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Pipeline
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1 | Strength and Depth
a short brief about
Offshore Pipeline Installation Engineering
August 30, 2010
Vladimir Medio SentosaOffshore Pipeline Engineer (Installation)SapuraAcergy Sdn. Bhd.
2 | Strength and Depth
Offshore pipeline / installation engineering?
3 | Strength and Depth
Pipeline?
Platform PlatformPipeline
4 | Strength and Depth
Pipeline?
FPS OnshorePipeline
5 | Strength and Depth
Main Equipment
6 | Strength and Depth
• Conventional laybarge:
• Using mooring to keep position
• Coverage area up to WD 50-100m
• Modern laybarge:
• Using DP (dynamic positioning) to keep position
• Coverage area more than WD 50m
7 | Strength and Depth
Process Overview
• Start-Up / Initiation
• Loading and storage
• Firing Line– Welding– NDT– Field joint coating
• Tensioning
• Laydown• Emergency
– Abandonment and Recovery
8 | Strength and Depth
Installation Analysis
• Installation analysis:– Start up, normal laying, A/R analysis, laydown– Local buckling check– Fatigue analysis– Free span / bottom roughness
• Based on DNV OS F101– Section 12 K300, Simplified laying criteria– Area: Overbend and Segbend– Check: Stress and Strain
• Result of analysis is exceed the criteria?– Environmental loads: Hs, T, current– Optimizations: roller setting (barge/stinger), tension, trim, stinger – Others: buoyancy tank
9 | Strength and Depth
S-Lay Method
10 | Strength and Depth
OFFPIPE Software
• Static analysis:– Start up, A/R analysis, laydown, free span / bottom roughness
• Dynamic analysis– Normal laying: RAO, environment condition
11 | Strength and Depth
Output OFFPIPE
12 | Strength and Depth
13 | Strength and Depth
Thank you!
Vladimir Medio SentosaOffshore Pipeline Engineer (Installation)[email protected] Desk : +60386572961Mobile: +60173531041
Alternatively:[email protected]
