In order to facilitate replacement of a defective emergency shutdown (ESD) valve on a primary export line, pressure isolation services were required at the customer’s LNG complex in Qatar.
The 38 inch diameter pipeline runs from two wellheads in the offshore natural gas condensate field to the onshore LNG processing facility.
TDW launched two 38 inch SmartPlugå¨ isolation modules using an existing onshore pig-receiving trap, before using the remotely-operated SmartTrack㢠tracking and pressure-monitoring system to monitor the pipeline pressure and module locations. The TDW team then set the modules and safely isolated the affected section so that the modifications on the ESD valve could be safely carried out.
Once the ESD valve bypass repair work was completed, the set SmartPlug modules were used to locally hydrotest the integrity of the completed work to a pressure of 120 bar.
TDW Director, Market Development – Offshore Enzo Dellesite said “The entire operation was achieved without flaring product or venting the line, which meant that costs were substantially reduced and that the environment was not adversely affected. It was a great success on every front.”