Furmanite Designs Customized Expert Solution for Unocal’s Sub-Sea Platform Repairs
Blindfolded Furmanite Engineers Develop and Implement Solution Ahead of Schedule
In early October 2004, Unocal discovered damage to a pipeline riser connected to a production platform approximately 120 feet below the surface of the sea while working in the waters of the Cook Inlet in Alaska. Immediately Unocal engineers contacted Furmanite North America to obtain expert consultation and a solution. As one of the world’s leading independent natural gas and crude oil exploration and production companies, Unocal understands that offshore platform repairs can be costly and time consuming.
Unocal engineers learned about Furmanite based on previous experience with Furmanite products that have been used on other Unocal facilities in Alaska.
The problem discovered on the platform included damage to a ten inch pipeline riser which exits the leg of a production platform about two feet above the seabed. The line, used to transfer natural gas from the platform to the shore, travels down through the middle of the platform, turns and exits the two foot thick platform leg, and terminates at a flange approximately twenty inches outside the leg.
As a standard solution, Unocal would typically send divers down to install a sub-sea pipeline repair clamp. Unfortunately no “off the shelf” repair clamps were available to suit this repair and the lead time for a custom made clamp. To add to the troubles, the entire fix had to be completed in early November. Any later, winter weather and sea ice makes diving impossible.