Flow Monitoring System of Electromagnetic Flow Meter

Abstract: The flow monitoring system information of the electromagnetic flowmeter is provided by the excellent flowmeter and flowmeter production and quotation manufacturers. The outlet flow rate of drilling fluid is the key parameter for judging the kick overflow at the drilling site. In order to realize safe, fast and economical drilling, it is particularly important to monitor the drilling fluid quantitatively, in real time and accurately. At present, it is generally monitored by the volume parameters of the integrated logging tool pool in China. More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following is the details of the flow monitoring system of the electromagnetic flowmeter. The outlet flow rate of drilling fluid is the key parameter for judging the kick overflow at the drilling site. In order to realize safe, fast and economical drilling, it is particularly important to monitor the drilling fluid quantitatively, in real time and accurately. At present, in China, the monitoring of the volume parameters of the integrated logging tool tank is generally used to observe, record and compare with manual timing to determine whether there is an accident such as overflow or lost circulation. This judging method has a low degree of automation and precision, cannot achieve quantitative detection, and finds overflow late. In recent years, new breakthroughs have been made in the quantitative monitoring technology of drilling fluid. Two types of equipment, mass flowmeter and electromagnetic flowmeter, have been introduced for quantitative monitoring of drilling fluid in the process of oil drilling. Although the mass flowmeter has the advantages of high measurement accuracy and good stability, it has disadvantages such as high price and complicated on-site installation. Therefore, electromagnetic flowmeters are currently used to quantitatively monitor the drilling fluid flow at the drilling site. The electromagnetic flowmeter is limited by the measurement principle. In order to ensure the measurement accuracy, the pipelines before and after the fluid flowing through the flowmeter need to meet the full pipe state, which limits the installation and use of the electromagnetic flowmeter. In addition, when the drilling fluid flow is large, the fixed The electromagnetic flowmeter under the pipe diameter will inhibit the passage of fluid, thus causing the backflow of drilling fluid and affecting the safe operation of drilling. In this paper, through the hydraulic simulation of the flow velocity field of the drilling fluid returning to the pipeline, the fluid flow law of the returning pipeline is analyzed, and the structure design of the outlet flow monitoring system is optimized. Therefore, it can meet the full pipe measurement condition of the electromagnetic flowmeter, improve the applicability and measurement accuracy of the flowmeter, realize the real-time and accurate monitoring of the drilling fluid outlet flow, and provide accurate early warning of overflow and drilling. Safe construction provides support and reduces damage to underground oil and gas formations from blowout and kill operations, thereby improving economic and social benefits and reducing environmental impact. 1 Current situation of overflow monitoring at home and abroad There are many methods for monitoring overflow at home and abroad, and the main research directions focus on micro-flow monitoring and pressure monitoring. In terms of micro-flow monitoring, we have successively developed wellhead conduit liquid level monitoring technology, drilling fluid flowmeter monitoring technology, improved flow monitoring technology, and pressure monitoring technology, including annular pressure measurement and monitoring technology while drilling, vertical casing pressure monitoring technology and acoustic wave monitoring. technology. Guo Yuanheng et al. comprehensively gave a comparative analysis of different overflow monitoring methods in terms of improved equipment and analysis types [1]. At present, the monitoring of complex situations such as overflow and well kick in China is generally carried out by the monitoring of the volume parameters of the drilling parameter instrument and the comprehensive logging instrument, and the manual timing observation, recording, and comparison to determine whether there is overflow or loss of circulation and other accidents. . This judgment method has a low degree of automation and accuracy, and the overflow detection time is late; in addition, the research work in the field of early overflow monitoring also focuses on the accurate measurement of the volume change of the drilling fluid storage area, so as to determine the difference between the in and out drilling fluid Determine the overflow state. Due to the large base volume of the storage area, the variation range of the micro flow is not easy to measure. In addition, auxiliary facilities are added to the reconstruction, which increases the complexity of the construction, and the fluctuation range of the liquid level is greatly affected by environmental factors, which fundamentally determines the measurement Less accuracy and delay in detection of warning time. Usually in the drilling process, the time from the liquid level change to the blowout is short. Most wells only take 5-10 minutes from the discovery of overflow to the blowout, and some are even shorter. Even overflow and blowout occur at the same time, and there is almost no emergency. processing time. The principle of overflow monitoring is not complicated, but due to the ambiguity and uncertainty of overflow phenomenon, the limitation of measurement conditions and equipment, and the defects of monitoring scheme, overflow monitoring cannot achieve the expected effect. Through the analysis of the current situation of overflow monitoring at home and abroad, it can be seen that downhole pressure and formation factors are the causes of flow changes, changes in other engineering parameters are the indirect effects of changes in fluid state, and changes in fluid flow reflect overflow The most direct manifestation of the flow state, selecting the outlet flow monitoring technology as the breakthrough point can judge the early overflow state,It is also a reasonable choice based on the status quo of logging technology in my country. 2 Outlet flow monitoring system 2.1 Quantitative monitoring method of outlet flow This method is based on fluid dynamics calculation, analyzes the fluid flow law of the outlet pipeline, considers the natural flow rate of the fluid and the outlet pressure state, adopts the V-shaped outlet pipeline scheme, and the flowmeter test system meets the requirements of the full pipeline. state, the inclination angle range of the inlet end of the return pipeline is 30°~45°.
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