G - Physics – 01 – N
Patent
G - Physics
01
N
324/50
G01N 27/82 (2006.01) F17D 5/00 (2006.01) F17D 5/06 (2006.01)
Patent
CA 1161115
ABSTRACT OF THE DISCLOSURE A magnetometer is moved along the route of a pipeline and the output of the magnetometer is observed to identify pipeline characteristics. Used with a buried pipeline the magnetometer is moved over the surface of the overlay to identify and locate girth welds, pipeline fittings and accoutrements, changes in pipeline metallurgy such as occur with large hard spots and changes in wall thickness as occur in extensive and severe corrosion. Similar functions can be performed with underwater pipelines using a magnetometer which is located in an appropriate container and trolled along the route of the pipeline by a vessel. The pipeline is formed of pipe sections which are arranged in an identifiable pattern according to their magnetic characteristics to facilitate inspection and maintenance.
357174
Mccarthy Tetrault Llp
Transcanada Pipelines Limited
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