-frequency electromagnetic wave feeder 16 is connected with one end of the guided wave antenna 7, and the other end of the guided wave antenna is connected to the circuit board 15 through the second high-frequency electromagnetic wave feeder 17; the pressure sensor 11 is connected to the circuit board 15 through a pressure signal line 18; the temperature sensor 12 is connected to the circuit board 15 through a temperature signal line 19.
Fig. 2 is a schematic block circuit diagram of the instrument. The components in the figure are respectively as follows: a programmable oscillator a 1; coupler a 2; a phase detector a 3; the main control circuit a 4; a human interface circuit a 5; MODBUS communication circuit A6
The specific working principle is as follows:
water content measurement aspect: the programmable oscillator A1 generates 200Mhz-1Ghz high-frequency electromagnetic wave signals, the signals are output in two paths through a direct end and a coupling end through a coupler A2, the direct end with larger signal amplitude is connected to one end of a guided wave antenna 7, the other end of the guided wave antenna is connected to a phase discriminator A3, the coupling end with smaller signal amplitude is directly connected to a phase discriminator A3, phase comparison of the two paths of signals is achieved, and the phase discriminator A3 is connected to an A/D acquisition port of a main control circuit A4, so that water content signal acquisition of an oil production well is achieved.
Temperature measurement aspect: the temperature sensor 12 is directly connected to an A/D acquisition port of the main control circuit A4, a non-contact measurement mode is adopted, a high-precision integrated temperature chip is used for realizing the measurement, the working voltage is 4-30V, the measurement range is-50-150 ℃, and calibration is not needed.
And (3) pressure measurement: the pressure sensor 11 is directly connected to the A/D acquisition port of the main control circuit A4, the pressure of the measured medium directly acts on the diaphragm (stainless steel or ceramic) of the sensor by adopting a silicon diffusion mode, so that the diaphragm generates micro displacement in direct proportion to the pressure of the medium, the resistance value of the sensor is changed, the change is detected by using an electronic circuit, a standard measurement signal corresponding to the pressure is converted and output, the power supply voltage is 3.3V, the output is 0.5-2.5V, and the corresponding range is 0-6 MPa.
Further, the human-computer interface circuit a5 is connected to the main control circuit a4, and realizes parameter setting and related data display of the meter.
Further, the MODBUS communication circuit a6 is connected to the master control circuit a4, so as to realize the data remote transmission function of the meter.
And (3) data calculation processing:
the patent of the utility model provides a wide range oil well wellhead crude oil moisture content of suitability and/or temperature and/or pressure measurement instrument and method, including following step:
firstly, in the instrument power supply mode, calibration is required for the parameters related to water content measurement, and at normal temperature, in air (pure oil), the phase difference P (1) when the water content is 0% is recorded, in a mixed solution containing 10% of water, the phase difference P (2) when the water content is 10% is recorded, in a mixed solution containing 20% of water, the phase difference P (3) when the water content is 20% is recorded, and the like, the phase difference P (11) when the water content is 100% is recorded.
Further, numerical simulation is adopted to realize the functional relation between the phase difference and the water content: HS, F { P (i) }, as the initial calibration function of the water content of the parameter instrument;
secondly, the temperature measurement adopts a cyclic shift mode to realize the real-time average value of any temperature data and eliminate abnormal temperature jitter;
and finally, the pressure measurement adopts a cyclic shift mode to realize the real-time average value of any pressure data and eliminate abnormal pressure jitter.
FIG. 3 is a field connection diagram of the instrument. Each component in the figure is a production well wellhead B1; production valve B2; a first union or flange B3; a crude oil water content and/or temperature and/or pressure detecting instrument B4; a second union or flange B5; a sampling emptying valve B6; back pressure valve B7; pointer pressure gauge B8.
The specific installation process is as follows:
firstly, stopping the oil pumping unit, and closing a production valve B2 and a back pressure valve B7; secondly, open sample atmospheric valve B6, observe pointer manometer B8, after pressure drops 0, install crude oil moisture content and/or temperature and/or pressure detection instrument B4 fast, realize the hard joint by first union or flange B3, second union or flange B5, ensure not to have the phenomenon of the leakage of running and leaking.
1. The 'liquid impact' principle is used to realize simple separation of gas and liquid at the well mouth, thereby reducing the influence of the gas content of the crude oil on the water content measurement result to the maximum extent and being suitable for measuring the water content of the crude oil in each gas-containing oil field.
2. The electromagnetic wave phase measurement principle is used to realize the full-range measurement of the water content of 0-100%, and the method is suitable for the change of the water content of the oil field well head.
3. The typical waveguide structure design ensures that the measurement result is not influenced by the mineralization degree, and is suitable for measuring the water content of crude oil at various layers.
4. The special circuit for the sensor improves the operating frequency and the signal acquisition and conversion speed of the radio frequency signal transmitter and the receiver, so that the water-containing sampling speed of the probe reaches millisecond level and far exceeds the flow speed of oil-water mixed liquid at a well head, thereby greatly improving the sampling precision and having the characteristic of wide measurement range (0-100%).
5. The probe has a simple structure, and ensures smooth passing of an oil-water medium; the contact surface of the guided wave antenna and oil water is treated by special insulating materials, has the characteristics of high insulating degree, high temperature resistance of 150 ℃, corrosion resistance and wear resistance, and is suitable for a sand production well.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are intended to illustrate the principles of the invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention, all of which are intended to be covered by the appended claims.
Claims (10)
1. The oil well wellhead crude oil multi-parameter detection instrument with wide applicability is characterized in that the detection instrument comprises a gas-liquid separator body (1), the gas-liquid separator body (1) is composed of a mixed liquid inlet I (2), a mixed liquid inlet II (3), a sensing measurement unit insertion flange (4), a measurement instrument upper channel (20) and a measurement instrument lower channel (21), wherein the mixed liquid inlet I (2) and the mixed liquid inlet II (3) are respectively connected to a wellhead Christmas tree through a union or a flange, and the sensing measurement unit insertion flange (4) is used for installing the sensing measurement unit.
2. The wide-applicability oil well wellhead crude oil multi-parameter detection instrument as claimed in claim 1, characterized by further comprising a blowdown ball valve (5), wherein the blowdown ball valve (5) is used for realizing a blowdown function for the instrument.
3. The wide-applicability oil well wellhead crude oil multi-parameter detection instrument as claimed in claim 1, characterized in that more than one sensor is installed on the sensing measurement unit insertion flange (4), the sensing measurement unit flange (9) is connected with the sensing measurement unit insertion flange (4) through bolts (10), wherein more than one bolt (10) realizes sealing and tight connection of a sealing ring.
4. The wide-applicability crude oil multi-parameter detection instrument for the oil well head as claimed in claim 1, wherein the sensing measurement unit is mainly composed of an electromagnetic wave binding cover (6), a guided wave antenna (7), an electromagnetic wave binding baffle (8), a sensing measurement unit flange (9), a pressure sensor (11), a temperature sensor (12) and a sensor shield (13); wherein the electromagnetic wave binding cover (6), the guided wave antenna (7) and the electromagnetic wave binding baffle (8) jointly form a moisture content sensing unit; the pressure sensor (11) constitutes a pressure sensing unit; the temperature sensor (12) constitutes a temperature sensing unit; the water content sensing unit, the pressure sensing unit and the temperature sensing unit are all arranged in the sensor shield (13); the sensor shield (13) is flange-connected with the sensing and measuring unit through threads.
5. The wide-applicability crude oil multiparameter detection instrument at the wellhead of an oil well as defined in claim 4, wherein the guided wave antenna (7) is arranged between the electromagnetic wave binding cover (6) and the electromagnetic wave binding baffle (8) and is composed of a rod-shaped conductor, and the surface of the rod-shaped conductor is wrapped by a high-frequency insulating material.
6. The wide-applicability crude oil multi-parameter detection instrument at the oil well head as claimed in claim 4, characterized in that the electromagnetic wave binding cover (6) and the electromagnetic wave binding baffle (8) are both conductors and are connected to the sensing and measuring unit by welding.
7. The wide-applicability oil well wellhead crude oil multi-parameter detection instrument as claimed in claim 4, characterized in that the temperature sensor (12) is mounted on the sensing measurement unit flange (9) in a sticking mode, and temperature non-contact measurement is realized.
8. The wide-applicability oil well head crude oil multiparameter detecting instrument as claimed in claim 4, wherein the pressure sensor (11) is connected with the sensing and measuring unit flange (9) through threads and communicated with the inside of the lower channel (21) of the detecting instrument to realize pressure contact measurement.
9. The wide-applicability crude oil multiparameter detection instrument at the wellhead of the oil well as defined in claim 4, further comprising a circuit control processing unit, wherein the circuit board (15) is arranged inside the instrument gauge head, the first high-frequency electromagnetic wave feeder (16) is connected with one end of the guided wave antenna (7), and the other end of the guided wave antenna is connected to the circuit board (15) through the first high-frequency electromagnetic wave feeder (16); the pressure sensor (11) is connected to the circuit board (15) through a pressure signal line (18); the temperature sensor (12) is connected to the circuit board (15) through a temperature signal line (19).
10. The broad applicability oil well wellhead crude oil multiparameter detection instrument as defined in claim 9, wherein the circuit board (15) comprises modules, a programmable oscillator (a 1); a coupler (A2); a phase detector (A3); a master control circuit (A4); a human-machine interface circuit (A5); MODBUS communication circuit (a 6);
water content measurement aspect: the programmable oscillator (A1) generates 200Mhz-1Ghz high-frequency electromagnetic wave signals, the signals are output in two paths through a coupler (A2) and a direct end and a coupling end, wherein the direct end with larger signal amplitude is connected to one end of a guided wave antenna (7), the other end of the guided wave antenna is connected to a phase discriminator (A3), the coupling end with smaller signal amplitude is directly connected to the phase discriminator (A3) so as to realize phase comparison of the two paths of signals, and the phase discriminator (A3) is connected to an A/D acquisition port of a main control circuit (A4) so as to realize acquisition of water content signals of an oil production well;
temperature measurement aspect: the temperature sensor (12) is directly connected to an A/D acquisition port of the main control circuit (A4), a non-contact measurement mode is adopted, a high-precision integrated temperature chip is used for realizing the measurement, the working voltage is 4-30V, the measurement range is-50-150 ℃, and calibration is not needed;
and (3) pressure measurement: the pressure sensor (11) is directly connected to an A/D acquisition port of a main control circuit (A4), the pressure of a measured medium directly acts on a diaphragm of the sensor in a silicon diffusion mode, the diaphragm is made of stainless steel or ceramic, the diaphragm generates micro displacement in direct proportion to the pressure of the medium, the resistance value of the sensor changes, an electronic circuit is used for detecting the change, a standard measurement signal corresponding to the pressure is converted and output, the power supply voltage is 3.3V, 0.5-2.5V is output, and the corresponding measuring range is 0-6 MPa;
the human-computer interface circuit (A5) is connected to the main control circuit (A4) to realize the parameter setting and the relevant data display of the instrument;
the MODBUS communication circuit (A6) is connected to the main control circuit (A4) to realize the data remote transmission function of the instrument.
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| CN117288803A (en) * | 2023-11-24 | 2023-12-26 | 抚顺市明尧石油机械有限公司 | Liquid phase sensor and method for detecting oil content of crude oil produced liquid |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117288803A (en) * | 2023-11-24 | 2023-12-26 | 抚顺市明尧石油机械有限公司 | Liquid phase sensor and method for detecting oil content of crude oil produced liquid |
| CN117288803B (en) * | 2023-11-24 | 2024-02-27 | 抚顺市明尧石油机械有限公司 | Liquid phase sensor and method for detecting oil content of crude oil produced liquid |
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