Weighing type flow metering device

Abstract

The utility model discloses a weighing type flow metering device, which is used for metering liquid flow in two modes of weighing and volume, realizes double metering, not only obviously improves the accuracy of data, but also effectively avoids the interference of gas-liquid mixing on a traditional flow meter. Especially under the conditions of low oil extraction flow velocity and small flow, a traditional flow meter often generates large errors due to flow velocity fluctuation or gas mixing, and the device can ensure the metering stability and accuracy. In addition, a closed tank body design is adopted, gas and liquid are separated through an internal gas-liquid separation device, and gas pressure in the tank is guided back to a pipeline again by utilizing a gas internal circulation mechanism. By means of the design, the gas discharging problem in the liquid discharging process is solved, environmental pollution caused by direct gas discharging is effectively prevented, and meanwhile the safety risk caused by overpressure in the tank body is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the oil field oil production field, specifically, relate to a weighing formula flow metering device. BACKGROUND

[0002] At present, the oil field oil production industry has significant deficiencies in single well monitoring, especially in the oil field environment in China, this problem is particularly prominent. Because the oil well crude oil content is generally low, and the gas-liquid mixing ratio is high, the oil production flow is small, and the existing flow meter is difficult to provide accurate measurement data under such complex working conditions. The traditional flow meter is easily disturbed by gas under the condition of gas-liquid mixing, resulting in large liquid flow measurement error. In addition, although multi-well combined measurement can obtain overall production data, it hides the differences between single wells, making it difficult for managers to grasp the specific production performance of each well. This mode not only cannot identify low-efficiency wells or abnormal wells in time, but also affects the single well production optimization, and may lead to unreasonable resource allocation, further aggravating the invalid production and resource waste.

[0003] Therefore, the utility model is provided. CONTENT OF THE UTILITY MODEL

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art, and provide a weighing formula flow metering device, which solves the problems raised in the background.

[0005] To solve the above technical problems, the basic idea of the technical scheme of the utility model is:

[0006] A weighing formula flow metering device, comprising: at least two oil storage tank units, each oil storage tank unit comprising an oil storage tank, a support with weighing function, an automatic pressure relief valve, a liquid level detection device and a connecting pipe;

[0007] The two oil storage tanks are divided into A tank and B tank, A tank and B tank are connected in parallel through pipeline, and an automatic pressure relief valve is arranged at the top of A tank and B tank for releasing the gas pressure in the tank; A tank and B tank are respectively installed on the support with weighing function, for real-time measurement of the weight of the liquid in the tank; the liquid level detection device is installed in A tank and B tank for monitoring the liquid level height in the tank, and A tank and B tank are connected through the gas pipe for balancing the pressure between the two tanks.

[0008] A weighing formula flow metering device further comprises a liquid inlet branch pipe, the liquid outlet of the liquid inlet branch pipe is provided with a three-way valve, the liquid outlets at the upper and lower ends of the three-way valve are both communicated with liquid outlet pipes, and the liquid outlets of the two liquid outlet pipes are communicated with the liquid inlets of A tank and B tank respectively, for controlling the liquid to flow into A tank or B tank.

[0009] The weighing type flow metering device also comprises a liquid outlet branch pipe, and the liquid outlets of the A tank and the B tank are communicated with the liquid outlet branch pipe, and the liquid outlet branch pipes are respectively provided with electromagnetic valves A and electromagnetic valves B.

[0010] Optionally, the end of the liquid inlet of the liquid inlet branch pipe is provided with a connecting branch pipe, the connecting branch pipe is provided with an electromagnetic valve C, and the liquid outlet of the connecting branch pipe is communicated with the liquid outlet of the liquid inlet branch pipe.

[0011] Optionally, the liquid level detection device is in contact with the liquid in the tank.

[0012] Optionally, the gas of the B tank enters the A tank through the gas pipe, and the liquid in the A tank is discharged through the electromagnetic valve; when the three-way valve is switched to the liquid inlet of the A tank, the gas of the A tank enters the B tank through the gas pipe, and the liquid in the B tank is discharged through the electromagnetic valve.

[0013] After the above technical scheme is adopted, the utility model has the following beneficial effects compared with the prior art, of course, any product implementing the utility model does not necessarily need to achieve all the advantages described below:

[0014] The utility model measures the liquid flow by two ways of weighing and volume, realizes double measurement, significantly improves the accuracy of data, and effectively avoids the interference of gas-liquid mixing on the traditional flow meter. Especially in the case of low oil extraction flow rate and small flow, the traditional flow meter often produces large errors due to flow rate fluctuation or gas mixing, but the device can ensure the stability and accuracy of measurement. In addition, the closed tank body design is adopted, the gas and liquid are separated through the internal gas-liquid separation device, and the gas pressure in the tank is redirected back to the pipeline by using the gas internal circulation mechanism. This design not only solves the problem of gas discharge during liquid discharge, but also effectively prevents environmental pollution caused by direct gas discharge, and reduces the safety risk caused by overpressure in the tank body. The device is particularly suitable for the scene of small single-well oil extraction flow, can accurately count the oil extraction volume of each oil well, provides reliable data support for production management, improves the overall production efficiency, avoids invalid production and resource waste.

[0015] The specific embodiments of the utility model will be described in further detail below in combination with the drawings. DRAWINGS

[0016] The drawings in the following description are only some embodiments, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the drawings. In the drawings,

[0017] In the drawings:

[0018] Fig. 1 It is a perspective view of the flow metering device.

[0019] Fig. 2 is a front view of the flow metering device;

[0020] Fig. 3 is a side view of the flow metering device.

[0021] In the drawings, the components represented by the respective reference numerals are listed as follows:

[0022] 1, oil storage tank; 2, support with weighing function; 3, automatic pressure relief valve; 4, liquid level detection device; 5, connecting pipe; 6, liquid inlet branch pipe; 7, three-way valve; 8, liquid outlet pipe; 9, liquid discharge pipe; 10, electromagnetic valve A; 11, electromagnetic valve B; 12, liquid outlet branch pipe; 13, connecting branch pipe; 14, electromagnetic valve C.

[0023] It should be noted that these drawings and written descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0024] The present application will now be further described in detail with reference to the accompanying drawings.

[0025] Please refer to Figs. 1-3 shown, a weighing type flow metering device is provided in the present embodiment, which comprises at least two oil storage tank units, each of which comprises an oil storage tank 1, a support with weighing function 2, an automatic pressure relief valve 3, a liquid level detection device 4 and a connecting pipe 5;

[0026] The two oil storage tanks 1 are divided into A tank and B tank, which are connected in parallel through pipelines, and an automatic pressure relief valve 3 is provided at the top of each of the A tank and the B tank for releasing the gas pressure in the tank; the A tank and the B tank are respectively installed on the support with weighing function 2 for real-time measurement of the weight of the liquid in the tank; the liquid level detection device 4 is installed in the A tank and the B tank for monitoring the liquid level height in the tank, and the A tank and the B tank are connected through an air pipe for balancing the pressure between the two tanks. The support with weighing function 2 uses a weighing scale for weighing.

[0027] A weighing type flow metering device further comprises a liquid inlet branch pipe 6, the liquid outlet of which is provided with a three-way valve 7, the liquid outlets at the upper and lower ends of the three-way valve 7 are both communicated with a liquid outlet pipe 8, and the liquid outlets of the two liquid outlet pipes 8 are respectively communicated with the liquid inlets of the A tank and the B tank for controlling the liquid to flow into the A tank or the B tank. By providing the three-way valve 7, the liquid can be flexibly controlled to flow into the A tank or the B tank, realizing the alternating work of the two tanks and ensuring the continuity and efficiency of the oil extraction process. The configuration of the three-way valve 7 enables the device to flexibly distribute the liquid inlet path according to the actual flow demand, thereby avoiding the problems of flow interruption or inaccurate data caused by the work of a single tank.

[0028] The weighing type flow metering device further comprises a liquid outlet branch pipe 12, the liquid outlet of the A tank and the B tank are communicated with the liquid discharge pipes 9, the electromagnetic valve A 10 and the electromagnetic valve B 11 are arranged at the two liquid discharge pipes 9 respectively, and the liquid outlets of the electromagnetic valve A 10 and the electromagnetic valve B 11 are communicated with the liquid outlet branch pipe 12. The electromagnetic valve A 10 and the electromagnetic valve B 11 arranged on the liquid outlet pipe 8 of each tank can accurately control the liquid outlet path. This design not only helps to optimize the liquid outlet process, but also can adjust the discharge amount and flow rate of the liquid through the electromagnetic valve when switching between different tanks, thereby improving the flexibility and adaptability of the overall device.

[0029] In this embodiment, the end of the liquid inlet of the liquid inlet branch pipe 6 is provided with a connecting branch pipe 13, the connecting branch pipe 13 is provided with an electromagnetic valve C 14, and the liquid outlet of the connecting branch pipe 13 is communicated with the liquid outlet of the liquid outlet branch pipe 12. The liquid flow path is switched through the connecting branch pipe 13 and the electromagnetic valve C 14 to ensure the continuity of the device operation. In addition, this design provides more operation options under special working conditions, enhances the safety and fault tolerance of the device.

[0030] In this embodiment, the liquid level detection device 4 is in contact with the liquid in the tank. The liquid level detection device 4 directly contacts the liquid, which can monitor the liquid level in the tank in real time and accurately. This configuration can provide volume and mass information of the liquid in the tank in combination with the data of the weighing device, ensure multi-dimensional monitoring of the flow data, and help to improve the accuracy of metering.

[0031] In this embodiment, the gas of the B tank enters the A tank through the gas pipe, and the liquid in the A tank is discharged through the electromagnetic valve. When the three-way valve 7 is switched to the liquid inlet of the A tank, the gas of the A tank enters the B tank through the gas pipe, and the liquid in the B tank is discharged through the electromagnetic valve. The dynamic balance of the gas is realized through the gas pipe and the electromagnetic valve, and when one tank is filled with liquid, the other tank discharges liquid by using gas pressure. This design avoids the flow metering error caused by gas-liquid mixing, realizes gas circulation in the closed device, reduces the influence of external discharge on the environment, and improves the environmental protection and safety of the device.

[0032] In actual application, when the oil liquid pumped out by the oil well enters the weighing type flow metering device through the pipeline, Figs. 1-3The liquid is controlled by the three-way valve 7 to flow into the B tank first, and the A tank is closed. The two tanks are connected in parallel in the pipeline, and the pipeline where the electromagnetic valve C is located belongs to an emergency bypass and is normally closed. At this time, the electromagnetic valve C is closed, the electromagnetic valve A is opened, the liquid enters the B tank, the gas in the B tank enters the A tank through the gas pipe, enters the liquid outlet through the electromagnetic valve A, and when the B tank reaches the set weight or height, the three-way valve 7 is switched to flow the liquid into the A tank, and the B tank is closed. At this time, the electromagnetic valve A is closed, the electromagnetic valve B is opened, the gas generated in the A tank after the liquid enters enters the B tank through the gas pipe, so that the liquid in the B tank is pressed into the pipeline through the compressed gas entering through the electromagnetic valve B. At the same time, when the weight or volume of each tank reaches the set value, the pressure sensor and the liquid level measuring sensor transmit monitoring data to the data processor respectively, and the data is counted and stored, so that the flow of the liquid in the pipeline per unit time is calculated according to the data monitored by the weight and the liquid level sensor per unit time.

[0033] The utility model is not limited to the above-mentioned embodiment, anyone should know the structural change made under the inspiration of the utility model, and any technical scheme with the same or similar technical scheme of the utility model falls into the protection scope of the utility model. The utility model is not described in detail, and the technical, shape and structure part is the known technology.

Claims

1. A weighing-type flow metering device, characterized in that, It includes at least two oil storage tank units, each of which includes an oil storage tank (1), a support with weighing function (2), an automatic pressure relief valve (3), a liquid level detection device (4), and a connecting pipe (5); The two oil storage tanks (1) are divided into tank A and tank B. Tanks A and B are connected in parallel by pipelines. Automatic pressure relief valves (3) are installed on the top of both tanks A and B to release the gas pressure inside the tanks. Tanks A and B are respectively installed on brackets (2) with weighing function to measure the weight of the liquid inside the tanks in real time. Liquid level detection devices (4) are installed in tanks A and B to monitor the liquid level inside the tanks. Tanks A and B are connected by air pipes to balance the pressure between the two tanks.

2. The weighing-type flow metering device according to claim 1, characterized in that, It also includes an inlet branch pipe (6), and a three-way valve (7) is provided at the outlet of the inlet branch pipe (6). The outlets at both ends of the three-way valve (7) are connected to outlet pipes (8). The outlets of the two outlet pipes (8) are respectively connected to the inlets of tank A and tank B, and are used to control the flow of liquid into tank A or tank B.

3. The weighing-type flow metering device according to claim 1, characterized in that, It also includes a liquid outlet branch pipe (12). The liquid outlets of tank A and tank B are connected to a drain pipe (9). Solenoid valve A (10) and solenoid valve B (11) are respectively installed at the two drain pipes (9). The liquid outlets of solenoid valve A (10) and solenoid valve B (11) are connected to the liquid outlet branch pipe (12).

4. The weighing-type flow metering device according to claim 1, characterized in that, A connecting branch pipe (13) is provided at the end of the inlet of the inlet branch pipe (6). A solenoid valve C (14) is provided at the connecting branch pipe (13). The outlet of the connecting branch pipe (13) and the outlet of the outlet branch pipe (12) are connected.

5. A weighing-type flow metering device according to claim 1, characterized in that, The liquid level detection device (4) comes into contact with the liquid inside the tank.

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