KINTORE, UK – STATS Group has completed a subsea pipeline repair and isolation project in the Gulf of Thailand.
CUEL commissioned the company to address damage to the 8-in. gas condensate export pipeline which had been dragged 8 m (26 ft) out of position by a vessel anchor and needed a permanent repair.
For this program STATS deployed products that included slab valves, hot tap fittings, completion plugs, end connectors, and abandonment plugs.
This allowed the repair to be effected without impacting production or diver safety.
An 8-in. bypass was installed on the seabed as a permanent repair to re-route the pipeline medium away from the damaged pipeline section, which was in around 60 m (197 ft) of water and which had an operating pressure ranging from 7-21 bar (101-304 psi).
STATS’ applied its BISEP system to provide leak-tight isolation of the pressurized pipeline, deployed through a full bore hot tap penetration at the isolation location via a mechanical hot tap fitting.
The company’s previous subsea isolation, forCOOEC Subsea Technology, involved repairing the Yacheng pipeline in the South China Sea following damage by a ship’s anchor.
It repaired the line at an unpiggable location 280 km (174 mi) from shore and in water depths of 60 m without depressurizing and flooding the entire pipeline.