Leak Detection in Crude Oil Pipelines by leak detection pigs
The pipeline operators usually perform regular pig runs for leak detection in their lines. This detection method is based on several noises caused by varying pin holes and recorded during the pig run. Basic information about the noise and its frequency emitted by a pipeline leak will be presented in detail as well as a comparison of different working principles and technical specifications used in TAL for the last decades. Based on the analysis software a typical leak signature will be explained with the help of a graphic time/ frequency spectrum. But there is an uncertainty if the noise was recorded during the pig run. Therefore TAL developed a pig run verification system consisting of an automatic artificial leak and a verification system and holds a patent since 2012. The function of the full remotely controlled installation will be shown and described in detail as well as the present and expected benefit of such installation will be explained.