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Integrity & Diagnostics -> Pig Tracking
 Radio
transmitters are often used in pigging activities, either by
attaching the transmitter behind the working pig on a caravan
or placing it inside the pig itself. This is because pipeline
pigs often become stuck during operations as a result of the
pig finding buckles, mechanical damage or any other restrictions,
and this causes the pig to act like a cork in a bottle, which
can severely reduce or stop the flow of the product.
Low Frequency Transmitters
By using Roxby's low frequency transmitters during pigging
operations, any stuck pigs can be easily located, either above
ground or at depths of up to 5 metres underground, thus enabling
our clients to make a quick recovery of the pig, saving them
time and money.
Furthermore, through use of coded signals, Roxby's receivers
are capable of detecting several pigs in the pipe at one time
plus, as each transmitter is colour coded and marked using a
letter, it is easy for our operators to distinguish between
individual pigs.
 IRIS
(Internal Rotary Inspection System) Pigs
Roxby have recently added the IRIS pig to our range of services.
This pig works on the principles of the IRIS ultrasonic internal
tube inspection system and gives information about depth, geometry
and location of defects in the pipeline. The IRIS pig can be
battery operated without any cables attached. Kilometers of
pipeline can be inspected with the self contained probe which
is pushed through the pipe line with water. Examples of pipelines
that can be inspected with this tool are very long oil and gas
pipelines as well as offshore risers on wells and platforms,
short flow lines around refineries and tank farms or road, rail
and river crossings. The pig has proven itself through numerous
jobs in most parts of the world to be a rugged and reliable
inspection tool capable of reporting pipeline defects with very
high accuracy. Benefits of this pig include:
- Circumferential inspection of 100% pipeline length
- On line data logging
- Able to navigate 180° bends
- All results shown in B & C scan mode
- Data analysis does not require special training and is
done on any Windows based computer enabling easy understanding
by non-inspection personnel
- Not affected by number of bends and is designed to pass
1.5d bends
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