Research On Field Application Of Gas Ultrasonic Flowmeter

In recent years,the international and domestic attention to environmental protection.Natural gas as a clean new energy,in the past ten years,the rapid rise in its use.How to ensure the accurate measurement of natural gas flow,has become an important research topic of the current measurement workers.Ultrasonic flowmeter is a new type of flowmeter,because it has high measurement accuracy,good stability,less maintenance workload is more and more used in the natural gas commodity trade measurement field.How to ensure that the ultrasonic flowmeter measurement in the process of production performance,at home and abroad to carry out a lot of research,and introduced the relevant standards and regulations.Changqing Oilfield in recent ten years also gradually in foreign natural gas trade connection site using ultrasonic flowmeter instead of the traditional orifice plate differential pressure flowmeter.Firstly,this paper studies in recent years at home and abroad the research status of ultrasonic flowmeter,introduces the principle of ultrasonic flowmeter,and combined with the Changqing Oilfield natural gas trade measurement situation,the comparison and analysis of the ultrasonic flowmeter and orifice plate differential pressure flowmeter in natural gas measurement aspects of advantages and disadvantages,the ultrasonic flowmeter is more suitable for natural gas trade measurement field.Also in order to better use of ultrasonic flowmeter,through a combination of theory and field test of the key way of studied factors in field application in many of the effects of ultrasonic flowmeter measurement accuracy,and to put forward measures and Countermeasures to solve.For ultrasonic flowmeter in use may occur in the process of fault,with prospective propose ideas of remote diagnosis system of ultrasonic development and through examples verify the application of the system,solve the ultrasonic flowmeter failure to timely detection and treatment of problems.In order to ensure the accuracy of the measurement of ultrasonic flowmeter,it is necessary to calibrate or calibrate the ultrasonic flowmeter regularly.As this paper focuses on the content,detailing the several test methods of ultrasonic flowmeter,and the comparative analysis,proposed the school actual flow calibration is to ensuring accuracy of the best test method of ultrasonic flowmeter measurement values.Also according to the current domestic ultrasonic flowmeter calibration status,combined with Changqing oil field practice,proposed the construction of suitable for Changqing Oilfield of mobile gas flow standard device,to achieve on-site installation and use ofultrasonic flowmeter online real flow testing.The applicability of the standard device is verified by the development of the field practice and the data analysis.At the same time,a brief introduction is made on the repeatability test of flow standard device.In view of the fact that some of the ultrasonic flowmeter can not realize the online real flow calibration,the paper also introduces the practical application of the method of sound speed inspection.