Project description: The world's first crude oil TCP Flowline
In 2012, Petronas Carigali contracted Strohm for the development & qualification of non-metallic, subsea flowline. Petronas have a large stock of corroding subsea flowlines that suffer from Sulphur Reducing Bacteria (SRB), or Microbacteria Induced Corrosion (MIC), for which Petronas seeks a solution in the form of taking the corrosion element out of the equation. The qualification program included, besides a variety of lab and prototype testing, full scale offshore installation testing. With successful completion of the whole program, a pilot flowline was installed in 2017.
Key system characteristics
Lower total installed cost:
- Fast installation
- Terminated offshore
- Single operation platform tie-in
- No divers
Lower total cost of ownership:
- No corrosion
- Less pigging
- No inhibitors, biocides pumping
Specifications
- Inner Diameter: 6''
- Pressure rating: 100 bar
- Water depth: 50 m
- Length: 500 m
Scope of Work
The Petronas pilot for a crude oil flowline was installed in West Lutong. Key project scope split in two main elements:
Platform to platform I-tube connection:
- TCP Flowline I-tubes on both platforms
- TCP pull-through I-tube, pipe termination onsite
- I-tube assembly lifted in place at both platforms
Pre-assembly of TCP Flowline and pull to install offshore:
- On-bottom stability through chain connected to flowline
- Tug-boat taking flowline to location
- Cutting of buoyancy to sink flowline, divers to connect flowline end-fittings to I-tube sections
Execution
Pilot project proved following TCP specific elements:
- TCP pull-through I-tube and onsite termination
- TCP on-bottom stability measure by means of chain
- Installation of the world’s first TCP for crude oil service
- Completing TCP Flowline qualification for Petronas
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