Novel moisture combined flow metering device

Abstract

The utility model relates to a novel wet gas combined flow metering device which comprises a main pipeline and a meter head connected with the main pipeline, the extending direction of the main pipeline is consistent with the flow direction of wet gas, the two ends of the main pipeline are externally connected with gas production pipelines, and a vortex shedding flowmeter, a hollow connecting piece and a V-cone flowmeter which are of an L-shaped structure and are communicated in sequence are sequentially arranged in the main pipeline. The end, away from the hollow connecting piece, of the vortex shedding flowmeter penetrates out of the main pipeline. A sensor is arranged on the side wall of the vortex shedding flowmeter and comprises a temperature detection device, a pressure detection device and a vortex frequency signal device; a pressure pulsation signal extraction device used for extracting pressure pulsation signals of the main pipeline at the front end of the V-cone flowmeter and the inlet end of the V-cone flowmeter is arranged on the side wall of the main pipeline. The vortex shedding flowmeter and the V cone flowmeter are effectively connected to form an L-shaped two-phase flow metering structure, so that vortex frequency signals and pressure pulsation signals are extracted at the same time, and water-containing natural gas is effectively metered.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of gas field wellhead water-containing natural gas production on -line measurement, specifically relates to a V cone + vortex combined wet gas flow metering device. BACKGROUND

[0002] Yan'an gas field is located in northern Shaanxi, and there is free water in gas well gas production, under the liquid condition, during the natural gas metering process, the problem of inaccurate natural gas production metering and liquid metering exists universally. At present, the online wet gas metering at home and abroad mainly solves and calculates through the establishment of a mathematical model, mainly including three types, one is to adopt microwave, radio frequency to measure the water content, to establish a virtual high or low model for gas-liquid two-phase metering;Second, two different principle flowmeters are connected in series, a virtual high or low combined metering model is established for online solving and metering, including various combination forms such as differential pressure + differential pressure series connection, differential pressure + non-differential pressure series connection;Three is to use neural network, support vector machine and other regression algorithms to establish the nonlinear mapping of each phase flow and characteristic parameter, and to virtually measure the gas-liquid two-phase. Different online metering methods have certain application range. SUMMARY

[0003] The utility model aims at the above problem, proposes a new wet gas combined flow metering device with vortex flowmeter and V cone flowmeter in series.

[0004] The technical scheme of the utility model provides:

[0005] A novel wet gas combined flow metering device, including main pipeline and the table head connected with main pipeline, the extension direction of main pipeline is consistent with the direction of wet gas flow, both ends of main pipeline are externally connected with gas production pipeline, the L-shaped structure of vortex flowmeter, hollow connecting piece and V cone flowmeter in main pipeline is sequentially provided, one end of vortex flowmeter away from hollow connecting piece penetrates through main pipeline;The side wall of vortex flowmeter is provided with sensor, and the sensor includes temperature detection device, pressure detection device and vortex frequency signal device;The pressure fluctuation signal extraction device for extracting the pressure fluctuation signal of the front end of main pipeline and the inlet end of V cone flowmeter is arranged on the side wall of main pipeline.

[0006] The high pressure tapping port and low pressure tapping port are sequentially arranged on the side wall of main pipeline, the high pressure tapping port is located in front of the projection of V cone flowmeter on the side wall of main pipeline, and the first pressure sensor is arranged at the high pressure tapping port;The second pressure sensor is arranged at the low pressure tapping port, and the inlet end of V cone flowmeter is communicated through a pressure sensor pressure guide pipe.

[0007] The low pressure tapping port is located at the projection of the junction of vortex flowmeter and hollow connecting piece on the side wall of main pipeline.

[0008] The vortex flowmeter is a first hollow structure with a triangular or isosceles trapezoidal cross section, the hollow connector is a second hollow structure with a circular cross section, the first hollow structure and the second hollow structure are internally connected and provided with a pressure sensor pressure guide pipe, one end of the pressure sensor pressure guide pipe is communicated with an inlet end of the V-cone flowmeter, and the other end extends to a low-pressure pressure tapping port from the second hollow structure and the first hollow structure in sequence.

[0009] The temperature detection device is a temperature sensor, the pressure detection device is a third pressure sensor, and the vortex frequency signal device is a piezoelectric ceramic.

[0010] The vortex flowmeter is perpendicular to the direction of the wet gas flow, the hollow connector and the V-cone flowmeter are parallel to the direction of the wet gas flow, and the vortex flowmeter, the hollow connector and the V-cone flowmeter are sequentially connected to form an L-shaped structure.

[0011] Both ends of the main pipeline are connected with a gas pipeline through flanges.

[0012] The technical effect of the utility model lies in that:

[0013] (1) Compared with the ordinary throttling element, the V-cone of the V-cone flowmeter changes the throttling layout from the center hole throttling to the annular throttling, has the advantages of small pressure loss, not easy to block and wide measurement range; the vortex flowmeter has no movable parts in structure, small pressure loss, high reliability and long-term operation stability, is convenient to maintain during operation and has high measurement accuracy;

[0014] (2) The utility model fully utilizes the virtual low characteristic of the vortex flowmeter and the virtual high characteristic of the V-cone flowmeter in wet gas measurement, effectively connects the vortex flowmeter and the V-cone flowmeter through a hollow connector, forms an L-shaped two-phase flowmeter structure, simultaneously extracts the vortex frequency signal and the pressure fluctuation signal, and realizes effective measurement of the water-containing natural gas;

[0015] (3) The utility model simplifies the structure, is easy to process, small in size and convenient to install on site. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a front view of the novel wet gas combined flowmeter device.

[0017] Figure 2 It is a side view of the utility model.

[0018] The reference signs are as follows: 1, main pipeline; 2, vortex flowmeter; 3, V-cone flowmeter; 4, connector; 5, high-pressure pressure tapping port; 6, low-pressure pressure tapping port; 7, sensor; 8, meter head. DETAILED DESCRIPTION

[0019] Embodiment 1

[0020] A new type of wet gas combined flow metering device comprises a main pipeline 1 and a meter head 8 connected with the main pipeline 1, the extension direction of the main pipeline 1 is consistent with the direction of the wet gas flow, the two ends of the main pipeline 1 are externally connected with gas extraction pipelines, a vortex flow meter 2, a hollow connecting piece 4 and a V-cone flow meter 3 which are sequentially penetrated are arranged in the main pipeline 1 in sequence, and the end of the vortex flow meter 2 away from the hollow connecting piece 4 penetrates out of the main pipeline 1; a sensor 7 is arranged on the side wall of the vortex flow meter 2, and the sensor 7 comprises a temperature detection device, a pressure detection device and a vortex frequency signal device; a pressure fluctuation signal extraction device for extracting the pressure fluctuation signals of the front end of the main pipeline of the V-cone flow meter 3 and the inlet end of the V-cone flow meter 3 is arranged on the side wall of the main pipeline 1.

[0021] The specific implementation process of the embodiment is as follows:

[0022] 1. The two ends of the main pipeline 1 are respectively connected with the gas extraction pipelines, and checking, initialization and data correction and other operations are performed;

[0023] 2. The wet gas flow enters through the main pipeline 1, first flows through the vortex flow meter 2, the vortex flow meter 2 generates interference to the flow of the wet gas flow, regular vortices are alternately generated on the two sides of the vortex flow meter 2, a Karman vortex street signal is formed, and a vortex frequency signal is extracted by the vortex frequency signal device; then, the wet gas flow flows through the V-cone flow meter 3, and the pressure of the front end of the main pipeline of the V-cone flow meter 3 and the inlet end of the V-cone flow meter 3 is measured by the pressure fluctuation signal extraction device;

[0024] 3. The temperature in the main pipeline 1 is extracted by the temperature detection device, and the pressure in the main pipeline 1 is extracted by the pressure detection device;

[0025] 4. The vortex frequency signal, the pressure of the front end of the main pipeline of the V-cone flow meter 3 and the inlet end of the V-cone flow meter 3, the temperature and the pressure monitoring data are uploaded to the meter head 8, filtering, noise reduction, screening and other operations are performed, and the gas production and the liquid content rate of the gas well are calculated by the meter head 8.

[0026] Embodiment 2

[0027] Based on the embodiment 1, the following is further included:

[0028] The high-pressure tapping port 5 is located in front of the projection of the V-cone flowmeter 3 on the side wall of the main pipeline 1, and the first pressure sensor is arranged at the high-pressure tapping port 5. The low-pressure tapping port 6 is located at the projection of the junction of the vortex flowmeter 2 and the hollow connecting piece 4 on the side wall of the main pipeline 1. The vortex flowmeter 2 is a first hollow structure with a triangular or isosceles trapezoidal cross section, the hollow connecting piece 4 is a second hollow structure with a circular cross section, the first hollow structure and the second hollow structure are internally connected, and a pressure sensor pressure guide pipe is arranged therein, one end of the pressure sensor pressure guide pipe is connected to the inlet end of the V-cone flowmeter 3, and the other end extends from the second hollow structure, the first hollow structure to the low-pressure tapping port 6 in sequence.

[0029] That is, the first pressure sensor at the high-pressure tapping port 5 extracts the high-pressure end pressure of the main pipeline in front of the V-cone flowmeter 3, and the second pressure sensor at the low-pressure tapping port 6 extracts the low-pressure end pressure of the inlet end of the V-cone flowmeter 3 through the pressure sensor pressure guide pipe.

[0030] Embodiment 3

[0031] On the basis of embodiment 2, the temperature detection device is a temperature sensor, the pressure detection device is a third pressure sensor, and the vortex frequency signal device is a piezoelectric ceramic.

[0032] Embodiment 4

[0033] On the basis of embodiment 3, the temperature detection device is a temperature sensor, the pressure detection device is a third pressure sensor, and the vortex frequency signal device is a piezoelectric ceramic.

[0034] The vortex flowmeter 2 is perpendicular to the direction of the wet gas flow, the hollow connecting piece 4 and the V-cone flowmeter 3 are parallel to the direction of the wet gas flow, and the vortex flowmeter 2, the hollow connecting piece 4 and the V-cone flowmeter 3 are sequentially connected to form an L-shaped structure. Both ends of the main pipeline 1 are connected to the gas pipeline through flanges.

[0035] The specific implementation process of the embodiment is as follows:

[0036] 1. Connect both ends of the main pipeline 1 to the gas pipeline through flanges, and perform inspection, initialization and data correction operations;

[0037] 2. The wet gas flow enters through the main pipeline 1, first flows through the vortex flowmeter 2, and the vortex flowmeter 2 generates regular vortices on both sides alternately to form a Karman vortex street signal, and the piezoelectric ceramic extracts the vortex frequency signal; then, the wet gas flow flows through the V-cone flowmeter 3, the first pressure sensor measures the high-pressure end pressure of the V-cone flowmeter 3, and the second pressure sensor measures the low-pressure end pressure of the V-cone flowmeter 3.

[0038] 3. Extract the temperature in the main pipeline 1 by temperature sensor, extract the pressure in the main pipeline 1 by third pressure sensor;

[0039] 4. Upload the above vortex frequency signal, high pressure end pressure and low pressure end pressure, temperature, pressure monitoring data to the meter head 8, carry out filtering, noise reduction, screening and other operations, calculate the gas production and liquid content rate of the gas well through the meter head 8.

[0040] The utility model relates to device all are prior art, the model of vortex flowmeter 2 is SKLU -50, the model of V cone flowmeter 3 is LS - LGV.

Claims

1. A novel wet gas combined flow metering device, comprising a main pipeline (1) and a meter head (8) connected with the main pipeline (1), the extension direction of the main pipeline (1) is consistent with the direction of the wet gas flow, and gas gathering pipelines are connected to both ends of the main pipeline (1), characterized in that: The main pipeline (1) is provided with a vortex flowmeter (2), a hollow connecting piece (4) and a V-cone flowmeter (3) in sequence, the vortex flowmeter (2) is provided with a sensor (7) on the side wall, the sensor (7) comprises a temperature detection device, a pressure detection device and a vortex frequency signal device; the main pipeline (1) is provided with a pressure fluctuation signal extraction device for extracting the pressure fluctuation signals of the front end of the main pipeline and the inlet end of the V-cone flowmeter (3).

2. The novel wet gas combination flow metering device of claim 1, wherein: The main pipeline (1) is provided with a high-pressure tapping port (5) and a low-pressure tapping port (6) in sequence, the high-pressure tapping port (5) is located in front of the projection of the V-cone flowmeter (3) on the side wall of the main pipeline (1), and the high-pressure tapping port (5) is provided with a first pressure sensor; the low-pressure tapping port (6) is provided with a second pressure sensor, and the second pressure sensor is connected to the inlet end of the V-cone flowmeter (3) through a pressure sensor pressure guide pipe.

3. The new moisture combination flow metering device according to claim 2, characterized in that: The low-pressure tapping port (6) is located at the projection of the junction of the vortex flowmeter (2) and the hollow connecting piece (4) on the side wall of the main pipeline (1).

4. The new moisture combination flow metering device according to claim 3, characterized in that: The vortex flowmeter (2) is a first hollow structure with a triangular or isosceles trapezoidal cross section, the hollow connecting piece (4) is a second hollow structure with a circular cross section, the first hollow structure and the second hollow structure are connected in series and provided with a pressure sensor pressure guide pipe, one end of the pressure sensor pressure guide pipe is connected to the inlet end of the V-cone flowmeter (3), and the other end of the pressure sensor pressure guide pipe extends from the second hollow structure, the first hollow structure to the low-pressure tapping port (6) in sequence.

5. The new moisture combination flow metering device according to claim 1, characterized in that: The temperature detection device is a temperature sensor, the pressure detection device is a third pressure sensor, and the vortex frequency signal device is a piezoelectric ceramic.

6. The new moisture combination flow metering device of claim 1, wherein: The vortex flowmeter (2) is perpendicular to the direction of the moisture flow, the hollow connecting piece (4) and the V-cone flowmeter (3) are parallel to the direction of the moisture flow, and the vortex flowmeter (2), the hollow connecting piece (4) and the V-cone flowmeter (3) are connected in sequence to form an L-shaped structure.

7. The new moisture combination flow metering device according to claim 1, characterized in that: Both ends of the main pipeline (1) are connected to a gas pipeline through flanges.

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