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| Completed Phase 1 SOW of Konikonna Spool Reroute for bp including design basis, MTO, pipe wall thickness and concrete coating deternation (4/2025, as a consultant to Subsea 7) |
| Simulated buckling behavior of flexible flowline at pipeline crossing and checked the integrity of crossed pipe for bp-Ginger (2/2025, as a consultant to Subsea 7) |
| Assessed fatigue damage of a riser free span from slugging using Orcaflex, and supervised Indian junior engineers on water injection and gas lift risers and subsea pipelines in detailed engineering of Utsira High tie-back project (8/2024, as a consultant to TechnipFMC). |
| Completed riser pull-in and in-place analyses of production riser through J-tube in detailed engineering of Utsira High project (3/2024, as a consultant to TechnipFMC) |
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Liuxon has extensive experience with offshore pipelines extended from shallow water to deep-water. Its services cover feasibility study, basic design, detailed design, independent check and installation support. Liuxon's experience includes full scopes of pipeline engineering. In addition to common issues such as route selection, wall thickness determination, on-bottom stability, etc., Liuxon has excelled in challenging issues as follows:
1. Offshore Pipelines subjected to Geo-hazard
Geo-hazard to offshore pipelines includes mudslides triggered by earthquakes or ocean waves, soil liquefactions and lateral spreading, active sandwaves, active faults, rough seabed that creates excessive free spans, etc. Liuxon has the tools and expereience to identify the potential risks and to mitigate the risks when needed.
2. Subsea Pipelines for Cryogenic Fluids
Liuxon's proprietary Relaxing Transfer System ® uses pipe-in-pipe technology for transfer lines. For sites prone to high tides, storm surges, and tsunami, the cryogenic pipelines are preferably to be located inside a tunnel (subsea LNG pipeline).
3. Buckling of High Temperature and High Pressure Pipelines
Pipelines of hot fluids have a tendency to buckle. Buried offshore pipelines are likely to go through upheaval buckling first and eventually turn into lateral buckling due to ocean currents and waves. Flowlines laid on the seabed buckle laterally under thermal loads. Liuxon has developed tools to predict buckling behaviors and mitigate pipe stress at the buckles.
4. Installation of Pipelines and Risers
Installation of offshore pipelines and risers could be challenging depending on pipe properties and environmental conditions. For example, shore pull or s-lay of heavily coated pipelines requires floaters to reduce the pulling force and pipe stress at sagbend. Liuxon has developed a mobile floater train to apply buoyancy to the right location of the pipeline during S-lay. Liuxon has also analysed riser pulling through a tight-radius J-tube starting from a pipe string laid on the seabed using ABAQUS. Liuxon has strong R&D capability to identify or develop a right solution to a complicated installation issue.
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