Wireless flow monitoring device

Abstract

The invention relates to the technical field of petroleum drilling ground testing instruments, in particular to a wireless flow monitoring device. Comprising a flow monitoring body; a plurality of liquid level measuring sensors are arranged on the side wall of the main body along the circumferential surface, and at least one liquid level measuring sensor is arranged at the top position in the flow monitoring main body; a flow velocity measurement sensor is arranged at the bottom in the flow monitoring main body; a signal analysis wireless transmitter used for determining the real-time flow in the main body according to signals measured by the liquid level measuring sensor and the flow velocity measuring sensor and sending the real-time flow to an upper computer is arranged above the flow monitoring device; the flow monitoring device is internally provided with a self-power-generating mechanism which carries out self power generation through fluid flowing and supplies power to the liquid level measuring sensor, the flow speed measuring sensor and the signal analysis wireless transmitter. The problem that overflow cannot be found in time due to the fact that a full-pipe flowmeter is adopted when the flow in a pipeline is monitored at present and metering is inaccurate when the pipeline is not full of fluid is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oil drilling ground testing instruments, and particularly relates to a wireless flow monitoring device. BACKGROUND

[0002] Shale oil formations have developed fractures, good connectivity, reservoir associated gas development, high formation pressure, and many technical problems such as high leakage risk and low time efficiency in the drilling and completion process, which restricts the speed, efficiency and quality of shale oil drilling under complex geological conditions. At present, mud tank liquid level or manual density measurement is mainly used to predict overflow, and the accuracy of the two prediction methods is low, and when the overflow is found, the overflow has occurred for a long time.

[0003] The liquid flow in the pipeline can be monitored by the flow monitoring device to predict whether overflow will occur, but the flow meter in the commonly used flow monitoring device is a full pipe flow meter. The flow monitoring device is not accurate when the internal fluid is not full, which leads to the inability to discover the overflow in time. At the same time, the flow meter needs a special power supply module for power supply and a data line to transmit the signal to the monitor. SUMMARY

[0004] The present application provides a wireless flow monitoring device to solve the problem that the full pipe flow meter used to monitor the flow in the pipeline is not accurate when the fluid is not full, which leads to the inability to discover the overflow in time.

[0005] According to one aspect of the present application, a wireless flow monitoring device is provided, comprising: a flow monitoring body;

[0006] The flow monitoring body is horizontally arranged, one end of which is a flow inlet and the other end is a flow outlet;

[0007] A plurality of liquid level measurement sensors are arranged on the side wall of the flow monitoring body along the circumference, and at least one liquid level measurement sensor is arranged at the top of the flow monitoring body;

[0008] A flow rate measurement sensor is arranged at the bottom of the flow monitoring body;

[0009] A signal analysis wireless transmitter for determining the real-time flow in the body according to the signals measured by the liquid level measurement sensor and the flow rate measurement sensor and sending the signals to the upper computer is arranged above the flow monitoring device;

[0010] The flow monitoring device is internally provided with a self-power generation mechanism for generating power by fluid flow and supplying power to the liquid level measurement sensor, the flow rate measurement sensor and the signal analysis wireless transmitter.

[0011] Preferably, the liquid level measuring sensor is a laser sensor.

[0012] The number of the liquid level measuring sensors is at least 8, which are evenly distributed on the side wall of the flow monitoring body.

[0013] Preferably, the distance value between the top of the flow monitoring body and the fluid level below is measured by the liquid level measuring sensor arranged at the top of the flow monitoring body.

[0014] According to the distance value, the liquid flow through the flow monitoring body is determined by a formula:

[0015] Q=S*V.

[0016] Wherein,

[0017]

[0018] In the formula, Q is the flow, V is the flow rate value measured by the flow rate measuring sensor, D is the distance value between the top of the flow monitoring body and the fluid level below, r is the radius of the flow monitoring body, and y is the distance between the bottom of the flow monitoring body and the fluid level.

[0019] Preferably, in addition to the liquid level measuring sensor arranged at the top of the flow monitoring body, the measurement result of the liquid level measuring sensor at the top is verified by other liquid level measuring sensors, which specifically includes:

[0020] Determining the verification liquid level value corresponding to each liquid level measuring sensor, which is the distance between the position of the liquid level measuring sensor and the top of the flow monitoring body;

[0021] Judging whether the verification liquid level value corresponding to the liquid level measuring sensor is equal to the measurement value of the liquid level measuring sensor at the top or the difference between them is within a predetermined range when the measurement value of the other liquid level measuring sensors is 0, except for the liquid level measuring sensor at the top. If yes, the measurement value of the liquid level measuring sensor at the top is accurate, otherwise, it is inaccurate.

[0022] Preferably, the signal analysis wireless transmitter includes a signal analysis conversion circuit, a wireless transmitting antenna, and a circuit protection bin.

[0023] The signal analysis conversion circuit is connected to the liquid level measuring sensor and the flow rate measuring sensor.

[0024] The signal analysis conversion circuit is connected with the wireless transmitting antenna, and is used for converting analog signals measured by the liquid level measuring sensor and the flow rate measuring sensor into digital signals and then transmitting the digital signals to an upper computer through the wireless transmitting antenna.

[0025] The signal analysis conversion circuit is mounted inside the circuit protection bin.

[0026] Preferably, the self-power generation mechanism comprises: an impeller, a rotating rod and a power generator.

[0027] The rotating rod is vertically mounted inside the flow monitoring body and can rotate along an axis, the top of the rotating rod is connected with the power generator, and the impeller is sleeved on the rotating rod.

[0028] The power generator is connected with the liquid level measuring sensor, the flow rate measuring sensor and the signal analysis wireless transmitter respectively.

[0029] Preferably, the flow monitoring body is externally sleeved with a sensor protection shell, and the liquid level measuring sensor is arranged inside the sensor protection shell.

[0030] The sensor protection shell is filled with heat preservation asbestos for heat preservation of the liquid level measuring sensor and the flow rate measuring sensor.

[0031] Preferably, a polyurethane coating for preventing the inner wall of the flow monitoring body from being corroded is arranged on the inner wall of the flow monitoring body.

[0032] Preferably, the liquid level measuring sensor and the flow rate measuring sensor are wrapped with an aluminum foil shielding layer.

[0033] The probe part of the liquid level measuring sensor and the flow rate measuring sensor has a WC coating.

[0034] Preferably, the two ends of the flow monitoring body are connected with wellhead pipelines through flanges respectively.

[0035] The present application has at least the following beneficial effects:

[0036] The present application provides a wireless flow monitoring device, which can detect the liquid level of fluid in a pipeline through multiple liquid level sensors and can accurately monitor the flow of non-full-pipe returning and outputting drilling fluid at the wellhead. The self-power generation mechanism is arranged to supply power, and the signal analysis wireless transmitter is arranged to transmit signals, so that the device is more energy-saving and convenient to install and use without additional power supply module and signal transmission line. BRIEF DESCRIPTION OF DRAWINGS

[0037] The accompanying drawings, which are incorporated herein and constitute part of this specification, illustrate embodiments consistent with the application, and together with the description, serve to explain the principles of the application.

[0038] Figure 1 Fig. 1 shows a front view of a wireless flow monitoring device according to an embodiment of the present application;

[0039] Figure 2 Fig. 2 shows a perspective view of a wireless flow monitoring device according to an embodiment of the present application; Figure 1 Fig. 3 shows a sectional view along B-B of Fig. 2;

[0040] Figure 3 Fig. 4 shows a left view of a wireless flow monitoring device according to an embodiment of the present application;

[0041] Figure 4 Fig. 5 shows a perspective view of a wireless flow monitoring device according to an embodiment of the present application; Figure 1 Fig. 6 shows a sectional view along A-A of Fig. 5;

[0042] Figure 5 Fig. 7 shows a structural schematic diagram of a liquid level measuring sensor according to an embodiment of the present application;

[0043] Figure 6 Fig. 8 shows an enlarged view of I in Fig. 7 according to an embodiment of the present application; Figure 1 Fig. 9 shows a structural schematic diagram of an impeller according to an embodiment of the present application.

[0044] Figure 7 Fig. 10 shows a structural schematic diagram of an impeller according to an embodiment of the present application.

[0045] In the drawings, 1 - flow monitoring body, 2 - sensor protection shell, 3 - signal analysis conversion circuit, 4 - circuit protection bin, 5 - wireless transmitting antenna, 6 - energy storage battery, 7 - generator, 8 - rotating rod, 9 - impeller, 10 - flow rate measuring sensor, 11 - sealing ring, 12 - liquid level measuring sensor, 13 - flange. DETAILED DESCRIPTION

[0046] Various illustrative embodiments, features and aspects of the application are described below in detail. The same numbers are used in different drawings to identify the same or similar components. Embodiments will be described with accompanying drawings, which should be regarded in an illustrative rather than a restrictive sense.

[0047] The term "exemplary" is used herein to mean "serving as an example, instance, or illustration." Any implementation described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other implementations.

[0048] The term "and / or" herein simply describes an association relationship between associated objects, indicating that three relationships can exist. For example, "A and / or B" can represent the existence of three situations: A alone, A and B simultaneously, and B alone. Furthermore, the term "at least one" herein refers to any combination of at least two of any one or more of a plurality of items. For example, "at least one of A, B, and C" can represent any one or more elements selected from the set consisting of A, B, and C.

[0049] In addition, numerous specific details are provided in the following detailed description to better illustrate the present invention. Those skilled in the art will appreciate that the present invention may be practiced without certain specific details. In some instances, methods, means, components, and circuits well known to those skilled in the art have not been described in detail in order to highlight the main points of the present invention.

[0050] Figure 1 Shows a front view of a wireless flow monitoring device according to an embodiment of the present invention; Figure 2 The embodiment of the present invention is shown Figure 1 Cross-sectional view along BB; Figure 3 Shows a left side view of a wireless flow monitoring device according to an embodiment of the present invention; Figure 4 The embodiment of the present invention is shown Figure 1 Cross-sectional view along AA;

[0051] Figure 5 A schematic structural diagram of a liquid level measurement sensor according to an embodiment of the present invention is shown; Figure 6 The embodiment of the present invention is shown Figure 1 The enlarged view of point I in the middle; Figure 7 FIG. 1 is a schematic diagram showing the structure of an impeller according to an embodiment of the present invention. Figures 1-7 As shown, a wireless flow monitoring device includes: a flow monitoring body 1; the flow monitoring body 1 is horizontally arranged, one end of which is a flow inlet and the other end is a flow outlet; on the side wall of the flow monitoring body 1, a plurality of liquid level measuring sensors 12 are arranged along the circumference, wherein at least one liquid level measuring sensor 12 is arranged at the top position inside the flow monitoring body 1; a flow rate measuring sensor 10 is arranged at the bottom inside the flow monitoring body 1; above the flow monitoring device is arranged a signal analysis wireless transmitter for determining the real-time flow in the body 1 according to the signals measured by the liquid level measuring sensor 12 and the flow rate measuring sensor 10 and sending it to the host computer; the flow monitoring device is internally provided with a self-generating mechanism that generates electricity through fluid flow and supplies power to the liquid level measuring sensor 12, the flow rate measuring sensor 10 and the signal analysis wireless transmitter.

[0052] In the embodiment of the present application, the flow monitoring main body 1 is a cylinder, hollow inside, and open at both ends.

[0053] When the flow monitoring is performed, the fluid to be monitored enters the inside of the flow monitoring main body 1 from one end opening thereof, the liquid level measurement sensor 12 is controlled to start, and the real-time liquid surface position of the fluid in the main body 1 is measured; at the same time, the flow rate measurement sensor 10 is controlled to start, and the real-time flow rate of the fluid in the main body 1 is measured. The liquid level measurement sensor 12 and the flow rate measurement sensor 10 transmit the measured real-time liquid surface position and real-time flow rate to the signal analysis wireless transmitter; after receiving the real-time liquid surface position and real-time flow rate signals, the signal analysis wireless transmitter determines the real-time flow rate of the fluid according to the signals, and transmits the real-time flow rate to the upper computer connected thereto through wireless transmission.

[0054] When the fluid flows in the inside of the main body 1, the self-generating mechanism is started to generate electricity through the fluid flow, and the electric energy is transmitted to the electric equipment such as the liquid level measurement sensor 12, the flow rate measurement sensor 10 and the signal analysis wireless transmitter through the circuit to supply power for the electric equipment.

[0055] Among them, after the multiple liquid level measurement sensors 12 are simultaneously started to measure the liquid level, the measurement results can be compared and verified with each other, for example, the liquid level measurement sensor 12 at the top is the main sensor, then the measurement results of the other sensors are compared with the measurement result of the main sensor to determine whether they match, if not, the liquid level measurement sensor 12 needs to be repaired, so as to ensure the liquid level measurement accuracy.

[0056] Among them, the flow rate measurement sensor 10 is a conductivity sensor, and its working principle is that when the drilling fluid (fluid) flows through the channel in the inside of the main body 1, it cuts the magnetic induction lines when passing through the magnetic field formed by the flow measurement sensor, and then converts the induced electromotive force signal generated by the fluid cutting the magnetic field into the flow rate.

[0057] In the present application, the liquid level measurement sensor 12 is a laser sensor; the number of the liquid level measurement sensor 12 is at least 8, and is uniformly distributed on the side wall of the flow monitoring main body 1.

[0058] In the embodiment of the present application, the sealing ring 11 is arranged between the eight liquid level measuring sensors 12 and the main body 1, so as to prevent the fluid in the main body 1 from overflowing from the gap between the liquid level measuring sensors 12 and the main body 1. The laser sensor is a diffuse reflection laser ranging sensor, and the ranging principle is to detect and measure the distance of the reflected light of the surrounding environment by the photoelectric element. When the liquid level measuring sensor 12 arranged at the top of the flow detection main body 1 measures the real-time liquid surface position, the laser beam emitted by the liquid level measuring sensor 12 is reflected when reaching the fluid liquid surface in the main body 1, the laser beam reflected by the liquid surface is received by the internal photoelectric element, and the time from the emission to the reception of the laser beam is measured by the timer, so as to calculate the distance between the top of the main body 1 and the liquid surface, and the real-time liquid surface position of the fluid in the main body 1 can be determined according to the distance. The measured values of the eight liquid level measuring sensors 12 can be compared and checked with each other, and when the measured values of some liquid level measuring sensors 12 do not match or correspond, it indicates that the accuracy of the sensor is decreased or the sensor is malfunctioned, and the sensor should be repaired to ensure the accuracy of the measurement result.

[0059] In the present application, the liquid level measuring sensor 12 arranged at the top of the flow monitoring main body 1 measures the distance value between the top of the flow monitoring main body 1 and the fluid liquid surface below; according to the distance value, the liquid flow passing through the inside of the flow monitoring main body 1 is determined by formula (1):

[0060] Q=S*V (1);

[0061] Wherein,

[0062]

[0063] In the formula, Q is the flow, V is the flow rate value measured by the flow rate measuring sensor, D is the distance value between the top of the flow monitoring main body and the fluid liquid surface below, r is the radius of the inside of the flow monitoring main body, and y is the height from the bottom of the flow monitoring main body to the fluid liquid surface.

[0064] In the embodiment of the present application, the calculation formula of the cross-sectional area of the fluid in the main body 1 is:

[0065]

[0066] By setting the real-time distance value D between the top of the main body 1 and the fluid liquid surface below measured by the liquid level measuring sensor 12 arranged at the top of the main body 1, the known radius r of the hollow inside of the main body 1, and the real-time height y of the fluid from the bottom to the liquid surface, S corresponding to formula 1-1 is calculated, and then S and the real-time flow rate of the fluid in the main body 1 measured by the flow rate measuring sensor 10 are substituted into formula 1 to calculate the real-time flow of the fluid.

[0067] In the present application, in addition to the liquid level measuring sensor 12 arranged at the top position in the flow monitoring main body 1, the measurement result of the liquid level measuring sensor 12 at the top position is verified by other liquid level measuring sensors 12, specifically including: determining the corresponding verification liquid level value of each liquid level measuring sensor 12, the verification liquid level value being the distance between the position of the liquid level measuring sensor 12 and the top of the flow monitoring main body 1; judging whether the verification liquid level value corresponding to the liquid level measuring sensor 12 is equal to the measurement value of the liquid level measuring sensor 12 at the top position or the difference between the two is within a predetermined range when the measurement value of the other liquid level measuring sensors 12 is 0, except for the liquid level measuring sensor 12 at the top position, if yes, the measurement value of the liquid level measuring sensor 12 at the top position is accurate, otherwise, it is inaccurate.

[0068] In the embodiment of the present application, in addition to the liquid level measuring sensor 12 at the top of the main body 1, the remaining seven sensors are arranged at the bottom and both sides of the main body 1, and each liquid level measuring sensor 12 needs to be inserted into the main body 1 vertically with the side wall of the main body 1 during installation, so as to ensure the sealing effect of the sealing ring 11; the liquid level sensors arranged in this way cannot emit laser vertically downward during measurement, except for the top sensor, so the functions of these sensors are slightly different.

[0069] When the value measured by the liquid level measuring sensor 12 at the bottom is 0 or close to 0, it indicates that the fluid in the main body 1 starts to pass, at this time, if the value of the liquid level measuring sensor 12 at the top does not change, it indicates that the sensor measurement is inaccurate; the liquid level sensor at the bottom of the main body 1 is used to measure whether there is fluid in the main body 1.

[0070] Because the eight liquid level measuring sensors 12 are evenly distributed, in addition to the top and bottom liquid level measuring sensors 12, each side of the main body 1 has three groups of opposite liquid level measuring sensors 12, which are close to the lower, middle and upper parts of the main body 1 respectively. When the fluid inside the main body 1 rises to reach a group of opposite liquid level measuring sensors 12 close to the lower, middle or lower part, the group of liquid level measuring sensors 12 is blocked by the fluid, and the measurement value is 0. At this time, according to the position of the group of opposite liquid level measuring sensors 12 close to the lower, middle or upper part, the position of the fluid level when the measurement value is 0 can be determined, and compared with the real-time liquid level position measured at the same time by the top liquid level measuring sensor 12. If they are the same or the difference is very small, it means that the measurement result of the liquid level measuring sensor 12 is accurate and qualified. Among them, the probe of the group of opposite liquid level measuring sensors 12 close to the upper part emits laser light downward in the main body 1. When the liquid surface reaches a certain height, the group of opposite liquid level measuring sensors 12 close to the upper part can measure the change of the distance of the oblique laser light reaching the liquid surface, and the position of the liquid surface can be determined through conversion. Therefore, when the laser of the group of opposite liquid level measuring sensors 12 close to the upper part irradiates the liquid surface and the liquid surface does not submerge the group of liquid level measuring sensors 12, the liquid level position measured by the group of opposite liquid level measuring sensors 12 close to the upper part can be compared with the measurement value of the top liquid level measuring sensor 12 after conversion, and the top liquid level measuring sensor 12 can be corrected.

[0071] Specifically, when the fluid level in the main body 1 rises to reach the group of opposite liquid level measuring sensors 12 close to the lower part, the height from the bottom of the main body 1 to the liquid surface is 2 cm, the height of the group of opposite liquid level measuring sensors 12 close to the lower part is 2 cm, and the inner diameter of the main body 1 is 10 cm, then the liquid level position should be 10-liquid height 2=8 cm, and if the value measured by the top liquid level measuring sensor 12 is also 8 cm, it means that the measurement result of the liquid level measuring sensor 12 is accurate.

[0072] At the same time, the measurement values of each group of two opposite liquid level measuring sensors 12 can be compared to check whether the results of the two opposite liquid level measuring sensors 12 are consistent. If they are not consistent, it means that one of them has a problem of accuracy decline or failure.

[0073] In the present application, the signal analysis wireless transmitter comprises: a signal analysis conversion circuit 3, a wireless transmission antenna 5 and a circuit protection bin 4; the signal analysis conversion circuit 3 is connected with the liquid level measurement sensor 12 and the flow rate measurement sensor 10; the signal analysis conversion circuit 3 is connected with the wireless transmission antenna 5, and is used for converting analog signals measured by the liquid level measurement sensor 12 and the flow rate measurement sensor 10 into digital signals and then transmitting the digital signals to an upper computer through the wireless transmission antenna 5; and the signal analysis conversion circuit 3 is installed inside the circuit protection bin 4.

[0074] In the embodiment of the present application, the wireless transmission antenna 5 is wrapped with nylon for protection. The circuit protection bin 4 is fixed above the flow monitoring main body 1, and the wireless transmission antenna 5 is installed directly above the circuit protection bin 4 and the flow monitoring main body 1 for signal transmission. The wireless transmission antenna 5 adopts a model bus signal format for transmission, so as to realize stable signal transmission in a complex electromagnetic environment such as a well site.

[0075] The signal analysis conversion circuit 3 receives real-time liquid level positions (distance values) and real-time flow rates sent by the liquid level measurement sensors 12 and the flow rate measurement sensors 10, performs summarization and calculation through formula 1 to obtain an accurate flow value in an equivalent time, converts the flow value into a digital signal, and then transmits the digital signal to an upper computer (a drilling platform) through the wireless transmission antenna 5.

[0076] In the present application, the self-power generation mechanism comprises: an impeller 9, a rotating rod 8 and a power generator 7; the rotating rod 8 is vertically installed inside the flow monitoring main body 1 and can rotate along an axis, the top of the rotating rod 8 is connected with the power generator 7, and the impeller 9 is sleeved on the rotating rod 8; and the power generator 7 is connected with the liquid level measurement sensors 12, the flow rate measurement sensors 10 and the signal analysis wireless transmitter respectively.

[0077] In the embodiment of the present application, the impeller 9 is arranged on the rotating rod 8 close to the bottom of the main body 1. When fluid in the main body 1 passes through the impeller 9, the fluid drives the impeller 9 to rotate, the impeller 9 drives the rotating rod 8 to rotate, and the rotating rod 8 is connected with the power generator 7 to generate current when rotating. An energy storage battery 6 is arranged inside the circuit protection bin 4, and the power generator 7 is connected with the energy storage battery 6, so as to store the electric energy generated by the power generator 7 in the energy storage battery 6. The energy storage battery 6 is connected with the signal analysis conversion circuit 3 and each liquid level measurement sensor 12 and flow rate measurement sensor 10 to supply power for them.

[0078] In the application, the flow monitoring main body 1 is externally sleeved with a sensor protection shell 2, the liquid level measuring sensor 12 is arranged inside the sensor protection shell 2, and the sensor protection shell 2 is filled with heat preservation asbestos for heat preservation of the liquid level measuring sensor 12 and the flow rate measuring sensor 10.

[0079] In the embodiment of the application, the sensor protection shell 2 is filled with asbestos near one side of the shell, and the asbestos plays a role of heat insulation and heat preservation. When the outdoor temperature is too low in winter, and the well fluid does not flow in the main body 1, the sensor may be damaged due to the too low temperature, and therefore, the heat preservation by filling the asbestos can prolong the service life of the sensor.

[0080] In the application, the flow monitoring main body 1 is externally sleeved with a sensor protection shell 2, the sensor protection shell 2 is filled with heat preservation asbestos for heat preservation of the liquid level measuring sensor 12 and the flow rate measuring sensor 10.

[0081] In the embodiment of the application, the sensor protection shell 2 is filled with asbestos near one side of the shell, and the asbestos plays a role of heat insulation and heat preservation. When the outdoor temperature is too low in winter, and the well fluid does not flow in the main body 1, the sensor may be damaged due to the too low temperature, and therefore, the heat preservation by filling the asbestos can prolong the service life of the sensor.

[0082] In the application, the flow monitoring main body 1 is externally sleeved with a sensor protection shell 2, the sensor protection shell 2 is filled with heat preservation asbestos for heat preservation of the liquid level measuring sensor 12 and the flow rate measuring sensor 10.

[0083] In the embodiment of the application, the sensor protection shell 2 is filled with asbestos near one side of the shell, and the asbestos plays a role of heat insulation and heat preservation. When the outdoor temperature is too low in winter, and the well fluid does not flow in the main body 1, the sensor may be damaged due to the too low temperature, and therefore, the heat preservation by filling the asbestos can prolong the service life of the sensor.

[0084] In the embodiment of the application, the sensor protection shell 2 is filled with asbestos near one side of the shell, and the asbestos plays a role of heat insulation and heat preservation. When the outdoor temperature is too low in winter, and the well fluid does not flow in the main body 1, the sensor may be damaged due to the too low temperature, and therefore, the heat preservation by filling the asbestos can prolong the service life of the sensor.

[0085] In the application, the flow monitoring main body 1 is externally sleeved with a sensor protection shell 2, the sensor protection shell 2 is filled with heat preservation asbestos for heat preservation of the liquid level measuring sensor 12 and the flow rate measuring sensor 10.

[0086] In the embodiment of the application, the sensor protection shell 2 is filled with asbestos near one side of the shell, and the asbestos plays a role of heat insulation and heat preservation. When the outdoor temperature is too low in winter, and the well fluid does not flow in the main body 1, the sensor may be damaged due to the too low temperature, and therefore, the heat preservation by filling the asbestos can prolong the service life of the sensor.

[0087] It can be understood that the above-mentioned various embodiments mentioned in the present application can be combined with each other to form a combined embodiment without deviating from the principle logic.

[0088] The wireless flow monitoring device of the present application can adapt to non-full pipe metering requirements, the number of liquid level measurement sensors is 8, which are evenly distributed, can effectively reduce the fluctuation of measurement in the non-full pipe state, and improve the measurement precision and accuracy. The present application also designs a self-generating structure, which drives the impeller, rotating rod and generator to generate electricity through the flowing drilling fluid (fluid), then stores the generated electricity in the energy storage battery to supply power to the whole device, without additional power supply line from the drilling platform.

[0089] The present application can realize accurate monitoring of the flow of wellhead return drilling fluid under non-full pipe, the liquid level measurement sensor has the characteristics of cleaning-free and calibration-free; at the same time, the wireless transmission module and the monitoring device are fixed together, the integration is greatly improved, so that the installation and use are more convenient.

[0090] The above has described the embodiments of the present application, the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those skilled in the art without departing from the scope and spirit of the described embodiments. The choice of terms used herein is intended to best explain the principles, practical application or technical improvement in the market of the embodiments, or to enable other ordinary skilled persons in the art to understand the embodiments disclosed herein.

Claims

1. A wireless traffic monitoring device, characterized in that, The utility model relates to a wireless flow monitoring device, including: Flow monitoring main body (1); The flow monitoring main body (1) is horizontally arranged, one end is flow inlet, the other end is flow outlet; A plurality of liquid level measuring sensors (12) are arranged on the side wall of the flow monitoring main body (1) along the circumference, wherein at least one liquid level measuring sensor (12) is arranged at the top position in the flow monitoring main body (1); A flow velocity measuring sensor (10) is arranged at the bottom in the flow monitoring main body (1); A signal analysis wireless transmitter for determining the real-time flow in the main body (1) according to the signals measured by the liquid level measuring sensors (12) and the flow velocity measuring sensor (10) and sending the signals to the upper computer is arranged above the flow monitoring device; A self-generating mechanism for generating electricity by fluid flow and supplying power to the liquid level measuring sensors (12), the flow velocity measuring sensor (10) and the signal analysis wireless transmitter is arranged inside the flow monitoring device.

2. The wireless flow monitoring device according to claim 1, wherein: The liquid level measuring sensors (12) are laser sensors; The number of the liquid level measuring sensors (12) is at least 8, and the liquid level measuring sensors (12) are uniformly distributed on the side wall of the flow monitoring main body (1).

3. The wireless flow monitoring device according to claim 2, wherein: The distance value between the top position and the liquid surface of the fluid below in the flow monitoring main body (1) is measured by the liquid level measuring sensor (12) arranged at the top position in the flow monitoring main body (1); The liquid flow through the inside of the flow monitoring main body (1) is determined according to the distance value by using formula (1): Q=S*V (1); Wherein: In the formula, Q is the flow, V is the flow velocity value measured by the flow velocity measuring sensor, D is the distance value between the top position and the liquid surface of the fluid below in the flow monitoring main body, r is the radius of the inside of the flow monitoring main body, and y is the height from the bottom of the flow monitoring main body to the liquid surface of the fluid.

4. The wireless flow monitoring device according to claim 2, wherein: In addition to the liquid level measuring sensor (12) arranged at the top position in the flow monitoring main body (1), the measurement results of the liquid level measuring sensor (12) at the top position are verified by using other liquid level measuring sensors (12), specifically including: Determining the verification liquid level value corresponding to each liquid level measuring sensor (12), the verification liquid level value is the distance between the position of the liquid level measuring sensor (12) and the top position in the flow monitoring main body (1); Judging whether the verification liquid level value corresponding to the liquid level measuring sensor (12) is equal to the measurement value of the liquid level measuring sensor (12) at the top position or whether the difference between the two is within a predetermined range when the measurement value of the liquid level measuring sensor (12) is 0, if yes, the measurement value of the liquid level measuring sensor (12) at the top position is accurate, otherwise, it is inaccurate.

5. The wireless traffic monitoring device of claim 1, wherein, The signal analysis wireless transmitter includes a signal analysis conversion circuit (3), a wireless transmitting antenna (5) and a circuit protection bin (4). The signal analysis conversion circuit (3) is connected with the liquid level measuring sensor (12) and the flow rate measuring sensor (10). The signal analysis conversion circuit (3) is connected with the wireless transmitting antenna (5), and is used for converting analog signals measured by the liquid level measuring sensor (12) and the flow rate measuring sensor (10) into digital signals and then transmitting the digital signals to an upper computer through the wireless transmitting antenna (5). The signal analysis conversion circuit (3) is installed inside the circuit protection bin (4).

6. The wireless traffic monitoring device of claim 1, wherein, The self-power generation mechanism comprises an impeller (9), a rotating rod (8) and a power generator (7). The rotating rod (8) is vertically installed inside the flow monitoring main body (1) and can rotate along an axis, the top of the rotating rod (8) is connected with the power generator (7), and the impeller (9) is sleeved on the rotating rod (8). The power generator (7) is connected with the liquid level measuring sensor (12), the flow rate measuring sensor (10) and the signal analysis wireless transmitter respectively.

7. The wireless traffic monitoring device of claim 1, wherein, Further comprising: The flow monitoring main body (1) is sleeved with a sensor protection shell (2), and the liquid level measuring sensor (12) is inside the sensor protection shell (2). The sensor protection shell (2) is filled with heat preservation asbestos for heat preservation of the liquid level measuring sensor (12) and the flow rate measuring sensor (10).

8. The wireless traffic monitoring device of claim 1, wherein, Further comprising: A polyurethane coating for preventing the inner wall of the flow monitoring main body (1) from being corroded is arranged on the inner side wall of the flow monitoring main body (1).

9. The wireless traffic monitoring device of claim 1, wherein, Further comprising: An aluminum foil shielding layer is wrapped outside the liquid level measuring sensor (12) and the flow rate measuring sensor (10). The probe part of the liquid level measuring sensor (12) and the flow rate measuring sensor (10) has a WC coating.

10. The wireless flow monitoring device of any one of claims 1-9, wherein, Further comprising: The two ends of the flow monitoring main body (1) are connected with wellhead pipelines through flanges (13) respectively.

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