Freezing Technique Applied to an Offshore Pipeline at Campos Basin in Brazil

This paper describes an offshore pipeline freezing technique that was used to isolate a gas pipeline to effect repairs and to and perform associated tests. The freezing technique was used after evaluation and land testing and was successful in returning the pipeline to production much sooner that the other compared conventional methods. This technique reduced the amount of water used in the gas pipeline and enabled the repairs to be pressure tested prior to returning the pipeline to service.