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Wheeled pig

Wheeled Pigs

A unique pig design using wheeled support arms to replace the conventional guide disc setup

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Post-run Wheeled Pig

With the increasing need for pigs to pass through multi-diameter pipelines there has been significant development of new pig types. Where traditional multi-diameter pipelines have stepped between 50-60mm, now diameter changes up to 150-250mm can be considered. Propipe has been providing a unique pig design, which uses wheeled support arms to replace the conventional guide disc arrangement. 

This pig has proven to provide 100% reliability and also a dewatering ability that is second to none. Wheeled support pigs use a series of wheel mounted arms to carry the pig. These are mounted to a central suspension system, allowing the suspension arms to move as a collective unit and providing constant, non-rotational operation. 

This action ensures that the pig does not drop its centreline below the pipeline centreline, which in turn means that the sealing discs are always centrally held within the pipeline. 

Conventional pipeline pigs use rigid polyurethane guide disc to support the weight of the pig guide it through the pipeline, but these guide discs can suffer from compression set or slow recovery (when used for large diameter changes), which can mean a loss of seal. Sealing discs that are held centrally within the pipeline provide maximum sealing ability, which ensures maximum dewatering ability. In many cases, piggability trials and offshore operations have confirmed that a wheeled pig can be run with a small number of seals, but provides extremely high dewatering performance. The low running Dp needed also helps to ensure that the pig is allowed to perform at its optimum without any speed-affected loss in performance. This improved performance also allows the pig design to be used for cleaning and gauging operations as well as production maintenance operations. Pigs can carry brush modules, bypass jetting units and both standard or SMART gauge systems. Wheeled-support pigs have been designed, tested and field proven for the following diameter changes and Propipe continues to develop for larger step changes.

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Wheeled Support Pigs
Client Project Detail Flexible Pipe

Shell UK

Shamrock / Caravel

16” x 20” Flooding and Dewatering Pigs

Rigid

Yemen LNG

YLNG 

38” x 320km Heavy Duty Black Powder Cleaning Pigs

Rigid

Baker Hughes USA

Keithley Canyon Project

16” x 20” Cleaning Pigs – 330km

16”

Technip/Clough

ONGC G-1 & GS15
Field Development

10” x 8” Dewatering Pigs

Rigid

Enterprise Oil USA

Lucius Spar

16” x 20” Flood, Clean & Dewatering Pigs

Rigid

Saudi Aramco/ Saipem

Wasit Project

12” x 8” Dewatering Pigs

Rigid

Halliburton UK

Shell Bittern

8” x 10” Heavy Duty Cleaning Pigs

Rigid

Baker Hughes Canada

SWRX Gas Injection Pipeline Project

10” x 8” Dewatering Pigs

10”

EnQuest UK

Northern Producer Pipeline

8” x 10” Production Cleaning Pigs

10”

Weatherford UK

Ghana Gas Project

10” x 12” Operational Cleaning Pigs

10”

Halliburton UK

TEN Project – Jubilee Gas Export Pipeline

10” x 12” Decommissioning Flooding Pigs and also Recommissioning Dewatering Pigs 

10”

Allseas Netherlands

ROTA 3 Project – Brazil

20” x 24” Flood, Clean, Gauge
and Dewatering Pigs

Rigid

Chevron Nigeria

Escravos Gas Pipeline

20” x 24” Pre-Inspection Cleaning
and Gauging Pigs

Rigid

Datasheet