Fairfield Energy Ltd had a requirement to replace the two launcher valves on the 24” oil export line from Dunlin Alpha to Cormorant Alpha. In order to undertake this operation safely and efficiently STATS proposed the use of a remotely operated Tecno Plug. The Remote Tecno Plug provides double block and bleed isolation and eliminates the need for communication tethers or specially modified pig trap doors. This allows the old valves to be removed without the requirement for tether management.