CN212228187U

CN212228187U - Remove well head flow calibration device

Info

Publication number: CN212228187U
Application number: CN202021609740.2U
Authority: CN
Inventors: 陈继革; 罗超; 贺杨; 徐斌; 李敬阳
Original assignee: Chengdu Yangpai Technology Co ltd
Current assignee: Chengdu Yangpai Technology Co ltd
Priority date: 2020-08-05
Filing date: 2020-08-05
Publication date: 2020-12-25
Anticipated expiration: 2030-08-05

Abstract

The utility model relates to a mobile wellhead flow calibration device, belonging to the technical field of flowmeter calibration, comprising a gas-liquid separator used for communicating with a collection and conveying pipeline, a demister communicated with the gas-liquid separator and a liquid storage tank, wherein the output end of the demister is connected with a wet gas flow metering assembly, and the output end of the liquid storage tank is connected with a mass flow metering assembly; a gas-liquid separator for separating the medium into a gas-phase medium mainly composed of gas and a liquid-phase medium mainly composed of liquid; the demister is used for secondary separation of gas-phase media after gas-liquid separation; the liquid storage tank is positioned below the gas-liquid separator and used for storing liquid-phase media; a moisture flow metering assembly for measuring a mass flow of moisture dominated by gaseous media; and the mass flow metering component is used for measuring the mass flow of the liquid phase mainly comprising the liquid medium. The method and the device have the effect of improving the gas-liquid two-phase online metering calibration precision under the full-flow condition.

Description

Remove well head flow calibration device

Technical Field

The application relates to the technical field of flowmeter calibration, in particular to a mobile wellhead flow calibration device.

Background

At present, in the process of exploitation of an oil and gas well, a metering device is required to be arranged on a collecting and conveying pipeline of the oil and gas well to perform real-time online measurement on liquid and gas in the oil and gas well, and the conventional oil and gas well metering adopts in-station metering and wellhead metering. The in-station metering process adopts the steps of separating first and then carrying out gas metering on natural gas, the gas metering precision is high, but the liquid metering error is large; and the well head measurement belongs to the on-line measurement. With the large-scale exploitation of shale gas at present and the continuous optimization and improvement of a single-well gathering and transportation technology, the yield metering of gathering and transportation to a metering station is transferred to wellhead metering, the wellhead metering is gradually changed from separation metering to a mixed-phase flowmeter which does not need separation, and the wellhead metering begins to select the multiphase flowmeter which does not need separation due to the continuous progress of a real-time online multiphase metering technology.

But for the calibration of the multiphase flowmeter, the flow calibration of the single-phase medium by using the single-phase instrument is still needed after the high-efficiency separation. The existing online metering calibration device under the full flow condition has the problem of poor calibration accuracy and other applicability problems because the gas-liquid separation cannot ensure complete separation, namely a gas path can contain a small amount of liquid and a liquid path can also contain a small amount of gas (such as foam crude oil and the like containing dissolved gas).

SUMMERY OF THE UTILITY MODEL

In order to improve the gas-liquid two-phase online measurement calibration accuracy under the full flow condition, this application provides a remove well head flow calibration device.

The application provides a remove wellhead flow calibration device adopts following technical scheme:

a flow calibration device for a movable wellhead comprises a gas-liquid separator, a demister and a liquid storage tank, wherein the gas-liquid separator is used for being communicated with a collecting and conveying pipeline, the demister is communicated with the gas-liquid separator, the output end of the demister is connected with a wet gas flow metering assembly, and the output end of the liquid storage tank is connected with a mass flow metering assembly;

the gas-liquid separator is used for separating the medium into a gas-phase medium mainly comprising gas and a liquid-phase medium mainly comprising liquid;

the demister is used for secondary separation of gas-phase media after gas-liquid separation;

the liquid storage tank is positioned below the gas-liquid separator and used for storing liquid phase media;

the moisture flow metering component is used for measuring the mass flow of the moisture mainly comprising the gas medium;

the mass flow metering assembly is used for measuring the mass flow of a liquid phase mainly comprising a liquid medium.

By adopting the technical scheme, the medium flows into the gas-liquid separator after flowing out of the collecting and conveying pipeline, the gas-liquid separator performs gas-liquid separation on the medium to obtain a gas-phase medium and a liquid-phase medium, the gas-phase medium flows through the demister, the demister is connected with the wet gas flow metering assembly, and the influence of liquid contained in the gas-phase medium on the metering precision is reduced or even eliminated through the metering of the wet gas flow metering assembly; the liquid phase medium flows through the liquid storage tank, the liquid storage tank is positioned below the gas-liquid separator, a liquid seal is formed by the liquid level of the liquid phase medium in the liquid storage tank, so that the volume gas content/GVF in the liquid phase medium is far less than 3%, the liquid storage tank is connected with a mass flow metering assembly, the gas content of the liquid phase medium has low influence on the metering precision of the mass flow meter at the moment because the gas content in the liquid phase medium is less than 3%, and the metering precision of the integral calibration device is greatly improved through the position arrangement of the wet gas flow metering assembly, the gas-liquid separator and the liquid storage tank.

Preferably, the wet gas flow meter measuring assembly comprises two sets of wet gas flow meters with different calibers and two check valves respectively arranged at inlets of the wet gas flow meters, and the check valves are used for controlling the connection or disconnection of the wet gas flow meters connected with the check valves and the demisters; the mass flow metering component comprises two sets of mass flowmeters with different calibers and two valves respectively arranged at inlets of the mass flowmeters, and the valves are used for controlling the mass flowmeters connected with the valves to be communicated or stopped with the liquid storage tanks.

By adopting the technical scheme, in the process of oil and gas well exploitation, a user can select the moisture flow meters with different calibers to carry out real-time metering according to different gas phase medium flows flowing into the demister, so that the moisture flow meter metering assembly can realize continuous accurate metering; the mass flow meters with different calibers can be selected according to different flow rates of the liquid phase medium flowing into the liquid storage tank for real-time metering, and the mass flow metering assembly can realize continuous accurate metering.

Preferably, the gas-liquid separator comprises a shell and a spiral flow guide body arranged inside the shell in a vertical spiral mode, the axis of the spiral flow guide body coincides with the axis of the shell, the outer side wall of the spiral flow guide body is connected with the inner wall of the shell in a sealing mode, and the inlet of the gas-liquid separator is arranged above the spiral flow guide body.

By adopting the technical scheme, the spiral flow guide body is arranged in the shell, after the medium enters the gas-liquid separator through the input pipe, the medium flows along the inclined direction of the spiral flow guide body under the guidance of the spiral flow guide body, meanwhile, under the action of centrifugal force and gravity and under the limitation of the spiral flow guide body, the medium forms an inverted cone-shaped vortex field, the gas-phase medium with low density rises along the center of the vortex, the liquid-phase medium with high density flows downwards along the inclined surface of the spiral flow guide body, and the spiral flow guide body is used for realizing forced limited-area vortex flow to the medium, so that the gas and the liquid are efficiently separated.

Preferably, an air passage pipe communicated with the demister is arranged in the center of the top of the gas-liquid separator, the center of the end part of the air passage pipe connected with the shell is positioned on the axis of the shell, and the distance between the side wall of the spiral flow guide body close to the axis of the shell and the axis is smaller than or equal to the radius of the air passage pipe, so that the spiral flow guide body forms an air guide hole aligned with the air passage pipe.

Through adopting above-mentioned technical scheme, in the gaseous phase medium leading-in defroster that the gas-liquid separator separates out was managed to the gas circuit, through setting up the air guide hole, made things convenient for gaseous phase medium to rise and get into the gas circuit pipe.

Preferably, the demister is provided with a plurality of collision separation plates for separating gas-phase media and liquid-phase media at intervals along the transmission direction of the demister, the collision separation plates are provided with a plurality of rows of collision parts at intervals, and the collision parts comprise a plurality of air holes distributed at intervals horizontally.

Through adopting above-mentioned technical scheme, because contain certain liquid in the gaseous phase medium, carry out the separation through setting up the transmission of collision separation board to the gaseous phase medium, when gaseous phase medium and collision separation board contact, liquid is stained with and attaches at collision separation board surface to realize gas-liquid separation, through set up the bleeder vent on collision separation board, in order to guarantee that gaseous phase medium passes collision separation board.

Preferably, the collision part further comprises a guide plate which is arranged on one side of the air holes in a one-to-one correspondence manner, the guide plate is arranged on one side of the collision separation plate, which is far away from the gas-liquid separator, and the guide plate is used for shielding the air holes.

Through adopting above-mentioned technical scheme, the deflector sets up on the bleeder vent, and sets up with the bleeder vent one-to-one, when gaseous phase medium passed the bleeder vent, collides with the deflector promptly to increase the area of contact of deflector and collision separation board, improve the gas-liquid separation effect.

Preferably, the collision parts on two adjacent collision separation plates are arranged in a staggered mode at intervals.

Through adopting above-mentioned technical scheme, the crisscross distribution of collision portion on two adjacent collision separation boards to make the gaseous phase medium increase through the route of two collision separation boards, make the time of the flow through defroster of gaseous phase medium increase, in order to improve the filter effect of gaseous phase medium in the defroster.

Preferably, the demister is horizontally arranged above the liquid storage tank along the transmission direction of the demister, and a communicating pipe communicated with the liquid storage tank is arranged below the collision separation plate.

Through adopting above-mentioned technical scheme, set up the defroster in the liquid storage pot top to set up the closed tube that communicates defroster and liquid storage pot, under the effect of closed tube, make in the liquid in the defroster can get into the liquid storage pot, in the gaseous defroster that also can get into of liquid storage pot, thereby improve the separation degree of gas-liquid, improve and mark the precision.

Preferably, the communicating pipe comprises a connecting pipe which is hermetically connected with the liquid storage tank and a liquid phase return pipe which is hermetically connected with the demister, the liquid phase return pipe and the connecting pipe are mutually connected in an inserting way, the diameter of the liquid phase return pipe is smaller than that of the connecting pipe, and the liquid phase return pipe at one end, far away from the liquid storage tank, of the connecting pipe is hermetically connected; the gas-liquid separation device is characterized in that a plurality of gas-liquid separation plates for separating gas-phase media and liquid-phase media are fixedly arranged in the connecting pipe, the liquid-phase return pipe penetrates through the gas-liquid separation plates and is fixedly connected with the gas-liquid separation plates, and a plurality of air return holes are formed in the liquid-phase return pipe between the top of the connecting pipe and the gas-liquid separation plates.

Through adopting above-mentioned technical scheme, the liquid that filters off in the defroster gets into in the liquid storage tank through the liquid phase back flow, the liquid phase medium of liquid storage tank is at the flow in-process, the gas of loading in the liquid phase medium is discharged and rises, because the diameter of connecting pipe is greater than the diameter of liquid phase back flow, gas is at the in-process that rises except that the part is direct to get into the gas in the defroster through the liquid phase back flow, most gas is at the contact of process and gas-liquid separation board that rises and carry out gas-liquid separation under gas-liquid separation board's effect, with the liquid content rate of gas in reducing the defroster that flows back, simultaneously through seting up the return hole on the liquid phase back flow, make the gas in the connecting pipe can get into in the defroster through the liquid phase back flow.

Preferably, a filter screen plate is arranged in the demister.

Through adopting above-mentioned technical scheme, in the oil gas well collection development process, have some particulate matter impurity to follow the medium and get into collection pipeline or even calibration device under high-pressure draught's drive like sand grain, filter particulate matter impurity through filtering the otter board, prevent that particulate matter impurity from causing the damage to the moisture flow meter.

Preferably, the demister comprises a front end tank shell and a rear end tank shell, a flange is arranged between the front end tank shell and the rear end tank shell, the rear end tank shell is connected with the wet gas flow metering assembly, and the filter screen plate is arranged at one end, far away from the wet gas flow metering assembly, of the rear end tank shell.

Through adopting above-mentioned technical scheme, front end tank shell and rear end tank shell pass through flange joint to make front end tank shell and rear end tank shell can dismantle the setting, and set up the position of filtering the otter board, take out with the particulate matter impurity that the convenience will filter the otter board and filter.

Preferably, a solenoid valve is arranged between the liquid storage tank and the mass flow metering assembly, a liquid level meter is arranged on the liquid storage tank, and the liquid level meter is electrically connected with the solenoid valve.

By adopting the technical scheme, the connection and the disconnection between the electromagnetic valve liquid storage tank and the mass flow metering assembly are controlled, so that a liquid-phase medium can be cached in the liquid storage tank, the input gas-liquid ratio and the output gas-liquid ratio are buffered, and a relatively stable flow state is formed; the height of liquid in the liquid storage tank is detected through the liquid level meter, the liquid level meter is electrically connected with the liquid storage tank, and when the height of the liquid in the liquid storage tank reaches a certain degree, the opening and closing of the automatic control electromagnetic valve are realized.

Preferably, a manual valve is arranged between the liquid storage tank and the mass flow metering assembly, and the manual valve and the electromagnetic valve are arranged in parallel.

Through adopting above-mentioned technical scheme, set up manual valve as the reserve of solenoid valve to when guaranteeing necessary, can select according to the user demand, especially when the solenoid valve damages, manual valve can guarantee calibration device normal use.

Preferably, still include the sled dress base, vapour and liquid separator, defroster, liquid storage pot, wet gas flow meter measurement subassembly and mass flow meter subassembly are all installed on the sled dress base, the sled dress base is used for packing into and removes the transport vechicle.

By adopting the technical scheme, the gas-liquid separator, the demister, the liquid storage tank, the wet gas flow metering assembly and the mass flow metering assembly are integrated on the skid-mounted base, so that the calibrating device which is small in size, light in weight and convenient to move is integrated; the skid-mounted base and the equipment on the skid-mounted base are transferred to the mobile transport vehicle, so that the calibration device can be moved, and can be conveniently conveyed to different oil and gas well sites for on-site calibration.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the medium is separated by arranging the gas-liquid separator, the gas-liquid separation effect is improved, meanwhile, the wet gas flow metering assembly is connected into the calibration device, the metering precision is improved by utilizing the metering characteristic of the wet gas flow metering assembly, and the gas content in the liquid phase medium is reduced by the position relation of the liquid storage tank and the gas-liquid separator, so that the high-precision metering effect of the device is realized;

2. the collision separation plate is arranged in the demister, the collision separation plate is used for blocking the transmission of the gas-phase medium, when the gas-phase medium passes through the demister, the gas-phase medium is in full contact collision with the collision separation plate, so that the liquid-phase medium is attached to the collision separation plate when the liquid-phase medium mixed in the gas-phase medium is in contact with the collision separation plate, the gas-liquid separation is further realized, and the metering precision of the wet gas flow metering assembly is improved;

3. by arranging the communicating pipe for communicating the demister and the liquid storage tank, liquid-phase media in the demister flows back into the liquid storage tank through the communicating pipe under the action of gravity, and gas-phase media in the liquid storage tank rise into the demister through the communicating pipe in the rising process, so that the metering precision of the media is further improved;

4. through setting up the sled dress base, will mark required instrument and equipment integration and install on the sled dress base, the calibration device of being convenient for shifts at each oil gas well site scene, reduces the calibration cost of the on-the-spot practical heterogeneous flowmeter of a plurality of oil gas well sites.

Drawings

FIG. 1 is a schematic structural diagram of a calibration device of an embodiment of the present application in connection with an oil and gas wellsite collection and delivery pipeline;

FIG. 2 is a schematic diagram of an overall structure of a calibration device according to an embodiment of the present application;

FIG. 3 is a schematic diagram of a portion of an embodiment of the present application;

FIG. 4 is a partial structural sectional view of the embodiment of the present application, mainly showing the structure of a gas-liquid separator;

FIG. 5 is a sectional view of a portion of the structure of an embodiment of the present application, mainly illustrating the internal structure of a demister;

FIG. 6 is an enlarged view of portion A of FIG. 5;

FIG. 7 is a partial structural cross-sectional view of an embodiment of the present application, mainly illustrating the structure and positional relationship of a plurality of impact separation plates;

FIG. 8 is a partial structural sectional view of the embodiment of the present application, mainly showing the structure of the communicating pipe;

FIG. 9 is an enlarged view of portion B of FIG. 8;

FIG. 10 is a partial structural sectional view of the embodiment of the present application, mainly showing the structure and positional relationship of a plurality of gas-liquid separation plates;

fig. 11 is a schematic overall structure diagram of a calibration device according to an embodiment of the present application;

FIG. 12 is a schematic diagram of a calibration device and a calibration bypass connection assembly according to an embodiment of the present application;

fig. 13 is a step diagram of a calibration method of the calibration apparatus according to the embodiment of the present application.

Description of reference numerals: 1. the base is skid-mounted; 2. a gas-liquid separator; 21. a housing; 22. a spiral flow conductor; 221. an air vent; 23. an air passage pipe; 24. a liquid path pipe; 3. a demister; 31. a front end tank shell; 32. a rear end tank shell; 33. a flange; 34. a collision separation plate; 341. a collision section; 3411. air holes are formed; 3412. a guide plate; 35. a filter screen plate; 4. a liquid storage tank; 41. an electromagnetic valve; 42. a manual valve; 43. a liquid level meter; 5. an input tube; 51. a first shut-off valve; 6. an output pipe; 61. a second stop valve; 62. an air return pipe; 63. a liquid return pipe; 7. a wet gas flow metering assembly; 71. a wet gas flow meter; 711. a resonating tube moisture flow meter; 712. a gas phase flow metering module; 72. a check valve; 8. a mass flow metering assembly; 81. a mass flow meter; 82. a valve; 9. a communicating pipe; 91. a connecting pipe; 92. a liquid phase reflux pipe; 921. a return air hole; 93. a gas-liquid separation plate; 931. a filtering part; 9311. a through hole; 9312. a collision plate; 100. calibrating the bypass connecting assembly; 1001. an output branch pipe; 1002. an input branch pipe; 1003. inputting a stop valve; 1004. an output stop valve; 1005. and (5) conducting the stop valve.

Detailed Description

The present application is described in further detail below with reference to figures 1-13.

Set up metering device on the oil gas well collection pipeline and measure the output of oil gas well liquid and gas to be used for oil gas well development foundation, metering device operates at the well head throughout the year, and its measuring instrument probably produces the systematic deviation, thereby makes its measurement data produce great error, consequently needs to use calibration equipment to carry out the check-up to metering device measurement data. At present, a device for calibrating the flow rate of a multiphase flowmeter is classified according to oil, gas and water media adopted by the device, and a general multiphase flow testing and calibrating device is divided into two categories; one is a device adopting a simulation medium, and is mainly used for multiphase flow simulation test and indoor standard loop test of a prototype of a multiphase flowmeter principle. The device is generally built indoors, the scale is small, and the flow condition is difficult to meet the requirements of field practical application; the other type is a device adopting a solid-liquid medium and actual working condition conditions, and the test and calibration results of the device are more in line with the actual production, so that the oil-gas wellhead calibration and measurement are more recommended to be the device adopting the solid-liquid medium and the actual working condition conditions.

The embodiment of the application discloses a remove wellhead flow calibration device. Referring to fig. 1 and 2, calibration device includes skid-mounted base 1, vertical gas-liquid separator 2 that sets up on skid-mounted base 1, communicates in gas-liquid separator 2's defroster 3 and liquid storage pot 4, and wherein defroster 3 sets up in liquid storage pot 4 top along its transmission direction level, and liquid storage pot 4 is located gas-liquid separator 2's below, and more unobstructed when guaranteeing the transmission of gaseous phase medium, and defroster 3 is located gas-liquid separator 2's top. Wherein the entrance of vapour and liquid separator 2 is connected with input tube 5, and the output of defroster 3 and liquid storage pot 4 is connected with output tube 6 jointly, and input tube 5 and output tube 6 are used for connecting the original pipeline of gathering of oil and gas well, and input tube 5 and output tube 6 are located same horizontal plane with the end port department of gathering pipeline intercommunication simultaneously, prevent to have the pressure differential between input tube 5 and the output tube 6 to influence and mark the precision. The medium flows into the calibration device through the input pipe 5 to be subjected to gas-liquid separation and calibration measurement, and after the measurement is finished, the medium flows back to the acquisition and conveying pipeline after being converged in the output pipe 6 through gas and liquid.

Referring to fig. 1 and 2, in order to facilitate the movement detection of the calibration device, all calibration devices and instruments of the calibration device are mounted on a skid-mounted base 1 so as to be integrated into a skid-mounted calibration device with small volume, light weight and high metering precision. Skid-mounted base 1 and install calibration equipment and instrument on it all can install on removing the transport vechicle, realizes calibration device's transferable through removing the transport vechicle, conveniently transports calibration device to each oil gas well site and carries out online calibration test and use.

Referring to fig. 1 and 2, in order to ensure that the access of the calibration device does not affect the original collection and transportation of the oil and gas well and the measurement of the measurement device, a calibration bypass connection assembly 100 is arranged on the collection conveying pipeline, the calibration bypass connection assembly 100 is used for communicating an output branch pipe 1001 for collecting the conveying pipeline and an input pipe 5 and an input branch pipe 1002 for communicating the collection conveying pipeline and an output pipe 6, an output stop valve 1004 is arranged on the output branch pipe 1001, an input stop valve 1003 is arranged on the input branch pipe 1002, and a conduction stop valve 1005 is arranged between the input branch pipe 1002 and the output branch pipe 1001 for collecting the conveying. When the calibration device needs to be accessed, the input pipe 5 is connected with the output branch pipe 1001, the output pipe 6 is connected with the input branch pipe 1002, and then the output stop valve 1004 and the output stop valve 1004 are opened, and the conduction stop valve 1005 is closed.

Referring to fig. 2 and 3, the gas-liquid separator 2 separates the medium into a gas-phase medium mainly composed of gas and a liquid-phase medium mainly composed of liquid. In order to improve the measurement precision of the calibration device, the gas-liquid separator 2 adopts a vertical cyclone separator, the top of the gas-liquid separator 2 is provided with a gas path pipe 23 communicated with the demister 3, and the lower end of the gas-liquid separator 2 is provided with a liquid path pipe 24 communicated with the liquid storage tank 4. The gas-liquid separator 2 comprises a shell 21 and a spiral guide body 22 vertically and spirally arranged inside the shell 21, wherein the axis of the spiral guide body 22 coincides with the axis of the shell 21, the outer side wall of the spiral guide body 22 is hermetically connected with the inner wall of the shell 21, one end of an air passage pipe 23 is vertically arranged in the center of the top of the shell 21, so that the axis of the end part of the air passage pipe 23 coincides with the axis of the shell 21, the distance between the side wall of one side, close to the axis, of the spiral guide body 22 and the axis is smaller than or equal to the radius of the air passage pipe 23, so that the spiral guide body 22 forms an air guide hole 221 aligned with the air passage pipe 23, the diameter of the air guide hole 221 is far smaller than that of the shell 21, and the amount of a medium flowing along the.

Referring to fig. 4 and 5, the inlet of the gas-liquid separator 2 is disposed at the upper end of the spiral flow guiding body 22, after the medium enters the gas-liquid separator 2 through the input pipe 5, the medium flows along the inclined direction of the spiral flow guiding body 22 under the guidance of the spiral flow guiding body 22, and simultaneously forms an inverted cone-shaped vortex field under the action of centrifugal force and gravity and the limitation of the spiral flow guiding body 22, the gas-phase medium with low density rises along the center of the vortex, namely, rises from the gas guiding hole 221 and enters the gas path pipe 23, the liquid-phase medium with high density flows downward along the inclined surface of the spiral flow guiding body 22 until flowing out from the bottom of the gas-liquid separator 2 and entering the liquid path pipe 24, and the spiral flow guiding body 22 realizes forced limited-area vortex for the medium, so as to separate the.

Referring to fig. 3 and 5, one end of the demister 3 is communicated with the air passage pipe 23, and one end of the demister 3 far away from the air passage pipe 23 is connected with a moisture flow metering assembly 7 for measuring the mass flow of moisture mainly comprising a gas medium. The wet gas flow metering assembly 7 comprises two sets of wet gas flow meters 71 with different calibers and two check valves 72 respectively arranged at the inlets of the wet gas flow meters 71, wherein the check valves 72 are used for controlling the wet gas flow meters 71 connected with the check valves to be communicated with or cut off from the demister 3. Along with the continuous exploitation of the oil-gas well, the exploitation amount of the oil-gas well changes, and when the flow entering the gas path pipe 23 is large, a wet gas flowmeter 71 with a large caliber is adopted to meet the requirement of large-flow metering; when the flow rate into the air passage pipe 23 is small, the wet gas flow meter 71 having a small diameter is used to satisfy the small flow rate measurement. In the calibration process, when the medium flow in the air path pipe 23 changes, only the check valve 72 connected to the wet gas flow meter 71 with the corresponding required caliber needs to be opened, and the check valve 72 of the wet gas flow meter 71 which is originally conducted and metered is closed, so that the wet gas flow meter metering assembly 7 can realize continuous and accurate metering.

Referring to fig. 5, in the present application, the moisture flow meter 71 preferably employs a resonator tube-based moisture flow meter 71, which includes a resonator tube moisture flow meter 711, pipes disposed at an inlet and an outlet of the resonator tube moisture flow meter 711, respectively, a gas phase flow metering module 712, and a sensor group. The resonance tube moisture flow meter 711 is used for measuring the total mass flow Qm, the mixing density rho mix and the medium temperature T; the sensor group is arranged on the pipeline and used for measuring the differential pressure delta P between the inlet and the outlet of the resonance tube wet gas flowmeter 711; the gas phase flow metering module 712 performs multi-physical field coupling calculation, calculates the pressure of the corresponding position according to different positions in the pipeline measured by the resonance tube moisture flow meter 711, and generates a function curve of the position and the pressure, the gas phase flow metering module 712 calculates the average pressure P in the pipeline measured by the resonance tube moisture flow meter 711 according to the function curve, calculates the average air density ρ g by combining the average pressure P with a PVT equation, and calculates the mass liquid content η m of the mixed medium according to the mixed density ρ mix, the average air density ρ g and the liquid density ρ l (constant); correcting the total mass flow Qm by the mass liquid content etam of the mixed medium, the average pressure P in the measuring pipeline and the medium temperature T to obtain the total mass flow Qm'; and finally, calculating the gas mass flow Qg and the liquid mass flow Ql according to the mass liquid-containing rate etam and the total mass flow Qm'. The gas-liquid two-phase flow is obtained through calculation of the wet gas flow meter 71 and a metering mode, and the influence of a small amount of liquid-phase medium mixed in the gas-phase medium on the gas-phase flow measurement precision is reduced or even eliminated, so that the calibration precision is improved.

Referring to fig. 5 and 6, in order to reduce the liquid content of the gas-phase medium entering the moisture meter 71, the demister 3 is used for secondary separation of the gas-phase medium mainly comprising gas after gas-liquid separation, and in order to ensure the separation effect of the demister 3, the demister 3 is provided with a plurality of collision separation plates 34 (shown as 3 in the figure) for separating the gas-phase medium and the liquid-phase medium at intervals along the transmission direction thereof, and it is preferable in this application that the demister 3 is horizontally arranged, that is, the axis of the demister 3 is horizontally arranged.

Referring to fig. 6 and 7, the collision separating plate 34 is provided with a plurality of rows of collision portions 341 at intervals in the height direction thereof, and the collision portions 341 include a plurality of ventilation holes 3411 horizontally spaced apart; after the gas-phase medium enters the demister 3, the gas-phase medium flows along the length direction of the demister 3 and sequentially contacts and collides with the 3 collision separation plates 34 in the flowing process, the gas-phase medium enters the transmission rear end of the collision separation plate 34 from the transmission front end of the collision separation plate 34 through the air holes 3411 corresponding to the collision separation plate 34, meanwhile, when the gas-phase medium collides with the collision separation plate 34, the liquid-phase medium mixed in the gas-phase medium can be attached to the collision separation plate 34 to realize gas-liquid separation, and the liquid-phase medium attached to the collision separation plate 34 drops downwards under the action of gravity.

Referring to fig. 6 and 7, in order to improve the collision effect between the medium flowing through the demister 3 and the collision separating plate 34, the collision part 341 further includes guide plates 3412 disposed at the upper ends of the air holes 3411 in a one-to-one correspondence, and the guide plates 3412 are used to block the air holes 3411. The guide plate 3412 is disposed on the side of the collision separation plate 34 away from the gas passage pipe 23, and one end of the guide plate 3412 away from the gas vent 3411 is inclined downward, so that when the gas-phase medium passes through the gas vent 3411, the gas-phase medium collides with the guide plate 3412 to increase the contact area between the medium and the collision separation plate 34, thereby improving the gas-liquid separation effect. Meanwhile, in order to increase the collision time of the gas-phase medium in the demister 3, the collision portions 341 of two adjacent collision separation plates 34 are arranged in a staggered manner at intervals from top to bottom, so that the circulation distance of the gas-phase medium through the two collision separation plates 34 is increased. The demister 3 is arranged below the collision separation plate 34 and is provided with a communicating pipe 9 communicated with the liquid storage tank 4, and the liquid-phase medium separated by the collision separation plate 34 flows back into the liquid storage tank 4 through the communicating pipe 9 so as to ensure the calibration precision of the calibration device.

Referring to fig. 5 and 6, in the oil gas well collection development process, there may be some particulate matter impurity like sand grain etc. and follow the medium and get into collection pipeline even calibration device under high-pressure draught's drive, cause the damage of wet gas flowmeter 71 when passing through wet gas flow metering unit 7 for preventing particulate matter impurity, the defroster 3 is located the one end that the wet gas flow metering unit 7 was kept away from to collision separator 34 and is equipped with filter plate 35, filter plate 35 is latticed, filter particulate matter impurity, when preventing that particulate matter impurity from causing the damage to wet gas flowmeter 71, reduce the influence of particulate matter impurity to collision separator 34.

Referring to fig. 3 and 5, in order to conveniently take out the particulate impurities filtered by the filter screen plate 35, the demister 3 includes a front-end tank shell 31 connected to the gas path pipe 23 and a rear-end tank shell 32 connected to the moisture flow metering assembly 7, the rear-end tank shell 32 and the front-end tank shell 31 are provided with flanges 33, and the front-end tank shell 31 and the rear-end tank shell 32 are detachably and hermetically connected through the flanges 33. The collision separation plate 34 and the filter screen plate 35 are fixedly installed in the rear end tank shell 32, the filter screen plate 35 is installed at one end, far away from the wet gas flow metering assembly 7, of the rear end tank shell 32, and when particulate impurities are required to be cleaned, the flange 33 on the front end tank shell 31 and the rear end tank shell 32 is detached to take out the particulate impurities in the demister 3.

Referring to fig. 5, one end of the liquid storage tank 4 is communicated with the liquid path pipe 24, one end of the liquid storage tank 4, which is far away from the liquid path pipe 24, is connected with the mass flow metering assembly 8, the mass flow metering assembly 8 includes two sets of mass flow meters 81 with different calibers and two valves 82 respectively arranged at inlets of the mass flow meters 81, and the valves 82 are used for controlling the mass flow meters 81 connected with the valves to be communicated or cut off with the liquid storage tank 4. In the application, the mass flowmeter 81 adopts a Coriolis mass flowmeter, and when the flow entering the liquid pipeline 24 is large, the mass flowmeter 81 with a large caliber is adopted to meet the requirement of large-flow measurement; when the flow rate into the liquid passage pipe 24 is small, the mass flow meter 81 having a small diameter is used to satisfy the small flow rate measurement. In the calibration process, when the medium flow in the liquid path pipe 24 changes, only the valve 82 connected to the mass flow meter 81 with the corresponding required caliber needs to be opened, and the valve 82 of the originally conducted and metered mass flow meter 81 is closed, so that the mass flow metering component 8 can realize continuous and accurate metering.

Referring to fig. 5, the mass flow meter 81 is connected with a liquid phase flow metering module corresponding thereto, and the gas phase flow metering module 712 and the liquid phase flow metering module are connected with a multi-phase flow computer or MFC system (not shown). In the application, a multiphase flow computer is adopted and is also connected with a multiphase flow meter system or an MPFM of an original metering device at a wellhead, when a gas phase medium and a liquid phase medium respectively pass through a wet gas flow meter 71 and a mass flow meter 81, the wet gas flow meter 71 and the mass flow meter 81 respectively perform real-time gas phase and liquid phase metering on the respective medium, respectively obtain liquid phase mass flow and gas phase mass flow, and perform real-time comparison and calibration on data through the multiphase flow computer.

Referring to fig. 5, a solenoid valve 41 is arranged between the liquid storage tank 4 and the mass flow metering assembly 8, and the liquid medium can be buffered in the liquid storage tank 4 by opening and closing the solenoid valve 41, so that the input gas-liquid ratio and the output gas-liquid ratio are buffered, and a relatively stable flow pattern is formed. The liquid storage tank 4 is provided with a liquid level meter 43, the liquid level meter 43 is electrically connected with the multiphase flow computer, and the liquid level meter 43 is used for measuring the differential pressure formed by the liquid in the liquid storage tank 4; the liquid level meter 43 transmits the measurement signal to the multiphase flow computer, and the multiphase flow computer controls the opening and closing of the solenoid valve 41 by measuring the data of the wet gas flow meter 71. In order to prevent the calibration device from being incapable of being used normally due to the failure of the electromagnetic valve 41, a manual valve 42 which is parallel to the electromagnetic valve 41 is arranged between the liquid storage tank 4 and the mass flow metering assembly 8, and the manual valve 42 or the electromagnetic valve 41 is selected to be controlled according to the actual use condition, so that the mass flow metering assembly 8 can realize continuous and normal metering work.

Referring to fig. 5 and 8, the communicating pipe 9 communicates the demister 3 and the liquid storage tank 4, liquid phase media which are collided and filtered out in the demister 3 are guided into the liquid storage tank 4, and simultaneously, in the flowing process of the liquid phase media in the liquid storage tank 4, gas phase media mixed with the liquid phase media rise to the upper end of the liquid storage tank 4 along with the flowing of the liquid phase media and enter the demister 3 through the communicating pipe 9, so that the metering accuracy of the gas phase media and the liquid phase media is improved.

Referring to fig. 8 and 9, the communicating pipe 9 includes a connecting pipe 91 of the sealed connection liquid storage tank and a liquid phase return pipe 92 of the sealed connection demister, the connecting pipe 91 is connected with the liquid phase return pipe 92 in an inserting manner, and the axis of the connecting pipe 91 coincides with the axis of the liquid phase return pipe 92, the diameter of the liquid phase return pipe 92 is smaller than that of the connecting pipe 91, a plurality of gas-liquid separation plates 93 (shown as 3 in the figure) for separating gas phase media and liquid phase media are fixedly arranged inside the connecting pipe 91, the liquid phase return pipe 92 penetrates through the gas-liquid separation plates 93, and is fixedly connected with the gas-liquid separation plates 93, thereby ensuring the installation stability.

Referring to fig. 9 and 10, the gas-liquid separating plate 93 and the collision separating plate 34 have the same structure, the diameter of the gas-liquid separating plate 93 is perpendicular to the axis of the liquid phase return pipe 92, a plurality of rows of filtering parts 931 are arranged at intervals along any diameter direction of the gas-liquid separating plate 93, each filtering part 931 comprises a plurality of through holes 9311 distributed at intervals and collision plates 9312 arranged above the through holes 9311 in a one-to-one correspondence manner, and when a gas-phase medium collides with the gas-liquid separating plate 93, the liquid-phase medium entrained in the gas-phase medium contacts with the gas-liquid separating plate 93 and adheres to the gas-liquid separating plate 93. Meanwhile, in order to increase the collision time between the medium and the gas-liquid separation plates 93, the filtering parts 931 on two adjacent gas-liquid separation plates 93 are arranged in a staggered manner along the arrangement direction of the filtering parts 931, so that the circulation distance of the gas-phase medium passing through the two gas-liquid separation plates 93 is prolonged, and the gas-phase medium recovered into the demister 3 is filtered and dehumidified.

Referring to fig. 9 and 11, in order to ensure that the gaseous medium in the liquid storage tank 4 can be introduced into the demister 3, the length of the connecting pipe 91 is smaller than the length of the liquid phase return pipe 92, when the connecting pipe 91 does not reach the demister 3, the top of the connecting pipe 91 is sealed and fixed with the liquid phase return pipe 92, a plurality of air return holes 921 are formed in the liquid phase return pipe 92 between the top of the connecting pipe 91 and the gas-liquid separation plate 93, and the gaseous medium in the connecting pipe 91 enters the liquid phase return pipe 92 through the air return holes 921 and enters the demister 3 along the liquid phase return pipe 92.

Referring to fig. 11, the output pipe 6 is provided with a gas return pipe 62 and a liquid return pipe 63, wherein one end of the gas return pipe 62 far away from the output pipe 6 is communicated with one end of the wet gas flow metering assembly 7 far away from the demister 3, and one end of the liquid return pipe 63 far away from the output pipe 6 is communicated with one end of the mass flow metering assembly 8 far away from the liquid storage tank 4, so that the separated gas-phase medium and liquid-phase medium are mixed in the output pipe 6 again and then flow into the collection and delivery pipeline again through the output pipe 6.

Referring to fig. 11 and 12, after calibration of the calibration device is completed, air pollution caused by media remaining in the calibration device is prevented, a first stop valve 51 is arranged on an input pipe 5, a second stop valve 61 is arranged on an output pipe 6, the first stop valve 51 and the second stop valve 61 are opened and closed synchronously with an input stop valve 1003 and an output stop valve 1004, and when calibration detection is required, after the input pipe 5 and the output pipe 6 are respectively connected with an output branch pipe 1001 and an input branch pipe 1002, the first stop valve 51, the second stop valve 61, the input stop valve 1003 and the output stop valve 1004 are opened, and a conduction stop valve 1005 is closed synchronously; after the calibration detection is finished, the first stop valve 51, the second stop valve 61, the input stop valve 1003 and the output stop valve 1004 are closed at the same time, and the conduction stop valve 1005 is opened synchronously, so that the calibration collection is not influenced mutually. The provision of the first stop valve 51 and the second stop valve 61 simultaneously ensures that the calibration device does not need to be emptied when it is used again.

The implementation principle of the mobile wellhead flow calibration device in the embodiment of the application is as follows: the calibration device is transported to a corresponding oil and gas well site by moving the transport vehicle, the input pipe 5 is in butt-joint sealing connection with the output branch pipe 1001 and the output pipe 6 is in butt-joint sealing connection with the input branch pipe 1002, then the first stop valve 51, the second stop valve 61, the input stop valve 1003 and the output stop valve 1004 are simultaneously opened, and the conducting stop valve 1005 is synchronously closed. The medium enters the gas-liquid separator 2 through the input pipe 5, an inverted cone vortex field is formed under the action of centrifugal force and gravity, the gas-phase medium rises to the top of the gas-liquid separator 2 along the center of a vortex, enters the demister 3 through the gas path pipe 23, the liquid-phase medium flows into the liquid path pipe 24 at the lower end of the gas-liquid separator 2 along the spiral flow guide body 22 and is discharged into the liquid storage tank 4, the gas-phase medium in the demister 3 collides with the collision separation plate 34 and then filters the liquid-phase medium carried by the collision separation plate, the liquid-phase medium flows into the liquid storage tank 4 along the communicating pipe 9, and the gas-phase medium separated from the liquid-phase medium in the liquid storage tank 4 in the. The separated gas phase medium and liquid phase medium respectively enter the wet gas flowmeter 71 and the mass flowmeter 81 for metering, then are converged and enter a production pipeline through the output pipe 6, and meanwhile, the metering data is compared with the multiphase flowmeter through the multiphase flow computer, so that the multiphase flowmeter is calibrated in an on-line real-time metering manner.

The embodiment of the application also discloses a calibration method of the mobile wellhead flow device. Referring to fig. 13, the calibration method includes the steps of:

the method comprises the following steps: when a calibration measurement is to be made,

step a, the input pipe 5 and the output pipe 6 are respectively communicated with the acquisition and delivery pipeline in a butt joint way.

And step b, simultaneously opening the first stop valve 51, the second stop valve 61, the output stop valve 1004 and the input stop valve 1003, and synchronously closing the conduction stop valve 1005, so that the original collection conveying pipeline is interrupted under the action of the conduction stop valve 1005, and the medium flows into the calibration device from the output branch pipe 1001 and flows back into the collection conveying pipeline again through the input branch pipe 1002 after being calibrated by the calibration device.

And c, allowing the medium to enter a gas-liquid separator 2 through an input pipe 5, and performing gas-liquid separation to obtain a gas-phase medium mainly comprising gas and a liquid-phase medium mainly comprising liquid.

Specifically, after the medium enters the gas-liquid separator 2, the medium forms an inverted cone-shaped vortex field under the guidance of the spiral guide plate and the action of centrifugal force and gravity, the gas-phase medium rises to the top of the gas-liquid separator 2 along the center of the vortex, enters the demister 3 through the gas path pipe 23, and the liquid-phase medium flows into the liquid path pipe 24 at the lower end of the gas-liquid separator 2 along the spiral guide body 22 and is discharged into the liquid storage tank 4.

And d, the gas-phase medium enters the demister 3 and is conveyed to the output pipe 6 along the demister 3, the gas-phase medium collides and contacts with the collision separation plate 34 in the demister 3, and liquid in the gas-phase medium contacts with the collision separation plate 34 and flows into the liquid storage tank 4 through the communicating pipe 9.

Specifically, when the gas-phase medium contacts with the collision separation plate 34, the liquid in the gas-phase medium adheres to the surface of the collision separation plate 34 and slides downwards along the surface of the collision separation plate 34 under the action of gravity, converges at the bottom of the demister 3, flows into the liquid storage tank 4 under the conduction of the communicating pipe 9,

and e, the liquid phase medium enters the liquid storage tank 4 and is conveyed towards the output pipe 6, and when the liquid phase medium flows in the liquid storage tank 4, gas in the liquid phase medium rises and enters the demister 3 through the communicating pipe 9.

Specifically, in the flowing process of the liquid phase medium, the gas mixed with the liquid phase medium is discharged, the gas is lifted upwards because the gas of the petroleum gas is lighter than the air, in the lifting process of the gas, the gas is filtered again by the gas-liquid separating plate 93 to remove moisture in the gas, and the gas separated by the gas-liquid separating plate 93 continuously rises through the air return hole 921 to enter the demister 3.

And step d and step e are not sequenced and are synchronously carried out.

And f, the gas-phase medium enters a wet gas flow metering component 7, and the wet gas flow metering component 7 performs mass flow metering of various items on the gas-phase medium and the liquid-phase medium flowing through the wet gas flow metering component.

Specifically, after the gas-phase medium enters the wet gas flow meter measuring assembly 7, when the liquid content in the gas-phase medium is less than 3%, the influence of the liquid content on the measuring accuracy of the wet gas flow meter 71 can be ignored, and the gas phase and the liquid phase in the medium are both subjected to flow measurement by high-accuracy measurement in one step, so that the measuring accuracy is ensured.

And step g, the liquid phase medium enters the mass flow metering assembly 8, and the mass flow metering assembly 8 performs mass flow metering on the gas-liquid two-phase medium flowing through the mass flow metering assembly.

Specifically, after the liquid-phase medium enters the mass flow metering assembly 8, when the gas content in the liquid-phase medium is less than 3%, the influence of the gas content on the metering accuracy of the mass flow meter 81 can be ignored, so that high-accuracy metering is realized.

And step f and step g are not sequentially performed and are synchronously performed.

And h, converging the liquid-phase medium and the gas-phase medium in an output pipe 6 and then flowing back to the acquisition and conveying pipeline.

Step two: when the calibration measurement is finished, the calibration measurement is carried out,

step A, simultaneously closing the first stop valve 51, the second stop valve 61, the output stop valve 1004 and the input stop valve 1003, synchronously opening the conduction stop valve 1005, conducting the original acquisition and conveying pipeline again at the moment, closing a passage between the acquisition and conveying pipeline and the calibration device, and conveying media along the acquisition and conveying pipeline.

And B, removing the input pipe 5 and the output pipe 6 from the collecting and conveying pipeline.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a remove wellhead flow calibration device which characterized in that: the device comprises a gas-liquid separator (2) communicated with a collecting and conveying pipeline, a demister (3) communicated with the gas-liquid separator (2) and a liquid storage tank (4), wherein the output end of the demister (3) is connected with a wet gas flow metering component (7), and the output end of the liquid storage tank (4) is connected with a mass flow metering component (8);

the gas-liquid separator (2) is used for separating the medium into a gas-phase medium mainly comprising gas and a liquid-phase medium mainly comprising liquid;

the demister (3) is used for secondary separation of gas-phase media after gas-liquid separation;

the liquid storage tank (4) is positioned below the gas-liquid separator (2) and is used for storing liquid phase media;

the wet gas flow metering assembly (7) is used for measuring the mass flow of the wet gas mainly comprising a gas medium;

the mass flow metering component (8) is used for measuring the mass flow of a liquid phase mainly comprising a liquid medium.

2. The mobile wellhead flow calibration device according to claim 1, characterized in that: the wet gas flow metering assembly (7) comprises two sets of wet gas flow meters (71) with different calibers and two check valves (72) which are respectively arranged at inlets of the wet gas flow meters (71), wherein the check valves (72) are used for controlling the connection or disconnection of the wet gas flow meters (71) connected with the check valves and the demisters (3); the mass flow metering component (8) comprises two sets of mass flow meters (81) with different calibers and two valves (82) which are respectively arranged at inlets of the mass flow meters (81), and the valves (82) are used for controlling the mass flow meters (81) connected with the valves to be communicated or cut off with the liquid storage tanks (4).

3. The mobile wellhead flow calibration device according to claim 1, characterized in that: gas-liquid separator (2) include casing (21) and vertical spiral set up in inside spiral baffle (22) of casing (21), the axis coincidence of the axis of spiral baffle (22) and casing (21), the lateral wall and casing (21) inner wall sealing connection of spiral baffle (22), the entrance of gas-liquid separator (2) sets up in spiral baffle (22) top.

4. A mobile wellhead flow calibration device as claimed in claim 3, wherein: the gas-liquid separator (2) is characterized in that a gas path pipe (23) communicated with a demister is arranged in the center of the top of the gas-liquid separator (2), the center of the end part of one end, connected with the shell (21), of the gas path pipe (23) is located on the axis of the shell (21), and the distance between the side wall, close to the axis of the shell (21), of the spiral flow guide body (22) and the axis is smaller than or equal to the radius of the gas path pipe (23), so that the spiral flow guide body (22) forms a gas guide hole (221) aligned with the gas path pipe (23).

5. The mobile wellhead flow calibration device according to claim 1, characterized in that: the demister (3) is provided with a plurality of collision separation plates (34) for separating gas-phase media and liquid-phase media at intervals along the transmission direction of the demister, the collision separation plates (34) are provided with a plurality of rows of collision parts (341) at intervals, and each collision part (341) comprises a plurality of air holes (3411) distributed horizontally at intervals.

6. The mobile wellhead flow calibration device according to claim 5, characterized in that: the collision part (341) further comprises guide plates (3412) which are arranged on one side of the air holes (3411) in a one-to-one correspondence mode, the guide plates (3412) are arranged on one side, away from the gas-liquid separator (2), of the collision separation plate (34), and the guide plates (3412) are used for shielding the air holes (3411).

7. The mobile wellhead flow calibration device according to claim 6, characterized in that: the collision parts (341) on two adjacent collision separation plates (34) are arranged in a staggered mode at intervals.

8. The mobile wellhead flow calibration device according to claim 5, characterized in that: the demister (3) is horizontally arranged above the liquid storage tank (4) along the transmission direction of the demister, and a communicating pipe (9) communicated with the liquid storage tank (4) is arranged below the collision separation plate (34) of the demister (3).

9. The mobile wellhead flow calibration device according to claim 8, characterized in that: the communicating pipe (9) comprises a connecting pipe (91) which is hermetically connected with the liquid storage tank (4) and a liquid phase return pipe (92) which is hermetically connected with the demister (3), the liquid phase return pipe (92) and the connecting pipe (91) are mutually spliced and communicated, the diameter of the liquid phase return pipe (92) is smaller than that of the connecting pipe (91), and the liquid phase return pipe (92) at one end, far away from the liquid storage tank (4), of the connecting pipe (91) is hermetically connected; the gas-liquid separation board (93) that the inside fixed polylith that is equipped with of connecting pipe (91) is used for separating gaseous phase medium and liquid phase medium, liquid phase back flow (92) run through gas-liquid separation board (93) and with gas-liquid separation board (93) fixed connection, liquid phase back flow (92) are located and are equipped with a plurality of return vents (921) between connecting pipe (91) top and gas-liquid separation board (93).

10. The mobile wellhead flow calibration device according to claim 5, characterized in that: and a filter screen plate (35) is arranged in the demister (3).

11. A mobile wellhead flow calibration device as claimed in claim 10, wherein: demister (3) includes front end tank shell (31) and rear end tank shell (32), be equipped with flange (33) between front end tank shell (31) and rear end tank shell (32), rear end tank shell (32) are connected with humid air flow metering unit (7), filter plate (35) set up in rear end tank shell (32) keep away from the one end of humid air flow metering unit (7).

12. The mobile wellhead flow calibration device according to claim 1, characterized in that: be equipped with solenoid valve (41) between liquid storage pot (4) and mass flow meter subassembly (8), be equipped with level gauge (43) on liquid storage pot (4), level gauge (43) are connected with solenoid valve (41) electricity.

13. A mobile wellhead flow calibration device as claimed in claim 12, wherein: a manual valve (42) is arranged between the liquid storage tank (4) and the mass flow metering assembly (8), and the manual valve (42) and the electromagnetic valve (41) are arranged in parallel.

14. The mobile wellhead flow calibration device according to claim 1, characterized in that: still include sled dress base (1), vapour and liquid separator (2), defroster (3), liquid storage pot (4), wet gas flow meter measurement subassembly (7) and mass flow meter subassembly (8) are all installed on sled dress base (1), sled dress base (1) is used for packing into the mobile transport vehicle.