What is Pig Tracking?
Pig tracking is the process of monitoring the location of a pipeline pig as it moves through a pipeline. This crucial practice enables operators to quickly identify and address any issues, such as a stuck pig, which could pose operational risks and disrupt pipeline performance.
Tracking is applicable to most pig runs and nearly all pipeline systems. It is particularly critical in situations where there is a heightened risk of a pig becoming stuck—for instance, during the commissioning of a newly constructed pipeline or when working on lines that have been rarely or never pigged. Proactive tracking ensures smooth operations, reduces downtime, and enhances pipeline safety.
How does it work?
Pig tracking is generally done by a team who will intercept the pig at predetermined Above Ground Markers (AGM) and report its passage. Before most runs, a signal-emitting transmitter or magnet is placed inside the pig, which can be picked up above ground. The pig tracking teams will monitor the passage of the pig with receivers programmed to detect either the transmitter’s frequency or the change in magnetic field. As another measure of ensuring passage, these teams will listen for the pig with a geophone (acoustic amplifier system), which can allow them to hear the pig from up to 2 miles away.