According to the company, the Petronas complex has an annual LNG production capacity of 23 million tonnes.
The workscope was performed at the MNGL-Dua plant and was part of the Kumang Cluster onshore tie-in project which will supply the onshore facility with gas from the Kanowit CPP, located about 250km off Bintulu.
The company isolated 36" Trunk Lines 3 and 4 while the lines remained at an operating pressure on 69 barg.
Two STATS remotely operated Tecno Plugs were used, one in each trunk line, during the project to isolate the pipeline upstream of the tie-in locations, the company said.
The Tecno Plugs were configured in a three module train to allow the tools to negotiate multiple bends as they were pigged about 80m to their set location.
The remote Tecno Plugs were tracked and positioned using through-wall communication via an extremely low frequency radio control system.
STATS said that the remote Tecno Plugs were constantly monitored and remained stable and in location for about seven days while tie-in operations, which included close proximity hot work activities (welding), were completed.
Finally, the plugs were unset and reverse pigged back to the receivers for demobilisation, the company said.
