The influence of the diameter of the oil droplet on the electromagnetic flow meter is larger than the diameter of the electromagnetic

Abstract: The influence information of the oil droplet diameter of the electromagnetic flowmeter meter is larger than the electromagnetic diameter is provided by the excellent flowmeter and flowmeter production and quotation manufacturers. Electromagnetic flowmeters are supplied in the petroleum industry. The interference of underground dead oil and groundwater makes the electrodes and meter heads of the electromagnetic flowmeter adhere to a thick layer. When the diameter of the oil droplet passing through the electromagnetic flowmeter is larger than the diameter of the electrode, due to the conductivity of the oil. More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following is the details of the influence of the oil droplet diameter of the electromagnetic flowmeter meter being larger than the electromagnetic diameter. Electromagnetic flowmeters are supplied in the petroleum industry. The interference of underground dead oil and groundwater makes the electrodes and meter heads of the electromagnetic flowmeter adhere to a thick layer. When the diameter of the oil droplet passing through the electromagnetic flowmeter is larger than the diameter of the electrode, Due to the extremely low conductivity of the oil, the electrode stops working instantaneously, resulting in measurement errors. Especially for the return overflow generated by the water well in the high pressure area, when the well contains high-viscosity crude oil and adheres to the surface of the measuring electrode, it will directly lead to the failure of logging. 1 Influence of suspended solids The fluid in the well contains suspended solids to varying degrees, especially for long-term water injection wells, the wall corrosion and scaling are more serious, under the implementation of various operating process measures, such as grinding, scraping, acidification, etc., It is easier to generate various metal substance particles. When the electromagnetic flowmeter is working, the particles suspended in the well fluid adhere to the electrode surface. If the conductivity of the adhesion layer is similar to the conductivity of the fluid, there will be no principle error, and the display value of the instrument can still be normal. , the output shows a negative deviation, and even can not work normally. If the adhesion layer is an insulating material, the impedance between the electrodes will increase or even open circuit, which will increase the error and even cannot work normally. 2 The effect of polymers on the flow calculation is related to the magnetic flux density. Different solutions have different electrical conductivities. Through experiments, it is found that the magnetic flux density of the polymer solution with the same magnetic field strength is lower than that of the water. The test instruments are calibrated in clean water, so the flow rate in wells with complex fluid properties will be smaller than that in clean water. 3 Influence of casing condition on electromagnetic flowmeter The flowmeter is calibrated in the standard size casing. In the actual construction on site, the water injection well is affected by injection pressure, water quality corrosion, long-term sealing, and the implementation of various technological measures. Cause casing deformation or serious corrosion and scaling, or even damage and other phenomena. Then, the flow conversion is carried out according to the standard size calibration value, which is bound to cause errors. Suppose the actual flow rate is Q, the measured flow rate is Q1, the diameter of the measurement channel during calibration is D, the cross-sectional area is S, the diameter of the measurement channel during logging is D1, the cross-sectional area is s1, and the flow rate is v. When the flow rate frequency value is measured by the flowmeter, it can be converted into flow rate according to the calibration chart. At this time, the standard over-current channel inner diameter is used for calculation, and the instantaneous measured flow rate should be: Q1 = S. V = . D2/4v When the overcurrent channel changes, the flow rate is: v= Q/s1= 4Q/7 [D12 therefore: Q1=S. v= D2v/4=( D2v/4)X4Q/(7cD12): It can be seen from QD2/D12 that there is a coefficient difference between the measured flow and the actual flow. This coefficient is proportional to the square of the change in the diameter of the measurement channel, which is an exponential relationship. When the difference between D and D1 is not large, the error between Ql and Q is not large. When the difference between D1 and D is large, Q1 exceeds the allowable error range, and the measurement error caused by the difference in pipe diameter is not considered in the actual electromagnetic flowmeter measurement and interpretation, which will affect the electromagnetic flow measurement method. make an impact. The above is the whole content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. 'Effects caused by the diameter of the oil droplet of the electromagnetic flow meter being larger than the diameter of the electromagnetic'

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