Installation Engineering
PIPELAY ANALYSIS
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
STRUCTURAL ANALYSIS
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
DEFORMED PIPELINE
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
NAVAL ANALYSIS
Mooring Analysis (Side by Side DP Mode)
Mooring Analysis (Pipelay in DP Assisted Mode)
Mooring Analysis (Pipelay in Anchor Mode)
Jacket Upending Analysis
MOORING SYSTEM DESIGN
