TDW in GoM Gas Valve Upgrade Project

SmartPlug®T.D. Williamson (TDW) has provided pipeline pressure isolation services for a major operator that sat out to execute a gas valve upgrade project on a deepwater gas export pipeline offshore New Orleans in the Gulf of Mexico.

TDW used its remote-controlled SmartPlug® tool to isolate pressure in specific sections of pipelines and risers so that repairs or interventions can be carried out safely.

Initially, TDW was required to isolate a 16-inch gas riser connected to a major subsea gas pipeline network in order to replace a valve, so it carried out engineering work, assembled the pressure isolation tool, and completed all factory acceptance testing (FAT) in mid-2012.

Plans changed when the operator decided to postpone replacement of the single valve so that three additional valves could be installed, and a launcher extension added to facilitate inline inspection tool runs.

To ensure that this isolation operation would go to plan and achieve first-time run success, TDW re-verified the project engineering, performed additional communication and pull tests, and executed a new in-depth FAT. In addition, a comprehensive range of risk and peer reviews were carried out. Working in cooperation with the operator’s team, 3,500 hours were invested in preparing for the isolation.

Bjørn-Olav Gilje, Project Manager for TDW, stated: “As a result, the complex valve upgrade project and launcher extension installation were completed with minimal downtime, without disrupting production or supply to millions living on the Gulf Coast. A continuous flow through the multiple downstream connections was maintained throughout the duration of the project. The fact that it was achieved safely, without affecting the surrounding environment in any way makes it all the more satisfying.”

For TDW, this operation represents a milestone in terms of preparation, dedication to the highest levels of safe working practices, and teamwork, as reflected by the company’s participation in the numerous workshops hosted by the operator for all contractors involved in the project.

Press Release