CN217976181U - Oil well Shan Jingji measuring instrument - Google Patents
Oil well Shan Jingji measuring instrument Download PDFInfo
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- CN217976181U CN217976181U CN202221651727.2U CN202221651727U CN217976181U CN 217976181 U CN217976181 U CN 217976181U CN 202221651727 U CN202221651727 U CN 202221651727U CN 217976181 U CN217976181 U CN 217976181U
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Abstract
The utility model relates to an oil field oil recovery field, concretely relates to oil well Shan Jingji measuring instrument, include: the flow sensor, the water-containing sensor and the pressure sensor are respectively and electrically connected with the microcontroller; the RTU, the DTU, the data recorder and the upper computer are respectively connected with the microcontroller; the upper computer is in communication connection with the data recorder; the pressure sensor, the flow sensor and the water-containing sensor of the utility model are respectively connected with the microcontroller through a constant current power supply circuit; the flow sensor measures the flow through the corresponding relation between the floater and the flow; the flow of the measured fluid is accurate, and the one-way valve enables the meter to have the functions of one-way fluid circulation and reverse stop, so that the phenomenon of 'backward flow' of the fluid production amount in the flow of the wellhead of the oil well is effectively prevented.
Description
Technical Field
The utility model relates to an oil field oil recovery field, concretely relates to oil well Shan Jingji measuring instrument.
Background
At present, in the field of oil extraction in oil fields, in order to obtain Shan Jingcai liquid volume and meet the related technical requirements of Q/SY150-2005 'Low-yield oil field oil well metering specification', a metering device needs to be installed on a wellhead. The existing metering device has the disadvantages of complex structure, inconvenient disassembly and high device cost due to the structure reason; meanwhile, the measurement accuracy is poor, the device is not suitable for small oil fields, the data transmission mode is backward, the technical analysis of an oil production well is influenced, and the existing measurement device cannot effectively prevent the phenomenon that the liquid production amount flows backwards in the process of an oil well wellhead, so that the authenticity of the liquid production amount and the water content recording cannot be ensured.
Therefore, it is necessary to design a single well flow water-holding metering device for oil well production.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome prior art's defect, provide an oil well Shan Jingji appearance.
An oil well Shan Jingji meter, wherein said oil well single well meter comprises: the measuring instrument comprises a measuring instrument shell, a measuring instrument body and a measuring instrument body, wherein the measuring instrument shell comprises a first pipeline and a second pipeline which are sequentially arranged along the flowing direction of a fluid, and the first pipeline is connected with the second pipeline in a sealing mode;
a flow sensor is arranged in the first pipeline, and a water-containing sensor, a pressure sensor and a one-way valve are sequentially arranged in the second pipeline along the flowing direction of fluid ；
The outer part of the metering instrument is provided with a data recorder, an RTU (remote terminal unit), a DTU (data transfer unit) and an upper computer, the outer shell of the metering instrument is tubular, and the outer walls of the two ends of the outer shell of the metering instrument are provided with threads for connecting other pipelines;
the moisture sensor, the pressure sensor and the flow sensor are respectively and electrically connected with the microcontroller and are respectively used for online real-time measurement of moisture value, pressure and flow;
the RTU, the DTU, the data recorder and the upper computer are respectively connected with the microcontroller; the system is used for realizing remote data monitoring, the DTU is used for transmitting fluid flow, water content value and pressure measurement data, and the RTU is used for transmitting and collecting the fluid flow, water content value and pressure measurement data; the upper computer is also in communication connection with the data recorder; the data recorder is used for recording flow, water content value and pressure measurement data;
the flow sensor comprises a first mounting pipe, a floater, a lantern ring and a conical spring;
the outer wall of the first installation pipe is connected with the inner wall of the first pipeline in a sealing mode, a first connecting rod is arranged at the center of the inside of the first installation pipe, the inner wall of the first installation pipe is fixedly connected with the outer wall of the first connecting rod through screws, the floater and the conical spring are sequentially sleeved on the first connecting rod along the flowing direction of fluid, the outer side of the floater is nested in the lantern ring, and the outer wall of the lantern ring is fixedly connected with the inner wall of the first installation pipe;
an induction coil is wound on the floater;
and the outer wall of the one-way valve is hermetically connected with the inner wall of the second pipeline.
Further, the oil well Shan Jingji measuring instrument further comprises a power supply, a keyboard, an LCD display and a data storage unit;
the power supply, the data storage unit, the keyboard and the LCD display are respectively electrically connected with the microcontroller, and the data storage unit is used for inquiring historical data.
Further, the oil well Shan Jingji measuring instrument further comprises a gauge head, the gauge head is communicated with a first installation pipe of the flow sensor, and a measuring end of the gauge head is in contact with fluid in the first pipeline and used for displaying flow measurement data in real time through a display screen.
Further, the water-containing sensor is tubular and comprises a second connecting pipe, the second connecting pipe is arranged in the second pipeline, a strip-shaped through hole is formed in the side wall of the lower half portion of the side wall of the lantern ring, one part of fluid flows into the first installation pipe, the other part of fluid flows into the second pipeline along a first channel formed between the inner wall of the first connecting pipe and the outer wall of the first installation pipe, one end of the second connecting pipe is hermetically connected with one end, close to the conical spring, of the flow sensor, a second channel is formed between the water-containing sensor and the inner cavity of the second pipeline and used for containing the fluid, and the water-containing sensor is electrically connected with the microcontroller and used for measuring the water content;
the other end of the second connecting pipe is contacted with the one-way valve.
Further, the pressure sensor, the flow sensor and the microcontroller are respectively connected through a constant current power supply circuit;
further, the power supply is connected with the microcontroller through a power supply management module, and the power supply management module comprises external power supply or battery power supply.
Further, the upper computer is a single chip microcomputer.
Further, the outer diameter of the meter shell is 67mm, and the length of the meter shell is 370mm; the gauge outfit height is 145mm.
Further, the water-containing sensor is a PFA probe;
compared with the prior art, the beneficial effects of the utility model reside in that:
(1) The oil well Shan Jingji measuring instrument of the utility model is connected with other pipelines by the threads arranged on the side walls of the two ends of the shell of the measuring instrument, and is convenient to disassemble; the water content sensor, the pressure sensor and the flow sensor are respectively and electrically connected with the microcontroller and are respectively used for online real-time measurement of water content value, pressure and flow; the pressure sensor, the flow sensor and the water-containing sensor are respectively connected with the microcontroller through a constant current power supply circuit; the flow sensor comprises a first mounting pipe, a floater, a lantern ring and a conical spring, and the flow sensor measures flow through the corresponding relation between the position of the floater in the first mounting pipe and the flow passing through the floater, and basically has no friction force; the measured flow is accurate; the related technical requirements of Q/SY150-2005 'oil well metering specification of low-yield oil field' are met; the device is suitable for metering oil, water and gas mixed liquid, and the metering precision is not influenced by the oil gas flow type and the flow state; the check valve enables the meter to have the functions of one-way fluid circulation and reverse stop, effectively prevents the phenomenon of 'backward flow' of the liquid yield in the flow of the wellhead of the oil well, and ensures the authenticity of the liquid yield and water content recording; the PFA probe adopted by the water-containing sensor has high chemical stability;
the RTU, the DTU, the data recorder and the upper computer are respectively connected with the microcontroller; the upper computer is in communication connection with the data recorder; the data recorder is used for recording the flow, the water content value and the pressure measurement data, the DTU is used for transmitting the fluid flow, the water content value and the pressure measurement data, the RTU is used for transmitting and collecting the fluid flow, the water content value and the pressure measurement data,
(2) The oil well Shan Jingji measuring instrument is compatible with external power supply 24V and battery power supply, and when the instrument enters a low power consumption mode, the power supply of each measuring circuit is turned off, so that power consumption is reduced, and working time is prolonged.
Drawings
The following drawings are merely illustrative of and explanatory of the invention and are not intended to limit the scope of the invention, wherein:
FIG. 1: the connection schematic diagram of the oil well single well metering instrument of the utility model is shown;
FIG. 2: the electric connection diagram of the oil well single well metering instrument of the utility model is shown;
FIG. 3: the structure schematic diagram of the oil well Shan Jingji measuring instrument of the utility model is shown;
in the figure: the device comprises a water-containing sensor 1, a flow sensor 2, a floater 2-1, a lantern ring 2-2, a conical spring 2-3, a pressure sensor 3, a data storage unit 4, a data recorder 6, a power supply 7, an upper computer 8, an LCD 9, a keyboard 10, a gauge head 11, a check valve 12, a first pipeline 13 and a second pipeline 14.
Detailed Description
In order to make the objects, technical solutions, design methods, and advantages of the present invention more clear, the present invention will be further described in detail by the following embodiments with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
As shown in fig. 1-3, the utility model provides an oil well Shan Jingji appearance, oil well individual well measurement appearance includes: the fluid flow meter comprises a meter shell, a flow meter and a flow meter, wherein the meter shell comprises a first pipeline 13 and a second pipeline 14 which are sequentially arranged along the flow direction of a fluid, and the first pipeline 13 and the second pipeline 14 are connected in a sealing mode;
a flow sensor 2 is arranged in the first pipeline 13, and a water-containing sensor 1, a pressure sensor 3 and a one-way valve 12 are sequentially arranged in the second pipeline 14 along the fluid flowing direction ；
The outer part of the metering instrument is provided with a data recorder, an RTU (remote terminal unit), a DTU (data transfer unit) and an upper computer, the outer shell of the metering instrument is tubular, and the outer walls of the two ends of the outer shell of the metering instrument are provided with threads for connecting other pipelines;
the moisture sensor 1, the pressure sensor 3 and the flow sensor 2 are respectively electrically connected with the microcontroller and are respectively used for online real-time measurement of moisture value, pressure and flow;
the RTU, the DTU, the data recorder 6 and the upper computer 8 are respectively connected with the microcontroller; the system is used for realizing remote data monitoring, the DTU is used for transmitting fluid flow, water content value and pressure measurement data, and the RTU is used for transmitting and collecting the fluid flow, water content value and pressure measurement data; the upper computer 8 is also in communication connection with the data recorder 6; the data recorder is used for recording flow, water content value and pressure measurement data;
the flow sensor 2 comprises a first mounting pipe, a floater 2-1, a lantern ring 2-2 and a conical spring 2-3;
the outer wall of the first installation pipe is connected with the inner wall of the first pipeline 13 in a sealing mode, a first connecting rod is arranged at the center of the first installation pipe, the inner wall of the first installation pipe is fixedly connected with the outer wall of the first connecting rod through a screw, the floater 2-1 and the conical spring 2-3 are sequentially sleeved on the first connecting rod along the fluid flowing direction, the lantern ring 2-2 is nested on the outer side of the floater 2-1, and the outer wall of the lantern ring 2-2 is fixedly connected with the inner wall of the first installation pipe;
an induction coil is wound on the floater 2-1;
the outer wall of the one-way valve 12 is hermetically connected with the inner wall of the second pipeline 14;
it should be noted that, the RTU and the DTU are connected with the microcontroller through RS 232; the data recorder 6 is connected with the microcontroller through RS485, and the upper computer 8 is connected with the microcontroller through RS 232; the upper computer 8 is also in communication connection with the data recorder 6, acquires data, can display and store the data in real time after calculation, and realizes remote data monitoring by relying on a well site wireless network;
the second pipeline 14 is in an annular tubular shape and is made of 35CrMo; the oil well Shan Jingji measuring instrument has good waterproof performance;
in a specific embodiment, the flow of the oil well Shan Jingji measuring instrument of the present invention is measured by a flow sensor, the flow sensor 2 comprises a first mounting tube, a float 2-1, a lantern ring 2-2 and a conical spring 2-3, when a measured fluid passes through an annular gap formed by the first mounting tube, the conical spring 2-3 and the float 2-1, differential pressure is generated at two ends of the float 2-1 to form a pushing force for moving the float 2-1, when the fluid pushing force applied to the float 2-1 is greater than the resistance of the float 2-1 immersed in the fluid, the float moves, the area of the annular gap is increased accordingly, the fluid flow rate at the annular gap is immediately reduced, the differential pressure at two ends of the float 2-1 is reduced, the pushing force applied to the float 2-1 is also reduced accordingly, and when the pushing force is equal to the resistance of the float immersed in the fluid, the float 2-1 is stabilized at a certain position; the flow sensor 2 is adopted to measure the flow by the corresponding relation between the position of the floater 2-1 in the first installation pipe and the flow passing through the first installation pipe, the friction force is basically avoided, the starting displacement can be small, the flow sensor 2 is connected with the microprocessor through a constant current circuit, a coil is wound on the floater, the constant current circuit provides constant current excitation for the floater induction coil, when the floater is moved by fluid, induced electromotive force can be generated, and the flow is measured by measuring the amplitude of the induced electromotive force; therefore, the flow sensor 2 can accurately measure the flow;
further, the oil well Shan Jingji measuring instrument further comprises a power supply 7, a keyboard 10, an LCD display 9 and a data storage unit 4; the power supply 7, the keyboard 10, the LCD display 9 and the data storage unit 4 are respectively electrically connected with the microcontroller; the data storage unit 4 is used for storing historical data to facilitate subsequent query;
further, the oil well Shan Jingji measuring instrument further comprises a gauge head 11, the gauge head 11 is installed on the side wall of the first pipeline 13, the gauge head 11 is communicated with a first installation pipe of the flow sensor 2, and a measuring end of the gauge head 11 is in contact with fluid in the first pipeline 13 and is used for displaying flow measurement data in real time through a display screen;
further, the water-containing sensor 1 is tubular, the water-containing sensor 1 comprises a second connecting pipe, the second connecting pipe is arranged in the second pipeline 14, a strip-shaped through hole is formed in the side wall of the lower half part of the side wall of the lantern ring 2-2, one part of fluid flows into the first installation pipe, the other part of fluid flows into the second pipeline 14 along a first channel formed between the inner wall of the first connecting pipe and the outer wall of the first installation pipe, one end of the second connecting pipe is hermetically connected with one end, close to the conical spring 2-3, of the flow sensor 2, a second channel is formed between the water-containing sensor 1 and the inner cavity of the second pipeline 14 and used for containing the fluid, and the water-containing sensor 1 is electrically connected with the microcontroller and used for measuring the water content;
the other end of the second connecting pipe is in contact with the one-way valve 12;
the water sensor 1 and the second pipe 14 of the oil well Shan Jingji measuring instrument form a capacitance, and when fluid flows through the water sensor 1, the dielectric constant between the water sensor 1 and the second pipe 14 changes, and the capacitance value formed also changes; the water content is different, the dielectric constant is different, so the formed capacitance values are different, and the capacitance values and the water content are in corresponding relation;
further, the pressure sensor 3, the flow sensor 2 and the water-containing sensor 1 are respectively connected with the microcontroller through a constant current power supply circuit;
it should be noted that the pressure sensor 3 is a pressure sensor in the prior art, the pressure sensor of the oil well single well meter adopts a constant current power supply circuit, the output pressure differential voltage signal is in direct proportion to the pressure of the flow, and the pressure signal is acquired by the singlechip AD; the flow sensor 2 is connected with the microprocessor through a constant current circuit, a coil is wound on the floater, the constant current circuit provides constant current excitation for the floater induction coil, when the floater is moved by fluid, induced electromotive force can be generated, and the flow can be measured by measuring the amplitude of the induced electromotive force; therefore, the flow sensor 2 can accurately measure the flow;
further, the power supply is connected with the microcontroller through a power supply management module, and the power supply management module comprises external power supply or battery power supply;
it should be noted that, the instrument adopts two power supply modes, a power management module is added, and when the instrument enters a low power consumption mode, the power of each measuring circuit is turned off to reduce power consumption and prolong working time;
further, the upper computer is a single chip microcomputer;
it should be noted that 1) the single chip microcomputer comprises a serial port, reads and writes the type of the oil well Shan Jingji measuring instrument, and reads and writes the serial number of the oil well single well measuring instrument; 2) And (3) checking the oil well single well meter: the oil well single well metering instrument directly reads and checks whether the oil well Shan Jingji metering instrument works normally and whether each parameter information is correct; 3) Sampling interval: sampling intervals can be set in groups, so that the sampling points of the oil well Shan Jingji measuring instrument are flexible, and the minimum sampling interval is 1 second; 4) The oil well single well measuring instrument is characterized by comprising the following steps: the device comprises pressure calibration, flow calibration and water-containing scale input functions, and after calibration is completed, scales are written into an appointed storage page of the oil well single well metering instrument; 5) And data processing and replaying the data of the oil well single well measuring instrument, separating all parameters, drawing curves of all parameters respectively according to flow, pressure and water content, storing and opening curve data files, and outputting corresponding reports at a later stage according to customer requirements. Because the amount of data stored in the oil well single well meter is large, split screen drawing and thinning drawing are adopted during curve drawing so as to improve the drawing speed; the curve has the functions of zooming in and zooming out for convenient viewing; in addition, the average value of the water content and the flow in a period of time can be calculated, so that the explanation is convenient;
further, the outer diameter of the meter shell is 67mm, and the length of the meter shell is 370mm; the height of the gauge head is 145mm;
further, the water-containing sensor 1 is a PFA water-containing probe;
it should be noted that the moisture sensor 1 is a PFA probe, and has high chemical stability;
it is worth noting that a christmas tree is a wellhead device for producing oil, such as a flowing well and a mechanical production well. The oil gas production control device is main equipment for controlling and adjusting oil gas production at the uppermost part of an oil gas well, and mainly comprises a casing head, a tubing head and an oil (gas) production tree body; the oil well Shan Jingji measuring instrument mainly realizes on-line calibration and continuous measurement of the yield of a single well and a well group under pressure, and the actual liquid production and oil production rule of the oil well are known.
The oil well Shan Jingji measuring instrument is horizontally arranged on a wellhead Christmas tree, a pipeline of the oil well Shan Jingji measuring instrument is connected with a Christmas tree pipeline through threads, the oil machine Shan Jingji measuring instrument is compatible with two modes of external power supply and battery power supply, the external power supply is 24V, the external power supply consists of a water holding probe, a pressure sensor, a flow sensor and a constant current circuit, and an internal hardware circuit can be automatically switched; the flow, the water content value and the pressure can be measured on line in real time, and the measured data is displayed in real time through a display screen; meanwhile, the system has a data storage unit and a historical data query function, and can realize remote data monitoring by depending on a well site wireless network; the device is suitable for metering oil, water and gas mixed liquid, and the metering precision is not influenced by the oil gas flow type and flow state; the oil well single well measuring instrument is light, flexible in connection, convenient to detach and accurate in measurement; the on-site measurement of the liquid production amount of the single well can be realized, and the related technical requirements of Q/SY150-2005 'oil well measurement standard of low-yield oil field' are met;
the outer diameter of the oil well single well meter pipeline is 67mm, and the length of the oil well single well meter pipeline is 370mm; the height of the gauge head is 145mm; the water-containing sensor, the flow sensor and the pressure sensor are respectively connected with the microcontroller; the RTU and the DTU are connected with the microcontroller through RS 232; the data recorder is connected with the microcontroller through RS485, and the upper computer is connected with the microcontroller through RS 232; the upper computer is also in communication connection with the data recorder;
1. by arranging the one-way valve, the meter has the functions of one-way fluid circulation and reverse stop, the phenomenon of 'backward flow' of the liquid yield in the flow of an oil well wellhead is effectively prevented, and the authenticity of the liquid yield and water content recording is ensured; the pressure sensor adopts a capacitance method to test water holding, is not easily influenced and changed by the outside, and is basically free of friction force due to the arrangement of the flow sensor, so that the displacement can be very small, and the flow measurement is accurate; the PFA probe adopted by the water-containing sensor has high chemical stability;
2. the oil well single well measuring instrument is provided with a corresponding single chip microcomputer in a matched mode, the single chip microcomputer is connected with the data recorder through a wireless network, collected data can be analyzed and processed, accurate measuring information is obtained, and a meter head displays required data after data processing of the data processing unit.
While various embodiments of the present invention have been described above, the above description is intended to be illustrative, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or improvements made to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
Claims (9)
1. An oil well Shan Jingji meter, wherein said oil well single well meter comprises: the fluid flow meter comprises a meter shell, a flow meter and a flow meter, wherein the meter shell comprises a first pipeline and a second pipeline which are sequentially arranged along the flow direction of fluid, and the first pipeline and the second pipeline are in sealed connection;
a flow sensor is arranged in the first pipeline, and a water-containing sensor and a pressure sensor are sequentially arranged in the second pipeline along the flowing direction of fluidAnd a check valve ；
The outer part of the metering instrument is provided with a data recorder, an RTU (remote terminal unit), a DTU (data transfer unit) and an upper computer, the outer shell of the metering instrument is tubular, and the outer walls of the two ends of the outer shell of the metering instrument are provided with threads for connecting other pipelines;
the moisture sensor, the pressure sensor and the flow sensor are respectively and electrically connected with the microcontroller and are respectively used for online real-time measurement of moisture value, pressure and flow;
the RTU, the DTU, the data recorder and the upper computer are respectively connected with the microcontroller; the system is used for realizing remote data monitoring, the DTU is used for transmitting fluid flow, water content value and pressure measurement data, and the RTU is used for transmitting and collecting the fluid flow, water content value and pressure measurement data; the upper computer is also in communication connection with the data recorder; the data recorder is used for recording flow, water content value and pressure measurement data;
the flow sensor comprises a first mounting pipe, a floater, a lantern ring and a conical spring;
the outer wall of the first installation pipe is connected with the inner wall of the first pipeline in a sealing mode, a first connecting rod is arranged at the center of the inside of the first installation pipe, the inner wall of the first installation pipe is fixedly connected with the outer wall of the first connecting rod through screws, the floater and the conical spring are sequentially sleeved on the first connecting rod along the flowing direction of fluid, the lantern ring is nested on the outer side of the floater, and the outer wall of the lantern ring is fixedly connected with the inner wall of the first installation pipe;
an induction coil is wound on the floater;
and the outer wall of the one-way valve is hermetically connected with the inner wall of the second pipeline.
2. The oil well Shan Jingji instrument of claim 1 wherein said oil well Shan Jingji instrument further comprises a power source, a keyboard, an LCD display and a data storage unit;
the power supply, the data storage unit, the keyboard and the LCD display are respectively electrically connected with the microcontroller, and the data storage unit is used for storing historical data to facilitate subsequent inquiry.
3. The oil well Shan Jingji gauge according to claim 1, wherein said oil well Shan Jingji gauge further comprises a gauge head, said gauge head is fixedly connected with meter housing screw thread, said gauge head is respectively connected with water-containing sensor, pressure sensor and flow sensor by circuit for real-time displaying water-containing value, pressure and flow through display screen.
4. The oil well Shan Jingji measuring instrument as claimed in claim 1, wherein the water sensor is tubular, the water sensor comprises a second connecting pipe, the second connecting pipe is disposed in the second pipeline, the sidewall of the lower half portion of the sidewall of the collar is provided with a strip-shaped through hole, a part of the fluid flows into the first installation pipe, another part of the fluid flows into the second pipeline along a first channel formed between the inner wall of the first connecting pipe and the outer wall of the first installation pipe, one end of the second connecting pipe is hermetically connected with one end of the flow sensor close to the conical spring, a second channel is formed between the water sensor and the inner cavity of the second pipeline, the second channel is used for containing the fluid, and the water sensor is electrically connected with the microcontroller and used for measuring the water content;
the other end of the second connecting pipe is contacted with the one-way valve.
5. The oil well Shan Jingji measuring instrument as claimed in claim 1, wherein the water sensor, the pressure sensor and the flow sensor are connected to the microcontroller through constant current power supply circuits respectively.
6. The oil well Shan Jingji meter of claim 2 wherein the power source and microcontroller are connected through a power management module, the power management module comprising an external power supply or a battery power supply.
7. The oil well Shan Jingji measuring instrument as claimed in claim 1, wherein the upper computer is a single chip microcomputer.
8. The oil well Shan Jingji meter of claim 3 wherein said meter housing has an outer diameter of 67mm and a length of 370mm; the gauge outfit height is 145mm.
9. The oil well Shan Jingji instrument of claim 1 wherein said water-containing sensor is a PFA probe.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221651727.2U CN217976181U (en) | 2022-06-28 | 2022-06-28 | Oil well Shan Jingji measuring instrument |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221651727.2U CN217976181U (en) | 2022-06-28 | 2022-06-28 | Oil well Shan Jingji measuring instrument |
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| CN217976181U true CN217976181U (en) | 2022-12-06 |
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| CN202221651727.2U Active CN217976181U (en) | 2022-06-28 | 2022-06-28 | Oil well Shan Jingji measuring instrument |
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