Pipeline pig tracking is the process of monitoring the location of a cleaning pig or inline inspection (ILI) tool as it travels through a pipeline. Modern pipeline pig tracking systems use a transmitter installed inside the pig that emits a low-frequency electromagnetic signal. A field technician follows the pipeline route using a compatible receiver, geophone, or Pig Popper® to determine the pig's location and verify successful movement throughout the pipeline.

A field technician follows the pipeline route using a compatible receiver, geophone, or Pig Popper® to detect the transmitter signal and determine the pig's location.

Tracking systems help operators:

Confirm pig movement

Locate launch and arrival

Monitor inspection tools

Locate stalled pigs

Verify successful pipeline operations

Pipeline pig tracking systems generally fall into two categories: intrusive and non-intrusive.

Intrusive Pig Tracking

Intrusive tracking devices physically interact with the pipeline through an installed fitting or mechanical indicator. These systems provide direct confirmation that a pig has passed a specific location and are commonly installed at launchers, receivers, and permanent monitoring points.

Non-Intrusive Pig Tracking

Non-intrusive tracking systems remain outside the pipeline and detect pig movement without penetrating the pressure boundary. Technologies such as Enduro's Non-Intrusive Pig Sensor (NIPS) provide pig passage confirmation while allowing the pipeline to remain in normal operation.

Neither method is universally better. The appropriate choice depends on the pipeline configuration, operating conditions, accessibility, maintenance philosophy, and the level of confirmation required.

A stuck pipeline pig can often be located by tracking the transmitter signal along the pipeline until the signal no longer progresses.

Once the pig's location is confirmed, operators evaluate:

Pipeline pressure

Pig movement

Flow conditions

Debris accumulation

Pipeline geometry

Accurate pig tracking reduces troubleshooting time and helps operators determine the safest recovery strategy.

Pipeline pigs are typically located using a transmitter installed inside the pig and a compatible surface receiver. As the transmitter emits a signal, technicians walk or drive the pipeline route while monitoring signal strength to determine the pig's location.

Depending on the application, operators may use:

Pig Poppers®

Wireless geophones

Electromagnetic receivers

Above-ground marker systems

Depth, soil conditions, pipeline diameter, and transmitter frequency all influence tracking performance.

Pipeline transmitters generate a low-frequency electromagnetic signal that passes through the steel pipeline and surrounding soil.

Compatible tracking equipment detects the signal above ground, allowing technicians to monitor the pig's location during operation.

Transmitter selection depends on:

Pipeline diameter

Tracking depth

Product being transported

Required tracking distance

Inline inspection (ILI) runs often require accurate pig tracking to help operators monitor tool progress, confirm location, and support correlation of inspection data throughout the pipeline system.

Tracking becomes especially important during caliper, MFL, DFL, and geometry tool runs where location verification and operational awareness are critical. Above Ground Markers (AGMs), Non-Intrusive Pig Sensors, and mechanical signaling devices can help crews monitor inspection tool movement and identify potential operational concerns during the run.

In some applications, tracking systems may also assist with:

• Verifying launcher and receiver events

• Monitoring inspection speed consistency

• Supporting anomaly location correlation

• Improving communication between field crews and control teams

• Assisting with difficult terrain or remote locations

Proper tracking during inline inspection operations helps improve visibility, operational coordination, and overall confidence throughout the inspection process.

Pipeline pig trackers locate cleaning pigs and inline inspection (ILI) tools as they travel through a pipeline. A transmitter installed inside the pig emits a low-frequency electromagnetic signal that is detected above ground using compatible tracking equipment, such as a receiver, wireless geophone, or Pig Popper®. This allows operators to monitor pig movement, confirm passage, and accurately locate the pig during the run.

Pipeline pigs are typically located using a transmitter installed inside the pig and a compatible receiver on the surface. As the pig moves through the pipeline, the transmitter emits a signal that can be detected above ground. Technicians follow the pipeline route and monitor the signal strength to determine the pig's location, even when it is buried underground.

If a pipeline pig stops moving, tracking equipment can be used to locate its last known position. Operators use the transmitter signal to determine where the pig has stopped, allowing them to investigate possible causes such as debris accumulation, pipeline restrictions, pressure changes, or geometry challenges. Accurate pig tracking reduces troubleshooting time and helps operators develop an appropriate recovery plan.

There is no single transmitter frequency that is best for every application. The appropriate transmitter depends on factors such as pipeline diameter, burial depth, product being transported, tracking distance, and soil conditions. Selecting the correct transmitter helps maximize signal strength and tracking accuracy throughout the pigging operation.

A Pig Popper® is an intrusive pig signaling device that confirms when a pipeline pig passes a specific location. Installed directly on the pipeline, it provides a positive indication of pig arrival without requiring excavation. Pig Poppers® are commonly used at launchers, receivers, valve locations, and other critical points where confirmation of pig passage is important.

Modern pipeline pig tracking systems provide highly accurate pig location when the proper transmitter and receiver combination is selected for the application. Tracking accuracy depends on factors such as pipeline depth, soil conditions, transmitter strength, pipeline diameter, and operator experience. Choosing the right equipment significantly improves tracking reliability.

Yes. Many inline inspection (ILI) tools use transmitters that allow operators to monitor tool movement throughout the inspection run. Tracking an ILI tool helps verify its location, confirm successful passage through critical pipeline features, and quickly identify if the tool stops or encounters an obstruction.

The right tracking equipment depends on your application. Common tracking systems include transmitters, receivers, wireless geophones, and Pig Poppers®. Factors such as pipeline size, product, burial depth, operating conditions, and project objectives all influence the best equipment selection. Enduro's technical specialists can help recommend the appropriate tracking solution for your project.