Abstract: There is provided a method and system for identifying the location of an obstruction in a pipeline comprising: sensing the magnetic field generated by a pipeline at an initial pressure from a first location along the length of the pipeline to obtain a baseline reading; altering the pressure from a first end until a maximum pressure or minimum pressure is attained; sensing the magnetic field at the maximum or minimum pressure from the first location to obtain a stress reading; and identifying the location of the obstruction as a) being between a second end and the first location when there is a deviation between the stress reading and the baseline reading at the first location or as b) being between the first end and the first location when there is an absence of a deviation between the stress reading and the baseline reading at the first location.