PIPELAY ANALYSIS
- Start-up / Initiation
- Normal lay – Static & Dynamic
- Abandonment & Recovery
- Laydown
- Wet Buckle Recovery
- Above Water Tie-in
- Spool lift / Installation
- Beachpull / Horizontal Directional Drilling
- PLET Installation
- Riser stalk-on
Lift Analysis & Rigging design
- General Considerations
- Structure Weight and CoG from W.C.R.
- Minimum 60 deg sling angle.
- CoG shift consideration – 1m radius / as per guidelines
- Lifting Point Verification Checks (Padeyes / Trunnions)
- Hook Prong stability checks
- Rigging Selection from catalogues / existing inventory
Installation Aids Design
- Dynamic Load Factor = 2.0 or as per specifications
- 10 % out of plane loads
- Hydrostatic Pressure Checks
- Hydro test Pressure Checks
Seafastening design and Vessel Motion Analysis
- Self Weight of Cargo
- Vessel Motion (Motion Criteria / MOSES motions)
- Wind Forces
- Wave Slam Forces
- Barge Flexibility (Hog / Sag)
- Cargo Barge Strength Assessment
- Load path verification
FATIGUE LIFE CASE
- Pipe Local Buckling event, while changing the Stinger radius
- Internal caliper Pig (ICP) showing Pipe ID deviation
- Modeling the deformed pipe using the ICP data in Inventor
- Modeling Elasto-Plastic X70 Stress-strain curve (Ramberg Osgood) in ANSYS
SCF CALCULATION CASE
- Calculating the Axial SCF (177.5 bar) & Temperature range = -0.4C to 18.8C
- Calculate the Pipe Strain, using indenters recreating the feature
- Estimate the pipe fatigue life using weld SN curves
Mooring Analysis(Side by Side DP Mode)
Mooring Analysis(Pipelay in DP Assisted Mode)
Mooring Analysis(Pipelay in Anchor Mode)
Jacket Upending Analysis
