Pigging and plugging

About the course

This course will help subsea pipeline and integrity engineers to understand how to use pipeline pigs and plugs to perform a variety of operations.

Providing an overview of pigs and plugs available and their functionality, the tutor will explain the latest theories on improving the reliability and accuracy of pigging, for both cleaning and inspection purposes. Analysing case studies and discussing how to avoid stuck pigs and plugs, you will deepen your knowledge of how to run successful and safe pigging and plugging campaigns.

Learning outcomes

  • Explain the principles of operating pipeline pigs and isolation plugs
  • Compare different types of pigs and plugs and explain when and how they are used
  • Investigate problems that can occur when pigging and suggest resolutions
  • Apply industry lessons learned and best practice to your projects




2 Days

Study hours




Upcoming dates


Request for a quote to get a training date

Construction of subsea pipelines - course contents


Introduction to pigging

  • Overview of pigs
  • Types of pigging programmes

Flow assurance

  • Introduction to flow assurance
  • Flow regime
  • Causes of flow restriction
  • Flow control methods


  • Assessment of pipeline piggability
  • Modifications required
  • Flow assurance issues
  • HSE considerations

Pig design

  • Design of pigs
  • Pig design validation
  • Tracking design

Launching and receiving

  • Pig trap design
  • Principles of pig launching and receiving
  • Main issues
  • Risk assessment procedures
  • Operational pigging procedures


Pipeline cleaning

  • Pipeline cleaning strategy
  • Operational maintenance pigging
  • Pig types and function

Inspection tools

  • Introduction
  • Gauge pig
  • Calliper pig
  • Magnetic flux pig
  • Ultrasonic pig
  • Inertial mapping unit
  • Inspection of flexibles
  • Other inspection technologies
  • Case study

Non-standard pigging operations

  • Requirement for non-standard pigging
  • Non-standard pigging/inspection techniques
  • Stuck/stalled pig contingencies

Pipeline isolation

  • High friction pigs
  • Types of plug
  • Plug design
  • Deployment
  • Setting/unsetting
  • Retrieval
  • Environmental issues