Developments in a Free-Swimming Acoustic Leak Detection System for Water Transmission Pipelines

Abstract

Acoustic leak detection systems have proven to be an effective means for identifying leaks in water pipelines. Currently, there are three predominant acoustic leak detection systems utilized. These include acoustic listening devices, leak noise correlators and tethered hydrophone systems. Although each system has merit, each is also limited in its ability to cost effectively survey long reaches of larger diameter water transmission pipelines. Recent technological advances have resulted in the development of a free-swimming acoustic leak detection device capable of surveying more than twelve miles of pipeline with a single deployment into a fully operational pipeline. The system can identify and locate small leaks in large (>10 in. diameter) water pipelines constructed of any pipe material. The device can also pass through in-line valves and negotiate bends in the pipeline. These benefits provide a cost effective and timely approach to identifying and locating leaks in water transmission pipelines.