Oil Pipeline Leak Detection Technology

Pipeline technology has particular advantage in transporting liquid such as petroleumand natural gas. But in recent years, leakage became the primary malfunction intransporting-oil pipe running. It interfered in natural production badly, and brought theenormous economic losing. So the research and application of the leak detecting andlocating system of transporting-oil pipe becomes an urgent problem. Advanced research ofleakage detection and location of pipeline can discover the leakage of pipeline, and takeaction quickly. It may reduce the happening of steal case, protect environment as early aspossible, reduce the enterprise's economic losing and improve the level of enterprise'sautomatic management.The thesis explores some leak detecting and locating methods, like model method,signal processing method, and analyzes the relative merits of each method. The reason ofthe pipeline pressure movement is studied and the thesis designs a project of the pipelineleak detection and leak localization using double-pressure transducer device andcorrelation analysis method.The thesis analyzes the character of pressure curve, chooses Median Filter andimproved Average Filter to process the original pressure data sequence. The characters ofwave polarityand wave area are used to pick-up the feature of inflexion. Then, thecorrelation analysis method is used to process exceptional pressure data which acquiredfrom the double-pressure transducer based on many ways, such as pressure data method,included angle method, line-fitting method and so on. The thesis expounds how to selectthe neighborhood for doing correlation analyzing and analyses the main factors affectingthe leakage location based on the leakage location formula and attempts a better leakagelocation method.