The Petronas LNG Complex includes three liquefied natural gas (LNG) plants owned and operated by Petronas’ joint venture companies.
The LNG production facility has an annual capacity of 23 million tonnes.
STATS isolated 36" Trunk Lines 3 and 4 while the lines remained at an operating pressure of 69 barg.
The new pipelines to be tied-in will supply the onshore facility with gas from the Kanowit CPP located about 250km off Bintulu.
Two STATS remotely operated 36" Tecno Plugs were used, one in each trunk line, during the project to isolate the pipelines upstream of the tie-in locations.
According to the company, STATS Remote Tecno Plugs were configured in a three module train, to allow the tools to negotiate multiple bends as they were pigged about 80m each to their set locations.
The Remote Tecno Plugs were tracked and positioned using through-wall communication, and an extremely low frequency radio control system sets and monitors the plugs throughout the isolation.
The remote control system provides a high degree of flexibility and eliminates the need for tethers or specially modified pig-trap doors, STATS said.
The company said that the Remote Tecno Plugs were constantly monitored and remained stable and in location for about seven days each 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.
