CN211692435U

CN211692435U - Flange type oil production well mouth multi-parameter measuring instrument

Info

Publication number: CN211692435U
Application number: CN201921875307.0U
Authority: CN
Inventors: 薛宗营; 汪铄弦; 高静
Original assignee: Shaanxi Yongkai Technology Co ltd
Current assignee: Shaanxi Yongkai Technology Co ltd
Priority date: 2019-10-31
Filing date: 2019-10-31
Publication date: 2020-10-16
Anticipated expiration: 2029-10-31

Abstract

The utility model relates to a petroleum industry oil well dynamic test technical field especially relates to a flange formula oil recovery well head multi-parameter measuring apparatu. The mounting structure comprises a stainless steel pipe at the lower part, flanges are arranged on two sides of the stainless steel pipe, a sensor cavity shield is mounted on the stainless steel pipe, the sensor cavity shield and the stainless steel pipe are integrally connected, more than one sensor is mounted in the sensor cavity shield, and the series of sensors are in communication connection with an instrument meter head at the upper part; this patent can realize the accurate measurement and the data teletransmission of single-well's crude oil moisture content, temperature, pressure simultaneously. The problems that the existing water content measurement precision is poor, a temperature sensor is not installed, a pressure sensor cannot remotely transmit and the like are solved, reliable data are provided for crude oil production, the production cost and the labor intensity of field workers are reduced, and the digital management level of an intelligent oil field is improved.

Description

Flange type oil production well mouth multi-parameter measuring instrument

Technical Field

The utility model relates to a petroleum industry oil well dynamic test technical field especially relates to a flange formula oil recovery well head multi-parameter measuring apparatu.

Background

The prior oil well mouth multi-parameter measurement technology (mainly comprising an independent sensor):

at present, no measuring instrument capable of simultaneously testing the water content, the temperature and the pressure of a wellhead of an oil production well exists in China, independent sensors are mainly used for respectively measuring, and the prior art has the disadvantages of high production cost, complex field process flow and inconvenience for production management.

And (3) measuring the water content: there are generally two categories, namely manual and on-line. 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 small part adopts an on-line measuring method, mainly comprising a density method, a short wave absorption method, a high energy ray method, a capacitance method and the like. 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 value of a cylindrical capacitor 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, a pressure transmitter is not installed at a wellhead in each large oil field, a mechanical spring type pressure gauge is installed, and data cannot be remotely transmitted.

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, high labor intensity, certain potential safety hazard, incapability of real-time measurement, high sampling randomness and incapability of meeting the production requirements of intelligent oil fields; in an online measurement instrument, a density method has large measurement error, a certain potential safety hazard exists in the application process of a high-energy ray method, a short wave absorption method and a capacitance method are only suitable for monitoring low water-containing oil, cannot realize accurate measurement of a full range, do not have online compensation and calibration capacity, and have large influence on instrument measurement by mineralization degree, and meanwhile, no good measurement method exists for monitoring a gas-containing well at present.

In the aspect of temperature measurement, any monitoring equipment is not installed in each large oil field temporarily, the wax precipitation condition of a wellhead is difficult to grasp, the wax precipitation rule of an oil well cannot be tracked, and meanwhile, the hot washing effect of the oil well cannot be evaluated.

In the aspect of pressure measurement, a mechanical spring pressure gauge is adopted, so that the measurement error is large, the frequent freezing and blocking phenomenon exists in the low-temperature environment in winter, the failure rate is high, the normal production management is seriously influenced, and the operation cost is greatly increased. Meanwhile, data cannot be transmitted remotely, and the pressure change rule of a single well cannot be mastered.

Therefore, the oil field wellhead multi-parameter measuring instrument with low cost, good quality, multiple functions and high full-range measuring precision is lacked.

The existing crude oil physical property measurement technology comprises the following steps:

at present, a measuring system capable of simultaneously testing the water content, the mineralization degree, the temperature and the pressure of a wellhead of an oil production well is unavailable at home, wherein the temperature and the pressure are mainly measured by independent sensors respectively, and the water content and the mineralization degree are mainly tested by traditional manual sampling.

The prior art has the following defects:

the water content and the mineralization degree mainly depend on manual measurement, the testing efficiency is low, the testing cost is high, and particularly, in the aspect of mineralization degree testing, expensive chemical agents are needed for carrying out the water content and the mineralization degree. The consumption cost (including 1.1 million yuan of manpower cost, 5000 million of transportation cost, 2000 million of testing cost and 260 million of hazardous waste treatment cost) of the water content and the mineralization degree test in an oil field of 5 million oil wells is up to 1.8 million yuan each year.

The temperature transmitter and the pressure transmitter are independently installed, the installation cost is high, the process flow is complex due to repeated firing operation of the field process flow, the cost is up to 2 hundred million yuan due to the fact that the pressure transmitter and the temperature transmitter are all installed in the 50000 oil well oil field.

The various measuring methods and measuring instruments are not effectively integrated, mutual compensation and calibration cannot be carried out, certain errors exist in measurement and measurement, meanwhile, the maintenance cost is relatively high, and the annual maintenance cost is up to 1000 ten thousand yuan for the calculation of an oil field with 5 ten thousand oil wells.

The prior art has the disadvantages of low working efficiency, high production cost, complex field process flow and no contribution to production management.

Therefore, a crude oil physical property measuring system with low cost, good quality, multiple functions and high measuring precision in the whole range is lacked.

SUMMERY OF THE UTILITY MODEL

The purpose of the utility model is that: in order to provide a better-effect multi-parameter measuring instrument and a measuring method for a wellhead of a flange-type oil production well, the specific purpose is to see 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 first scheme is as follows:

a multi-parameter measuring instrument for a flange type oil production well mouth is characterized in that the mounting structure comprises a stainless steel pipe 2 at the lower part, flanges 1 are arranged on two sides of the stainless steel pipe 2, a sensor cavity shield 4 is mounted on the stainless steel pipe, the sensor cavity shield 4 and the stainless steel pipe 2 are integrally connected, more than one sensor is mounted in the sensor cavity shield 4, and the series of sensors are in communication connection with an instrument gauge head 5 at the upper part; the output of the sensor cavity shield 4 is connected with a vertical shaft with external threads, an instrument gauge head 5 is arranged on the vertical shaft with external threads, and the circuit of more than one sensor passes through the hollow part of the vertical shaft with threads to be connected with a circuit board 6 in the gauge head.

The utility model discloses a further technical scheme lie in, the sensor be sensor module, sensor module contain one or more of following module: the device comprises a pressure sensor 9, a temperature sensor 10 and a water-containing monitoring waveguide sensing module; the moisture monitoring waveguide sensing module comprises a moisture detection module E1 and a waveguide resonant cavity, wherein the moisture detection module E1 is connected with the waveguide resonant cavity by a radio frequency wire to jointly form the moisture monitoring waveguide sensing module.

The utility model has the further technical proposal that the flange 1 and the stainless steel pipe 2 jointly form an auxiliary unit; the stainless steel tube 2 and the transmission line 12 jointly form a waveguide resonant cavity; the sensor cavity shield 4, the water-containing monitoring waveguide sensing module, the pressure sensor 9 and the temperature sensor 10 form a measuring cavity together; the meter head 5 forms a circuit control processing unit; the transmission line bracket I3 and the transmission line bracket II 11 are connected with the stainless steel pipe 2 through threads; the transmission line 12 penetrates through the first transmission line support 3 and the second transmission line support 11 from the center, and the transmission line 12 is filled with high-pressure sealant 8 in the peripheries of the transmission lines in the first transmission line support 3 and the second transmission line support 11; the pressure sensor 9 is connected with the stainless steel pipe 2 by screw threads and can be used for measuring the pressure in the pipeline; the temperature sensor 10 and the stainless steel pipe 2 are bonded in a surface-mount manner to measure the temperature in the pipeline; the circuit board 6 is arranged in the instrument gauge head 5; the moisture detection module E1, the pressure sensor 9 and the temperature sensor 10 are connected with the circuit board 6 by leads and signal wires; the transmission line 12 is made of a metal conductor coated with a high-frequency insulating material which can stably transmit electromagnetic waves but is highly insulating.

The utility model has the further technical proposal that the circuit board is also in communication connection with a display screen E2, a serial port module ModBusE3, a peripheral power supply circuit E4 and a key combination E7; the circuit board comprises a main control module E8; the peripheral power supply circuit E4 is used to supply power to the entire circuit board; the serial port module ModBusE3 is connected with the main control module E8 through a UART interface and is used for realizing communication with an upper computer; the display screen E2 is connected with the main control module E8 through a bus interface and is used for displaying measured values of water content, temperature and pressure; the key combination E7 is connected with the main control module E8 through an IO interface and is used for setting instrument parameters; the moisture content detection module E1 is connected to the A/D interface of the main control module E8 through a lead and is used for measuring the moisture content; the pressure sensing module E5 is connected to the A/D interface of the main control module E8 through a lead and is used for measuring the pressure of a well head; the temperature sensing module E6 is connected to the A/D interface of the main control module E8 through a lead, and is used for measuring the oil temperature and compensating the water content.

The utility model discloses a further technical scheme lies in, the flange mounting in following pipeline, this pipeline be horizontal pipeline, the oil recovery well pipeline is being connected in horizontal pipeline left side, contains oil pressure gate C1 on this horizontal pipeline, vertical pipeline is being connected on horizontal pipeline right side, the position that horizontal pipeline and vertical pipe connection contain atmospheric gate C2, contain back pressure gate C3 on the vertical pipeline.

A method for measuring a multi-parameter measuring instrument of a wellhead of a flange type oil production well is characterized in that the measuring instrument comprises a water content measuring step, a programmable oscillator D1 emits electromagnetic waves with constant frequency, the electromagnetic waves pass through a coupler D2, high-power high-frequency signals which are directly led to an output end enter one end of a waveguide resonant cavity D5 through which an oil-water mixture 13 flows through a radio frequency transmission line D3, and then enter a phase difference detector D4 through the radio frequency transmission line from the other end of the waveguide resonant cavity D5; wherein, the low-power high-frequency signal at the coupling output end directly enters the numerical control phase shifter D6 and then enters the phase difference detector D4. Due to the large dielectric constant difference of the oil-water mixture, the two signals have different phase differences along with the change of the water content. In order to further improve the water content measurement accuracy, the numerical control phase shifter D6 can modulate the phase difference of the two paths of signals at the optimal detection state of 0-180 degrees or 180-0 degrees, then the phase difference is detected by the phase difference detector D4, and the voltage signals are output to the main control circuit board 6, so that the water content is obtained.

The utility model discloses a further technical scheme lies in, under the multi-parameter appearance power supply mode, need mark the relevant parameter of moisture measurement, under normal atmospheric temperature, in air (pure oil), phase difference P (1) when recording moisture 0%, in the mixed liquid of moisture 10%, phase difference P (2) when recording moisture 10%, in the mixed liquid of moisture 20%, phase difference P (3) when recording moisture 20%, so on, phase difference P (11) when recording moisture 100%; 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;

meanwhile, the functional relation between the phase difference and the water content under different temperature, pressure and gas-containing conditions is obtained by the same method:

HS ═ F (t, b, a) { p (i) }, as the final calibration function for water cut of the parameter meter.

The utility model discloses a further technical scheme lies in, still contains pressure measurement step and temperature measurement step before moisture content measurement step, the pressure measurement step, fluid through high pressure joint B2, with sensing diaphragm B3 contact, lead to sensing diaphragm B3 to take place elastic deformation, evaluate circuit B4 and monitor the voltage change because of deformation production, through handling the back, with pressure signal through electric interface B5 output.

And a temperature measuring step, namely after the circuit board supplies power to a power supply anode V + A1 and a power supply cathode GNDA3 of the temperature sensor, the power supply voltage is 5V, and the signal output end OUTA2 stably outputs 0-5V signals, wherein the corresponding temperature measuring range is-50-150 ℃, and calibration is not needed.

Adopt above technical scheme the utility model discloses, for prior art have following beneficial effect: safe and environment-friendly: the direct contact between staff and toxic and harmful gases such as crude oil, hydrogen sulfide and the like is avoided, and the treatment and discharge of sampling sump oil are reduced (taking 5 ten thousand wells as an example, the annual discharge amount is reduced by about 3000 square);

the production cost is as follows: taking a 5-ten-thousand-well scale production unit as an example, the annual labor cost is saved by 1.1 million yuan, and the cost of an assay instrument and a material is 5500 ten thousand yuan; compared with an independent sensor, the cost is saved by about 1 million yuan.

The technical innovation aspect is as follows:

(1) the multi-sensor fusion mode can realize real-time acquisition of water content, temperature and pressure data, can timely find out the abnormal fluctuation phenomenon of water content, shortens the abnormal water content finding time by 10-20 days compared with the traditional operation mode, and meanwhile, can effectively monitor the wax deposition rule and the hot washing effect of an oil well, and greatly improves the dynamic oil reservoir control efficiency.

(2) The water content measurement adopts advanced technologies such as a waveguide resonance method, numerical control phase shift and the like, the full-range measurement of 0-100% of water content is realized, the influence of factors such as water-in-oil, oil-in-water, mineralization degree, gas content and the like on the water content measurement is effectively solved, and the measurement precision is improved to +/-3%.

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 schematic structural view of the present invention;

FIG. 2 is a schematic diagram of the internal structure of the pressure sensor;

FIG. 3 is a schematic view of a moisture monitoring waveguide sensing module;

FIG. 4 is a schematic diagram of a temperature sensor configuration;

FIG. 5 is a connection diagram of the integral module;

FIG. 6 is a schematic view of the position of the present patent installation;

FIG. 7 is a main interface implementation of the assay of this patent;

FIG. 8 is a schematic interface diagram of the patented well information maintenance;

FIG. 9 is a schematic of an embodiment of a stand-alone embodiment;

FIG. 10 is a graph of the effect of waxing on water cut;

FIG. 11 is the mineralization effect;

wherein: 1, a flange, 2, stainless steel pipes, 3, transmission line supports, 4, sensor cavity shields, 5, instrument heads, 6, circuit boards, 8, high-pressure sealant, 9, pressure sensors, 10, temperature sensors, 11, transmission line supports, 12, transmission lines, 13 and an oil-water mixture; b1, a fixed thread, B2, a high-voltage connector, B3, a sensing diaphragm, B4, an evaluation circuit, B5 and an electrical interface; d1, a programmable oscillator, D2, a coupler, D3, a radio frequency transmission line, D4, a phase difference detector, D5, a waveguide resonant cavity, D6 and a numerical control phase shifter; a1, V +, a2, OUT, A3, GND; e1, a moisture detection module, E2, a display screen, E3, a serial port module ModBus, E4, a peripheral power circuit, E5, a pressure sensing module, E6, a temperature sensing module, E7, a key combination, E8 and a main control module; c1, an oil pressure gate, C2, a back pressure gate, C3 and an emptying gate; the device comprises an X1-programmable oscillator, an X2-multi-channel signal distributor, an X3-amplitude difference detector, an X4-main control circuit board, an X5-coupler, an X6-numerical control phase shifter, an X7-phase difference detector, an X8-water-containing guided wave transmission line bracket I, an X9-mineralization-degree guided wave transmission line bracket I, an X10-mineralization-degree guided wave transmission line bracket II, an X11-water-containing guided wave transmission line bracket II, an X12-pressure sensor, an X13-temperature sensor, an X14-metal shell, an X15-double-wave guide resonant cavity, an X16-oil-water mixture, an X17-water-containing guided wave transmission line and an X18-mineralization guided wave transmission line.

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.

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.

Embodiment one, combine fig. 1;

the mounting structure comprises a stainless steel pipe 2 at the lower part, flanges 1 are arranged on two sides of the stainless steel pipe 2, a sensor cavity shield 4 is arranged on the stainless steel pipe, the sensor cavity shield 4 and the stainless steel pipe 2 are integrally connected, more than one sensor is arranged in the sensor cavity shield 4, and the series of sensors are in communication connection with an instrument gauge head 5 at the upper part; the output of the sensor cavity shield 4 is connected with a vertical shaft with external threads, an instrument gauge head 5 is arranged on the vertical shaft with external threads, and the circuit of more than one sensor passes through the hollow part of the vertical shaft with threads to be connected with a circuit board 6 in the gauge head.

The technical scheme of the invention has the following substantial technical effects and the realization process: this patent provides specific mounting structure, synthesizes for multisensor and write and provide basic structure basis, provides the physical basis for each group's information of intelligent integration.

In a second embodiment, as a further improved scheme or a parallel scheme, the principle of the measuring instrument is that a multi-sensor fusion method is adopted to effectively integrate the moisture content, temperature and pressure sensing units. It should be noted that the types of the measured indexes in this paragraph are relatively independent and can be flexibly combined, and the measurement of each index is independent and does not affect each other. The following three important groups of units are described as preferable.

The measurement chamber mainly contains three important groups of units:

firstly, 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 ℃, has the precision of +/-1 percent, 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 which is in direct proportion to the pressure of the medium, the resistance value of the sensor changes, then an electronic circuit is used for detecting the change and converting and outputting a standard measurement signal corresponding to the pressure, the power supply voltage is 3.3V, the output voltage is 0.5-2.5V, the corresponding range is 0-6MPa, and the precision is +/-0.5%.

And thirdly, a water content sensing unit, which uses the principle of a waveguide resonance phase method, and crude oil with different water contents generates phase shifts with the change of oil-water ratio due to the difference of dielectric constants (oil is 2.3 and water is 81 at normal temperature) when an electromagnetic wave signal is transmitted to a waveguide resonant cavity taking oil-water mixed liquid as a medium, and finally, a phase change value is detected through a phase difference detector after being modulated through a numerical control phase shifter, and a piecewise linear interpolation function is constructed through a normalized measurement value and an oil-water sample original value, so that the purpose of measuring the water content of the crude oil is finally achieved.

The circuit control processing unit is mainly realized by an embedded 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-containing monitoring waveguide sensing module, the pressure sensor and the temperature sensor.

The auxiliary unit is mainly an instrument body and has a flange structure.

The beneficial effects are that the safety and environmental protection aspects are as follows: the direct contact between staff and toxic and harmful gases such as crude oil, hydrogen sulfide and the like is avoided, and the treatment and discharge of sampling sump oil are reduced (taking 5 ten thousand wells as an example, the annual discharge amount is reduced by about 3000 square); the production cost is as follows: taking a 5-ten-thousand-well scale production unit as an example, the annual labor cost is saved by 1.1 million yuan, and the cost of an assay instrument and a material is 5500 ten thousand yuan; compared with an independent sensor, the cost is saved by about 1 million yuan. The technical innovation aspect is as follows: the multi-sensor fusion mode can realize real-time acquisition of water content, temperature and pressure data, can timely find out the abnormal fluctuation phenomenon of water content, shortens the abnormal water content finding time by 0-20 days compared with the traditional operation mode, and meanwhile, can effectively monitor the wax deposition rule and the hot washing effect of an oil well, and greatly improves the dynamic oil reservoir control efficiency. The water content measurement adopts advanced technologies such as a waveguide resonance phase method, numerical control phase shift and the like, the full-range measurement of 0-100% of water content is realized, the influence of factors such as water-in-oil, oil-in-water, mineralization degree, gas content and the like on the water content measurement is effectively solved, and the measurement precision is improved to +/-3%.

As a further modifiable solution or a parallel solution, this embodiment further preferably provides a specific implementation structure, and similar implementation structures are all within the protection scope of this patent; as shown in fig. 1:

(1) the flange 1 and the stainless steel pipe 2 jointly form an auxiliary unit;

(2) the stainless steel tube 2 and the transmission line 12 jointly form a waveguide resonant cavity;

(3) the first transmission line support 3 and the second transmission line support 11 are connected with a moisture detection module E1 by adopting a radio frequency circuit to jointly form a moisture detection waveguide sensing module for detecting the moisture content in the crude oil;

(6) the sensor cavity shield 4, the water-containing monitoring waveguide sensing module, the pressure sensor 10 and the temperature sensor 11 form a measuring cavity together;

(7) the meter head 5 forms a circuit control processing unit;

(8) the transmission line bracket I3 and the transmission line bracket II 11 are connected with the stainless steel pipe 2 through threads;

(9) the transmission line 12 penetrates through the transmission line bracket I3 and the transmission line bracket II 11 from the center, and high-pressure sealant 8 is filled inside the transmission line 12;

(10) the pressure sensor 9 is connected with the stainless steel pipe 2 by threads and is used for measuring the pressure in the pipeline;

(11) the temperature sensor 10 is bonded with the stainless steel pipe 2 in a surface-mount manner and is used for measuring the temperature in the pipeline;

(13) the moisture detection module E1, the pressure sensor 9 and the temperature sensor 10 are connected with the circuit board 6 by leads;

(14) the transmission line 12 is made of a metal conductor coated with a high-frequency insulating material, and can stably transmit electromagnetic waves, but is highly insulated.

The pressure sensor consists of a fixed thread, a high-pressure joint, a sensing diaphragm, an evaluation circuit and an electrical interface;

the temperature sensor is composed of an integrated chip, a V + pin is a positive power supply, an OUT pin is signal output, and a GND pin is ground;

as shown in fig. 3: water-containing monitoring waveguide sensing module

(1) The transmission line and the stainless steel pipe form a waveguide resonant cavity;

(2) the programmable oscillator, the coupler, the numerical control phase shifter, the phase difference detector and the waveguide resonant cavity jointly form a water-containing detection waveguide sensing module;

as shown in fig. 5: the circuit board consists of a display screen, a serial port module ModBus, a peripheral power circuit, a key combination and a main control module; the water content detection module, the pressure sensor and the temperature sensor are connected with the circuit board through leads.

As a further improvement or a parallel solution, the following further explains the measurement process from various principles; the preferred implementation and implementation structure of the patent; the measurement process comprises the following steps: referring to fig. 1, the multi-parameter measuring instrument for the flange type oil well mouth mainly comprises a flange 1, a stainless steel pipe 2, a first transmission line support 3, a sensor cavity shield 4, an instrument gauge head 5, a circuit board 6, a water-containing detection module E1, high-pressure sealant 8, a pressure sensor 9, a temperature sensor 10, a second transmission line support 11, a transmission line 12 and an oil-water mixture 13.

The temperature sensor 10 is implemented using a high-precision integrated temperature chip, using a non-contact measurement approach.

The pressure sensor 9 adopts a silicon diffusion mode, the pressure of a measured medium directly acts on a diaphragm (stainless steel or ceramic) of the sensor, so that the diaphragm generates micro displacement which is in direct proportion to the pressure of the medium, the resistance value of the sensor is changed, then an electronic circuit is used for detecting the change, and a standard measurement signal corresponding to the pressure is converted and output.

The water content monitoring waveguide sensing module is formed by a water content detection module and a waveguide resonant cavity together, wherein the transmission line 12 and the stainless steel pipe 2 together form the waveguide resonant cavity.

Referring to fig. 2, in the pressure measuring step, oil is in contact with a sensing diaphragm B3 through a high-pressure connector B2, so that the sensing diaphragm B3 is elastically deformed, and an evaluation circuit B4 monitors voltage change caused by deformation, and outputs a pressure signal through an electrical interface B5 after processing.

Referring to fig. 4, in the temperature measuring step, after the circuit board 6 supplies power to the positive electrode V + of the power supply and the negative electrode GND of the power supply of the temperature sensor 10, the power supply voltage is 5V, and the signal output end OUT stably outputs 0-5V signals, which corresponds to the temperature measuring range of-50 ℃ -150 ℃, without calibration.

Referring to fig. 3, the water content measuring step,

the programmable oscillator D1 emits constant frequency electromagnetic waves, which pass through the coupler D2, wherein a high-power high-frequency signal which is directly transmitted to the output end enters one end of a waveguide resonant cavity D5 through which the oil-water mixture 13 flows through a radio frequency transmission line D3, and then enters a phase difference detector D4 through the radio frequency transmission line from the other end of the waveguide resonant cavity D5; wherein, the low-power high-frequency signal at the coupling output end directly enters the numerical control phase shifter D6 and then enters the phase difference detector D4. Due to the large dielectric constant difference of the oil-water mixture, the two signals have different phase differences along with the change of the water content. In order to further improve the water content measurement accuracy, the numerical control phase shifter D6 can modulate the phase difference of the two paths of signals at the optimal detection state of 0-180 degrees or 180-0 degrees, then the phase difference is detected by the phase difference detector D4, and the voltage signals are output to the main control circuit board 6, so that the water content is obtained.

In the fifth embodiment, as a further improvement or a parallel solution, the transmission line 12 is made of a metal conductor plated with a high-frequency insulating material, and can stably transmit electromagnetic waves, but is highly insulated, and can avoid the influence of mineralization on water content measurement. The design herein is effective to serve the basic assays of this patent.

Furthermore, the waveguide resonant cavity is simple and transparent in internal structure, wax and scale are not easy to accumulate and adhere, and the water content measurement precision is effectively improved.

Referring to fig. 5, the circuit board of the present invention mainly includes a display screen E2, a serial module modbus E3, a peripheral power circuit E4, and a key combination E7; the circuit board comprises a main control module E8; the peripheral power supply circuit E4 is used to supply power to the entire circuit board; the serial port module ModBusE3 is connected with the main control module E8 through a UART interface and is used for realizing communication with an upper computer; the display screen E2 is connected with the main control module E8 through a bus interface and is used for displaying measured values of water content, temperature and pressure; the key combination E7 is connected with the main control module E8 through an IO interface and is used for setting instrument parameters; the moisture content detection module E1 is connected to the A/D interface of the main control module E8 through a lead and is used for measuring the moisture content; the pressure sensing module E5 is connected to the A/D interface of the main control module E8 through a lead and is used for measuring the pressure of a well head; the temperature sensing module E6 is connected to the A/D interface of the main control module E8 through a lead, and is used for measuring the oil temperature and compensating the water content.

Sixth embodiment, as a further modifiable or parallel solution, in addition to the above basic physical connection, the present embodiment provides detailed data processing methods, which can scientifically obtain the final data required by the present patent. And (3) data calculation processing:

the patent of the utility model also provides a temperature, pressure and the moisture measuring method of oil well head multi-parameter measuring apparatu, including following step:

firstly, in the power supply mode of the multi-parameter instrument, calibration is needed to be carried out on 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 percent is recorded, in a mixed solution containing 10 percent of water, the phase difference P (2) when the water content is 10 percent is recorded, in a mixed solution containing 20 percent of water, the phase difference P (3) when the water content is 20 percent is recorded, and the like, the phase difference P (11) when the water content is 100 percent 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;

And (3) installation and use:

referring to fig. 6, the utility model discloses a flange formula well head multi-parameter measuring apparatu field installation schematic diagram. The multi-parameter measuring instrument is installed on a wellhead oil outlet pipeline, and installation can be completed by welding two flanges on parallel sections, namely transverse pipelines, of a Christmas tree. During installation, the pumping unit is stopped, the oil pressure gate and the back pressure gate are closed, the emptying gate is opened, and the oil pumping unit can be installed after emptying.

Creatively, the above effects exist independently, and the combination of the above results can be completed by a set of structure.

The technical effect that above structure was realized realizes clearly, if do not consider additional technical scheme, this patent name can also be a novel well logging mounting structure. Some details are not shown in the figures.

It should be noted that the plurality of schemes provided in this patent include their own basic schemes, which are independent of each other and are not restricted to each other, but they may be combined with each other without conflict, so as to achieve a plurality of effects.

Example seven, as a further development or juxtaposition, as an optional extension: this section makes primary reference to the last three figures; the remaining figures are omitted. The patent also discloses an attached terminal operation method. The method is preferably as follows: in this example, the mineralization and the water content can be measured by two independent systems, which can be implemented independently.

The continuous online measurement of the water content, the temperature and the pressure of crude oil at the wellhead of the oil well is completed, and the electromagnetic wave method is mainly adopted for the multi-parameter measurement of the wellhead. A handshake mechanism is established between the crude oil wellhead multi-parameter measuring instrument and the crude oil wellhead multi-parameter measuring instrument system, water content curve data, pressure data, temperature data and measuring time are packaged by a ModBus protocol, sent out and transmitted back to the crude oil wellhead multi-parameter measuring instrument system in real time, and the software can also finish storage, analysis processing and playback of the measured data.

The following provides a separate preferred embodiment which can be combined with all of the above.

1. The system for measuring the water content and/or the mineralization degree through fusion of multiple sensors is characterized in that the output of a programmable oscillator X1 is connected to a multi-channel signal distributor X2, a multi-channel signal distributor X2 is in communication connection with a coupler X5, a coupler X5 is in communication connection with a numerical control phase shifter X6, and a numerical control phase shifter X6 is in communication connection with a phase difference detector X7;

the output of the programmable oscillator X1 is connected to a multi-channel signal distributor X2 to generate multi-channel same-frequency same-amplitude same-phase high-frequency signals;

firstly, taking one path of high-frequency signal to enter a coupler X5, outputting two paths of signals, directly entering the signal with higher power from one end of a water-containing guided wave transmission line X17 of a double-waveguide resonant cavity X15, outputting the other end of the signal to a phase difference detector X7, directly passing the signal with lower power through a numerical control phase shifter X6, then entering a phase difference detector X7, and obtaining the water content by measuring the phase difference of the two paths of signals to be a water content measuring part; the water content measuring section can be realized separately.

And secondly, another two high-frequency signals are taken, one of the two high-frequency signals directly enters from one end of a mineralization degree guided wave transmission line X18 of the double-waveguide resonant cavity X15, the other end of the two high-frequency signals is output to an amplitude difference detector X3, the other high-frequency signal of the two high-frequency signals directly enters an amplitude difference detector X3, and the mineralization degree is obtained by measuring the amplitude difference of the two high-frequency signals, so that the mineralization degree measuring part is provided. The mineralization measuring part can also be realized separately.

In an eighth embodiment, as a further improvement or a parallel arrangement, the water content determining portion and the mineralization determining portion both form a dual-waveguide resonator X15, the dual-waveguide resonator X15 includes a metal housing X14, the metal housing X14 includes a first water guided-wave transmission line support X8, a first mineralization guided-wave transmission line support X9, a second mineralization guided-wave transmission line support X10, and a second water guided-wave transmission line support X11; the first water-containing guided wave transmission line bracket X8 and the second water-containing guided wave transmission line bracket X11 form a water-containing guided wave transmission line bracket; the mineralization degree guided wave transmission line bracket I X9 and the mineralization degree guided wave transmission line bracket II X10 form a mineralization degree guided wave transmission line bracket; the water-containing guided wave transmission line X17 passes through the water guided wave transmission line bracket, and the mineralization guided wave transmission line X18 passes through the mineralization guided wave transmission line bracket; the metal shell is filled with an oil-water mixture X16. The embodiments herein show specific physical implementation structures, and similar implementation structures are all within the scope of protection of the patent.

3. The metal shell X14 also comprises a pressure sensor X12 and/or a temperature sensor X13.

4. The water-containing guided wave transmission line X17 is formed by wrapping an insulating material outside a metal conductor, the insulating material is highly insulating, but does not influence electromagnetic wave transmission, and the influence of mineralization on water-containing measurement can be avoided.

5. The mineralization degree guided wave transmission line X18 is composed of a metal conductor.

6. The water-containing guided wave transmission line X17 passes through the water-containing guided wave transmission line bracket X8 and the water-containing guided wave transmission line bracket X11, and the inner gap is filled with high-pressure sealant or sealed by a sealing ring; the mineralization degree guided wave transmission line X18 passes through the mineralization degree guided wave transmission line bracket X9 and the mineralization degree guided wave transmission line bracket X10, and the inner gap is filled with high-pressure sealant or sealed by a sealing ring.

7. The pressure sensor X12 and/or the temperature sensor X13 are connected to the metal housing X14 by screws.

8. A system for measuring water content and/or mineralization degree by multi-sensor fusion is characterized in that,

the output of the programmable oscillator X1 is connected to a multipath signal distributor X2, a multipath signal distributor X2 is in communication connection with a coupler X5, a coupler X5 is in communication connection with a numerical control phase shifter X6, and a numerical control phase shifter X6 is in communication connection with a phase difference detector X7;

firstly, taking one path of high-frequency signal to enter a coupler X5, outputting two paths of signals, directly entering the signal with higher power from one end of a water-containing guided wave transmission line X17 of a double-waveguide resonant cavity X15, outputting the other end of the signal to a phase difference detector X7, directly passing the signal with lower power through a numerical control phase shifter X6, then entering a phase difference detector X7, and obtaining the water content by measuring the phase difference of the two paths of signals to be a water content measuring part;

and secondly, another two high-frequency signals are taken, one of the two high-frequency signals directly enters from one end of a mineralization degree guided wave transmission line X18 of the double-waveguide resonant cavity X15, the other end of the two high-frequency signals is output to an amplitude difference detector X3, the other high-frequency signal of the two high-frequency signals directly enters an amplitude difference detector X3, and the mineralization degree is obtained by measuring the amplitude difference of the two high-frequency signals, so that the mineralization degree measuring part is provided.

9. The water content measuring part and the mineralization measuring part form a double-waveguide resonant cavity X15, the double-waveguide resonant cavity X15 comprises a metal shell X14, and the metal shell X14 comprises a water-containing guided wave transmission line bracket I X8, a mineralization guided wave transmission line bracket I X9, a mineralization guided wave transmission line bracket II X10 and a water-containing guided wave transmission line bracket II X11; the first water-containing guided wave transmission line bracket X8 and the second water-containing guided wave transmission line bracket X11 form a water-containing guided wave transmission line bracket; the mineralization degree guided wave transmission line bracket I X9 and the mineralization degree guided wave transmission line bracket II X10 form a mineralization degree guided wave transmission line bracket; the water-containing guided wave transmission line X17 passes through the water guided wave transmission line bracket, and the mineralization guided wave transmission line X18 passes through the mineralization guided wave transmission line bracket; the metal shell is filled with an oil-water mixture X16.

10. The metal shell X14 also comprises a pressure sensor X12 and/or a temperature sensor X13.

11. The water-containing guided wave transmission line X17 is formed by wrapping an insulating material outside a metal conductor, the insulating material is highly insulating, but does not influence electromagnetic wave transmission, and the influence of mineralization on water-containing measurement can be avoided.

12. The mineralization degree guided wave transmission line X18 is composed of a metal conductor.

13. The water-containing guided wave transmission line X17 passes through the water-containing guided wave transmission line bracket X8 and the water-containing guided wave transmission line bracket X11, and the inner gap is filled with high-pressure sealant or sealed by a sealing ring; the mineralization degree guided wave transmission line X18 passes through the mineralization degree guided wave transmission line bracket X9 and the mineralization degree guided wave transmission line bracket X10, and the inner gap is filled with high-pressure sealant or sealed by a sealing ring.

14. The pressure sensor X12 and/or the temperature sensor X13 are connected to the metal housing X14 by screws.

Example nine, as a further development or in parallel, a method for determining whether a pipe is leaking, characterized in that the pipe is run into a steady state, the sampling frequency is 1HZ, a pressure sequence p (n) with n data is selected over a period of time, the mean μ and the variance σ are calculated²Assuming that the acceptable false alarm rate α and the false alarm rate β exist, the sequential probability ratio check limit value A is equal to ln (β/(1- α)) and B is equal to ln ((1- β)/α), then assuming that the deviation amount is △ mu under the mean value after leakage, and executing the sequential probability ratio algorithm once every time a new value is acquired;

then the probability ratio:

if:

if lambda (n) is more than or equal to B, the pipeline leaks;

if:

if lambda (n) is less than or equal to A, the pipeline operates normally;

if:

a < lambda (n) < B, further examination is required.

The utility model discloses a technical scheme who adopts is: the principle of the measuring system is that a multi-sensor fusion method is adopted, water content, mineralization degree, temperature and pressure sensing units are effectively integrated, and the system mainly comprises a water content sensor, a mineralization degree sensor, a pressure sensor, a temperature sensor and a main control circuit.

Firstly, in the aspect of the temperature measurement, adopt non-contact or contact measurement mode, use thermal resistance, integrated temperature chip or thermocouple directly to convert temperature signal into the signal of telecommunication, export AD acquisition circuit.

In the aspect of pressure measurement, piezoelectric type, piezoresistive type, capacitance type, electromagnetic type and other technologies are adopted to convert pressure changes into electric signal changes, and the electric signal changes are output to an AD acquisition circuit.

Thirdly, in the aspect of water content measurement, a waveguide resonance phase measurement technology is used, and due to the difference of dielectric constants (oil is 2.3 and water is 81 at normal temperature) of crude oil with different water contents, when an electromagnetic wave signal is transmitted to a waveguide resonant cavity taking oil-water mixed liquid as a medium, the signal phase is greatly changed along with the difference of oil-water components, so that the water content parameter of the crude oil can be obtained by measuring the phase change of the signal.

And fourthly, in the aspect of mineralization measurement, a waveguide resonance amplitude measurement technology is used, and crude oil with different water contents presents different characteristic impedances due to the difference of the mineralization. When an electromagnetic wave signal is transmitted to a waveguide resonant cavity taking oil-water mixed liquid as a medium, the amplitude of the signal is greatly changed along with the difference of oil-water components, so that the crude oil mineralization degree parameter can be obtained by measuring the amplitude change of the signal.

The main control circuit unit is mainly realized by an embedded system, and physical property parameters such as the water content, the mineralization degree, the pressure, the temperature and the like of the crude oil are finally obtained by carrying out real-time AD acquisition processing on signals of the water content sensor, the mineralization degree sensor, the pressure sensor and the temperature sensor and carrying out related algorithm processing.

Firstly, the multi-sensor fusion mode not only fills the blank of on-line testing of the water content and the mineralization degree of the crude oil and data transmission, but also realizes the comprehensive and accurate measurement of the temperature, the pressure, the water content and the mineralization degree of the crude oil. In the actual measurement process, all parameters are mutually influenced, and the measurement method of the independent sensor cannot realize accurate measurement, so that multiple sensors are integrated, the relation of mutual influence of all physical properties of crude oil is explored, and the measurement precision of an instrument can be improved.

Secondly, the method completely gets rid of the manual measurement mode, and the original mode of only measuring water content, pressure and temperature still needs manual field sampling and mineralization degree test. A complete set of measuring system is formed, in the aspect of water content measurement, the full-range measurement of 0% -100% of water content is realized, the influence of factors such as water-in-oil, oil-in-water, mineralization degree and gas content on the water content measurement is effectively solved, and the measuring precision is +/-3%; in the aspect of mineralization measurement, the range is 0-200000mg/L, and the measurement precision is +/-100 mg/L; in the aspect of temperature measurement, the measuring range is-50-150 ℃, and the measurement precision is +/-0.25 ℃; in the aspect of pressure measurement, the measuring range is 0-6MPa, and the measuring precision is +/-0.5%.

And thirdly, the industrial blank is filled, the production and operation cost of the oil field is greatly reduced, the daily production management level of the oil field is effectively improved, and the digitization and intelligence level of the oil field is promoted. Meanwhile, the problems of pollution oil discharge, hazardous chemical management and other safety environmental protection caused by traditional manual chemical examination are solved.

Finally, online measurement of water content can timely find the production change of the oil well, timely give an instructive exploitation scheme and well carry out stable production and production-up work; the mineralization degree is measured on line, and the condition of disastrous stratum damage such as water logging, stratum string and the like can be found in time; the temperature is measured on line, the wax deposition condition of the oil well can be found in time, and the hot washing operation effect of the oil well can be monitored; the pressure is measured on line, the oil transportation state of the pipeline can be reflected in time, leakage can be found, and the hot washing and medicine adding effect can be monitored.

As shown in fig. 9:

(1) the metal shell X14, the water-containing guided wave transmission line X17, the water-containing guided wave transmission line bracket X8, the water-containing guided wave transmission line bracket X11, the mineralization degree guided wave transmission line X18, the mineralization degree guided wave transmission line bracket X9 and the mineralization degree guided wave transmission line bracket X10 jointly form a double-wave guide resonant cavity X15;

(2) the water-containing guided wave transmission line X17 is formed by wrapping an insulating material outside a metal conductor, the insulating material is highly insulating, but does not influence electromagnetic wave transmission, and the influence of mineralization on water-containing measurement can be avoided;

(3) the mineralization degree guided wave transmission line X18 is composed of a metal conductor;

(4) the water-containing guided wave transmission line bracket X8, the water-containing guided wave transmission line bracket X11, the mineralization guided wave transmission line bracket X9 and the mineralization guided wave transmission line bracket X10 are integrally connected with the metal shell X14;

(5) the water-containing guided wave transmission line X17 passes through the water-containing guided wave transmission line bracket X8 and the water-containing guided wave transmission line bracket X11, and the inner gap is filled with high-pressure sealant or sealed by a sealing ring;

(6) the mineralization degree guided wave transmission line X18 passes through the mineralization degree guided wave transmission line bracket X9 and the mineralization degree guided wave transmission line bracket X10, and the inner gap is filled with high-pressure sealant or sealed by a sealing ring;

(7) the pressure sensor X12 is connected with the metal shell X14 through threads;

(8) the temperature sensor X13 is connected with the metal shell X14 through threads or a label mode;

note: the scheme attached drawing of the utility model is the measurement system sketch map, does not limit its structure, and its shape and mounted position are not limited to water-bearing guided wave transmission line X17, mineralization degree guided wave transmission line X18, but all adopt such technical scheme, all belong to the same replacement of thunder.

The measuring method comprises the following steps:

referring to fig. 1, a crude oil physical property measurement system mainly includes a programmable oscillator X1, a multi-channel signal distributor X2, an amplitude difference detector X3, a main control circuit board X4, a coupler X5, a numerical control phase shifter X6, a phase difference detector X7, a water-containing guided wave transmission line support X8, a mineralization guided wave transmission line support X9, a mineralization guided wave transmission line support X10, a water-containing guided wave transmission line support X11, a pressure sensor X12, a temperature sensor X13, a metal shell X14, a dual-waveguide resonant cavity X15, an oil-water mixture X16, a water-containing guided wave transmission line X17, and a mineralization guided wave transmission line X18.

Firstly, in the aspect of the temperature measurement, temperature sensor X13 adopts non-contact or contact measurement mode, uses thermal resistance or thermocouple directly to convert temperature signal into the signal of telecommunication, exports AD acquisition circuit.

In the aspect of pressure measurement, the pressure sensor X12 adopts piezoelectric, piezoresistive, capacitive, electromagnetic and other technologies to convert pressure changes into electrical signal changes, and the electrical signal changes are output to the AD acquisition circuit.

And thirdly, in the aspect of measuring the water content and the mineralization degree, the output of the programmable oscillator X1 is connected to a multi-channel signal distributor X2 to generate multi-channel same-frequency same-amplitude same-phase high-frequency signals. Firstly, taking one path of high-frequency signal to enter a coupler X5, outputting two paths of signals, directly entering the signal with higher power from one end of a water-containing guided wave transmission line X17 of a double-waveguide resonant cavity X15, outputting the other end of the signal to a phase difference detector X7, directly passing the signal with lower power through a numerical control phase shifter X6, then entering a phase difference detector X7, and obtaining the water content by measuring the phase difference of the two paths of signals; and secondly, taking another two paths of high-frequency signals, wherein one path of high-frequency signals directly enters from one end of a mineralization degree guided wave transmission line X18 of the double-waveguide resonant cavity X15, the other end of the high-frequency signals is output to an amplitude difference detector X3, the other path of high-frequency signals directly enters an amplitude difference detector X3, and the mineralization degree is obtained by measuring the amplitude difference of the two paths of signals.

And (3) measurement algorithm: (combining FIGS. 10 and 11)

1. And (3) measuring the water content:

considering season change, generally speaking, the crude oil is not easy to be connected with wax in summer, the crude oil is easy to be waxed in winter, and the four-season waxing rule of the crude oil is found through a large number of experiments, and the water content measured value is further compensated according to the time change. The specific implementation mode is as follows:

the control system firstly acquires the current time, then acquires which ten days in the year, and then inquires the influence table of wax precipitation on the water content of the memory chip of the embedded control system, and the water content measured value is added with the corresponding influence compensation value, thus obtaining the real water content. Examples are as follows: in the last 10 months, the influence of wax deposition on the water content is 6%, and the water content is measured to be 65% in the last 10 months, so that the real water content is 71%.

2. And (3) mineralization degree measurement aspect:

according to the theory of electromagnetism, the water content in crude oil and the salt ion concentration (true mineralization degree) both cause the amplitude attenuation of electromagnetic wave transmission, so the mineralization degree is measured by adopting an amplitude attenuation mode, and the influence of the water content needs to be considered. In the actual measurement process, the influence of water content on the mineralization degree measurement is obtained through an experimental mode, and then the influence on the mineralization degree measurement is eliminated according to the actually measured water content value.

The specific implementation mode is as follows:

the control system firstly obtains the real water content, then obtains the influence table of the water content on the mineralization degree measurement of the memory chip of the inquiry implantation control system, and the real mineralization degree value is obtained by subtracting the corresponding influence compensation value from the real mineralization degree measured value. Examples are as follows: the water content is 10 percent, the influence on the mineralization degree is 500mg/L, the actually measured mineralization degree is 10500mg/L, and then the actual mineralization degree is 10000 mg/L.

3. In the aspect of pressure measurement, the pipeline leakage can be found in time by adopting a sequential probability ratio algorithm. The specific algorithm is as follows:

the pipeline is operated to enter a steady state, the sampling frequency is 1HZ, at this time, a pressure sequence P (n) with n data in a period of time is selected, and the mean value mu and the variance sigma of the pressure sequence P (n) are calculated²Assuming an acceptable false alarm rate α and a false alarm rate β, the sequential probability ratio check limit a ═ ln (β/(1- α)) and B ═ ln ((1- β)/α) can be obtained, and then assuming that the deviation amount △ μ is found in the mean value after the leakage.

Then the probability ratio:

if:

if lambda (n) is more than or equal to B, the pipeline leaks;

if:

if lambda (n) is less than or equal to A, the pipeline operates normally;

if:

a < lambda (n) < B, further examination is required.

4. In the aspect of temperature measurement, a weighted average mode is adopted to measure more accurate temperature. The specific implementation mode is as follows:

T＝(T1+T2+…+Tn)/n

the N temperature data move circularly, newly acquired temperature data are added, the first temperature data of the data sequence are removed, and the cyclic shift weighting averaging function is realized.

The following are methods for functional implementation:

starting software: and double clicking the desktop shortcut connection icon of the crude oil wellhead multi-parameter measuring instrument software system on the desktop, and starting and operating the measuring system software. After the interface is started, the system pops up a user login dialog box, and after a user inputs a user name and a password in the dialog box, the user clicks a confirmation button to finish login. If the login information is correct, entering a main interface of the measurement system; if the login information is wrong, the software is quitted.

Main interface of the measuring instrument system:

after the system is started and the user login is completed. By clicking on a command button on the left side of the main interface of the system, the main functions of the measurement system can be accessed. The command buttons are, from top to bottom, start monitoring, stop monitoring, exit from the system, system parameters, user management, password change, well information, event review, data cleanup, and system information. The user clicks a system quitting button to quit the system software; clicking other buttons switches to the corresponding function operation interface.

Starting and stopping monitoring: the user can control the start and stop of the measurement operation by clicking the 'start monitoring' and 'stop monitoring' buttons. After clicking 'start monitoring', the system can check the software state installed by the local machine, including whether a database is installed or not and whether the database connection is normal or not, and can also check all serial port information of the local machine at the same time, and start to read back the data of the lower computer by using a serial port thread. After clicking 'stop monitoring', the system closes all serial port threads and stops measurement.

Clicking the "system parameters" button on the main interface opens a system configuration dialog. In the dialog box, the system database connection information is mainly configured. The number of polled tasks is configured at the same time. After the user clicks the 'confirm' button, the system will operate according to the configuration parameters modified by the user; if the user clicks the cancel button, the system will ignore the configuration modification this time.

User management and password change

After the user clicks the "user manage" button, a user management dialog box will be displayed. The functions of adding users, deleting users, modifying users and the like can be realized on the interface, and the user management interface can be quitted by clicking a quit button.

After clicking the 'add user' button, the user displays an add user dialog box, and the user authority is divided into an operator and an administrator.

After the user clicks the "delete user" button, a delete user dialog box will be displayed.

After the user clicks the "modify user" button, a modify user dialog box will be displayed.

After the user clicks the "password change" button, a password change dialog will be displayed. The password changing function of the added user can be realized on the interface, the login operation is carried out according to the new password by clicking the 'modification' button, and the password changing interface can be quitted by clicking the 'cancel' button.

Oil well information

After the user clicks the "well information" button in the main interface, a well information maintenance interface is popped up, as shown in fig. 8. The user can realize the maintenance of the oil well information by clicking the oil well information configuration button on the right side, the maintenance contents comprise the information of the home relationship of the oil well, the COM port of the oil well, the baud rate, the verification mode and the like, the smoothness of a data link is ensured, and the timely and accurate data return is ensured. The configuration interface has the functions of importing and exporting, and can realize the rapid management of oil well information. Clicking on the return to home interface may return to the measurement interface.

The optional operations are as follows: the method comprises the steps that a user adds an oil production plant operation, the user modifies the oil production plant operation, the user deletes the oil production plant operation, the user adds an operation area operation, the user modifies the operation area operation, the user deletes the operation area operation, the user adds a site operation, the user modifies the site operation, the user deletes the site operation, the user adds a well site operation, the well site name needs to be input, the communication port number, the baud rate, the check bit, the flow control and the like, the user modifies the well site operation, the user deletes the well site operation, the user adds an oil well operation, the user modifies the oil well operation, the user deletes the oil well operation, and the user exports an oil well information operation which. And (4) importing the oil well information operation by a user, wherein the import is an xml file.

And (3) event viewing:

after the user clicks the "event view" button, an event view interface will be displayed. The interface mainly can be used for checking recent events and past events and switching and checking through the option card. The latest event refers to the 50 events which occur most recently, and the past event refers to the event in a period of event through setting the query event. Events mainly comprise two major types, namely data reading success and data reading failure. The crude oil wellhead multi-parameter measuring instrument can be better managed to be installed on site.

Data cleaning: clicking on "data clean" by the user will display a data clean interface. The interface can finish the cleaning work of historical data and historical events, and the cleaning mode mainly comprises two modes, namely cleaning according to time periods and cleaning according to expiration dates.

Generally speaking, this patent can realize the accurate measurement and the data teletransmission of single-well's crude oil moisture content, temperature, pressure simultaneously. The problems that the existing water content measurement precision is poor, a temperature sensor is not installed, a pressure sensor cannot remotely transmit and the like are solved, reliable data are provided for crude oil production, the production cost and the labor intensity of field workers are reduced, and the digital management level of an intelligent oil field is improved.

Specific comparison of this patent with the prior art is provided below:

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

1. A multi-parameter measuring instrument for a flange type oil production well mouth is characterized in that an installation structure comprises a stainless steel pipe (2) at the lower part, flanges (1) are arranged at two sides of the stainless steel pipe (2), a sensor cavity shield (4) is arranged on the stainless steel pipe, the sensor cavity shield (4) and the stainless steel pipe (2) are integrally connected, more than one sensor is arranged in the sensor cavity shield (4), and the series of sensors are in communication connection with an instrument gauge head (5) at the upper part; the output of the sensor cavity shield (4) is connected with a vertical shaft with external threads, an instrument gauge head (5) is arranged on the vertical shaft with the external threads, and the circuit of more than one sensor passes through the hollow part of the vertical shaft with the threads to be connected with a circuit board (6) in the gauge head.

2. A flanged oil recovery wellhead multiparameter gauge as defined in claim 1, wherein the sensor is a sensor module comprising one or more of the following: the device comprises a pressure sensor (9), a temperature sensor (10) and a water-containing monitoring waveguide sensing module; the moisture monitoring waveguide sensing module comprises a moisture detection module (E1) and a waveguide resonant cavity, wherein the moisture detection module (E1) is connected with the waveguide resonant cavity by adopting a radio frequency wire to jointly form the moisture monitoring waveguide sensing module.

3. A multi-parameter measuring instrument for a flange-type producing well head according to claim 2, characterized in that the flange (1) and the stainless steel pipe (2) together form an auxiliary unit; the stainless steel tube (2) and the transmission line (12) jointly form a waveguide resonant cavity; the sensor cavity shield (4), the water content monitoring waveguide sensing module, the pressure sensor (9) and the temperature sensor (10) jointly form a measuring cavity; the meter head (5) forms a circuit control processing unit; the transmission line bracket I (3) and the transmission line bracket II (11) are connected with the stainless steel pipe (2) through threads; the transmission line (12) penetrates through the first transmission line support (3) and the second transmission line support (11) from the center, and high-pressure sealant (8) is filled in the peripheries of the transmission lines in the first transmission line support (3) and the second transmission line support (11); the pressure sensor (9) is connected with the stainless steel pipe (2) in a threaded manner and can be used for measuring the pressure in the pipeline; the temperature sensor (10) and the stainless steel pipe (2) are bonded in a surface-mounted mode and can be used for measuring the temperature in a pipeline; the circuit board (6) is arranged in the meter head (5); the moisture detection module (E1), the pressure sensor (9) and the temperature sensor (10) are connected with the circuit board (6) by leads and signal wires; the transmission line (12) is made of a metal conductor coated with a high-frequency insulating material which can stably transmit electromagnetic waves but is highly insulating.

4. A multi-parameter measuring instrument for a wellhead of a flange-type oil production well as claimed in claim 3, characterized in that the circuit board is further communicatively connected with a display screen (E2), a serial module ModBus (E3), a peripheral power circuit (E4) and a key combination (E7); the circuit board comprises a main control module (E8); the peripheral power supply circuit (E4) is used for supplying power to the whole circuit board; the serial port module ModBus (E3) is connected with the main control module (E8) through a UART interface and is used for realizing communication with an upper computer; the display screen (E2) is connected with the main control module (E8) through a bus interface and is used for displaying measured values of water content, temperature and pressure; the key combination (E7) is connected with the main control module (E8) through an IO interface and is used for setting instrument parameters; the moisture detection module (E1) is connected to the A/D interface of the main control module (E8) through a lead and is used for measuring the moisture content; the pressure sensing module (E5) is connected to the A/D interface of the main control module (E8) through a lead and is used for measuring the pressure of the wellhead; the temperature sensing module (E6) is connected to the A/D interface of the main control module (E8) through a lead and is used for measuring the oil temperature and compensating the water content.

5. The multi-parameter measuring instrument for the wellhead of the flange-type oil production well as claimed in claim 4, wherein the flange is installed in a transverse pipeline, the left side of the transverse pipeline is connected with a production well pipeline, an oil pressure gate (C1) is arranged on the transverse pipeline, the right side of the transverse pipeline is connected with a vertical pipeline, the connecting position of the transverse pipeline and the vertical pipeline comprises a vent gate (C2), and the vertical pipeline comprises a back pressure gate (C3).