In order to mitigate risk, pipeline owners spend approximately $1.5 billion every year on pipeline integrity for the thousands of kilometers of pipe across North America. Pipeline integrity often employs the use of inline inspection (ILI) tools known as pigs. These pigs are inserted into a pipeline and pushed along the pipeline by the flow of product. ILI tools have multiple functions, and can be used to clean and assess the condition of the pipeline, as well as to purge different products in a multiproduct pipeline. There is a risk of the deployed pig getting stuck or lost if it is not tracked properly. Locating a lost pig can be costly to the vendors if it is not found quickly and can cause severe damage to the pipeline.
Many legacy tracking providers do not provide a record of each pig passage to prove a pig has actually passed a location. Instead, this is left to the word of the tracker and sometimes is not a reliable source of information. Trackers are not intentionally misleading stakeholders about where a pig is, but traditional methods often make it difficult to tell if a pig has passed or not.
Traditional legacy tracking providers typically use standard geophones to track and identify a pig passage. It is often difficult to determine if a pig has passed because the signal on the geophone is quick and sometimes difficult to hear. This leads to false positives showing a pig has passed even when it hasn’t.
Using more than one sensor to reduce incidents
Using Advanced Pig Tracking, pig passages are detected using multiple sensors to ensure information is defensible and reliable. Advanced tracking systems are equipped with multiple channels. These sensors work simultaneously and reduce incidents of false positives or missed pigs. Not only do these systems come equipped with multiple sensors, but they also provide stakeholders with a record of each pig passage throughout the run.
The record shows the signal of the pig passage as well as the timestamp and pig speed at the specific location. These snapshots can then be uploaded into LiveMap, and are used for real time tracking of the pig’s position, speed, and estimated time of arrival. Conventional above ground markers (AGMs) rely on triggered passage files unlike Advanced Pig Tracking AGMs, which constantly record data when turned on.