![Page 1: De-risking offshore installation of flexiblesand umbilicals ... Vessel Position (m) Riser Payout (m) A&R Payout (m) Tensioner Load (Tonnes) A&R Wire Load (Tonnes) Riser Minimum Bend](https://reader031.vdocument.in/reader031/viewer/2022030419/5aa5f0597f8b9ac8748dd4b7/html5/thumbnails/1.jpg)
www.xodusgroup.com
De-risking offshore installation of flexibles and umbilicals through the use of detailed global analysis modelling
Chris Jones
![Page 2: De-risking offshore installation of flexiblesand umbilicals ... Vessel Position (m) Riser Payout (m) A&R Payout (m) Tensioner Load (Tonnes) A&R Wire Load (Tonnes) Riser Minimum Bend](https://reader031.vdocument.in/reader031/viewer/2022030419/5aa5f0597f8b9ac8748dd4b7/html5/thumbnails/2.jpg)
Global Analysis
> Using FEA software to model the different stages of the installation of a subsea product
> Static and Dynamic Behavior e.g. – Tension in the winch– Tension in the
pipeline/flexible/umbilical– Bending / Moments /
Curvatures
Installation Analysis
Lay Tables
Procedure
Installation Analysis
Environmental Limits
![Page 3: De-risking offshore installation of flexiblesand umbilicals ... Vessel Position (m) Riser Payout (m) A&R Payout (m) Tensioner Load (Tonnes) A&R Wire Load (Tonnes) Riser Minimum Bend](https://reader031.vdocument.in/reader031/viewer/2022030419/5aa5f0597f8b9ac8748dd4b7/html5/thumbnails/3.jpg)
Installation Analysis Software Programs
> OrcaFlex
> Flexcom / Pipelay
> Riflex / Simo
> Offpipe (Rigid Pipelay)
Installation Analysis
OrcaFlex www.orcina.com
Flexcomhttp://www.mcskenny.com/software-solutions/flexcom.html
![Page 4: De-risking offshore installation of flexiblesand umbilicals ... Vessel Position (m) Riser Payout (m) A&R Payout (m) Tensioner Load (Tonnes) A&R Wire Load (Tonnes) Riser Minimum Bend](https://reader031.vdocument.in/reader031/viewer/2022030419/5aa5f0597f8b9ac8748dd4b7/html5/thumbnails/4.jpg)
Installation Analysis
“Typical” Analysis of a Flexible Flowline or Umbilical > Lowering to the seabed> Land the 1st End Termination> Normal pipelay> Lower the 2nd End> Land the 2nd End
Also > J-Tube Pull-Ins> Riser Pull-In (e.g. pull in to FPSO)> etc
![Page 5: De-risking offshore installation of flexiblesand umbilicals ... Vessel Position (m) Riser Payout (m) A&R Payout (m) Tensioner Load (Tonnes) A&R Wire Load (Tonnes) Riser Minimum Bend](https://reader031.vdocument.in/reader031/viewer/2022030419/5aa5f0597f8b9ac8748dd4b7/html5/thumbnails/5.jpg)
Riser Pull-In To FPSOExample
![Page 6: De-risking offshore installation of flexiblesand umbilicals ... Vessel Position (m) Riser Payout (m) A&R Payout (m) Tensioner Load (Tonnes) A&R Wire Load (Tonnes) Riser Minimum Bend](https://reader031.vdocument.in/reader031/viewer/2022030419/5aa5f0597f8b9ac8748dd4b7/html5/thumbnails/6.jpg)
Riser LaydownExample
![Page 7: De-risking offshore installation of flexiblesand umbilicals ... Vessel Position (m) Riser Payout (m) A&R Payout (m) Tensioner Load (Tonnes) A&R Wire Load (Tonnes) Riser Minimum Bend](https://reader031.vdocument.in/reader031/viewer/2022030419/5aa5f0597f8b9ac8748dd4b7/html5/thumbnails/7.jpg)
Riser Laydown – Lay TableExample
Step Vessel Position (m)
Riser Payout (m)
A&R Payout (m)
Tensioner Load (Tonnes)
A&R Wire Load (Tonnes)
Riser MinimumBend Radius
(m)1 175 355 - 24.6 - 32
2 275 650 - 44.5 - 50
3 400 900 - 12.8 - 62
4 540 1200 - 37.2 - 48
5 570 1400 - 59.5 - 42
6 610 (1400) 250 - 74 45
7 620 (1400) 425 - 75 42
8 760 (1400) 575 - 60 33
9 890 (1400) 740 - 42 18
![Page 8: De-risking offshore installation of flexiblesand umbilicals ... Vessel Position (m) Riser Payout (m) A&R Payout (m) Tensioner Load (Tonnes) A&R Wire Load (Tonnes) Riser Minimum Bend](https://reader031.vdocument.in/reader031/viewer/2022030419/5aa5f0597f8b9ac8748dd4b7/html5/thumbnails/8.jpg)
The main part of the installation process often provides low risk to the product
> Installation operations with the product in the water are often relatively straightforward e.g. lowering and laying the product
> Large MBRs> Wide range of payout and vessel position possible without damaging the product> Good safety margin
Higher risk is during deck handling, initiation, landing and tie-in operations
> The devil is in the detail!
Experience from Installation Analysis
![Page 9: De-risking offshore installation of flexiblesand umbilicals ... Vessel Position (m) Riser Payout (m) A&R Payout (m) Tensioner Load (Tonnes) A&R Wire Load (Tonnes) Riser Minimum Bend](https://reader031.vdocument.in/reader031/viewer/2022030419/5aa5f0597f8b9ac8748dd4b7/html5/thumbnails/9.jpg)
> An umbilical is stored on a reel or carousel on the back of the installation vessel
> The umbilical path from the carousel to the water during lay is usually controlled by a series of sheaves and chutes
> However to get the end fittings into the water, they need to be freely lifted – High risk to the product!!
Deck Handling and OverboardingExample
![Page 10: De-risking offshore installation of flexiblesand umbilicals ... Vessel Position (m) Riser Payout (m) A&R Payout (m) Tensioner Load (Tonnes) A&R Wire Load (Tonnes) Riser Minimum Bend](https://reader031.vdocument.in/reader031/viewer/2022030419/5aa5f0597f8b9ac8748dd4b7/html5/thumbnails/10.jpg)
Deck HandlingExample
CarouselDeck
Tensioner
Overboarding Chute
Deck Deflector
Umbilical Path
Installation Vessel Aft Deck
![Page 11: De-risking offshore installation of flexiblesand umbilicals ... Vessel Position (m) Riser Payout (m) A&R Payout (m) Tensioner Load (Tonnes) A&R Wire Load (Tonnes) Riser Minimum Bend](https://reader031.vdocument.in/reader031/viewer/2022030419/5aa5f0597f8b9ac8748dd4b7/html5/thumbnails/11.jpg)
Deck HandlingExample
![Page 12: De-risking offshore installation of flexiblesand umbilicals ... Vessel Position (m) Riser Payout (m) A&R Payout (m) Tensioner Load (Tonnes) A&R Wire Load (Tonnes) Riser Minimum Bend](https://reader031.vdocument.in/reader031/viewer/2022030419/5aa5f0597f8b9ac8748dd4b7/html5/thumbnails/12.jpg)
Deck HandlingExample
![Page 13: De-risking offshore installation of flexiblesand umbilicals ... Vessel Position (m) Riser Payout (m) A&R Payout (m) Tensioner Load (Tonnes) A&R Wire Load (Tonnes) Riser Minimum Bend](https://reader031.vdocument.in/reader031/viewer/2022030419/5aa5f0597f8b9ac8748dd4b7/html5/thumbnails/13.jpg)
Deck HandlingExample
![Page 14: De-risking offshore installation of flexiblesand umbilicals ... Vessel Position (m) Riser Payout (m) A&R Payout (m) Tensioner Load (Tonnes) A&R Wire Load (Tonnes) Riser Minimum Bend](https://reader031.vdocument.in/reader031/viewer/2022030419/5aa5f0597f8b9ac8748dd4b7/html5/thumbnails/14.jpg)
Deck HandlingExample
![Page 15: De-risking offshore installation of flexiblesand umbilicals ... Vessel Position (m) Riser Payout (m) A&R Payout (m) Tensioner Load (Tonnes) A&R Wire Load (Tonnes) Riser Minimum Bend](https://reader031.vdocument.in/reader031/viewer/2022030419/5aa5f0597f8b9ac8748dd4b7/html5/thumbnails/15.jpg)
Deck HandlingExample
![Page 16: De-risking offshore installation of flexiblesand umbilicals ... Vessel Position (m) Riser Payout (m) A&R Payout (m) Tensioner Load (Tonnes) A&R Wire Load (Tonnes) Riser Minimum Bend](https://reader031.vdocument.in/reader031/viewer/2022030419/5aa5f0597f8b9ac8748dd4b7/html5/thumbnails/16.jpg)
Deck HandlingExample
![Page 17: De-risking offshore installation of flexiblesand umbilicals ... Vessel Position (m) Riser Payout (m) A&R Payout (m) Tensioner Load (Tonnes) A&R Wire Load (Tonnes) Riser Minimum Bend](https://reader031.vdocument.in/reader031/viewer/2022030419/5aa5f0597f8b9ac8748dd4b7/html5/thumbnails/17.jpg)
Deck HandlingExample
![Page 18: De-risking offshore installation of flexiblesand umbilicals ... Vessel Position (m) Riser Payout (m) A&R Payout (m) Tensioner Load (Tonnes) A&R Wire Load (Tonnes) Riser Minimum Bend](https://reader031.vdocument.in/reader031/viewer/2022030419/5aa5f0597f8b9ac8748dd4b7/html5/thumbnails/18.jpg)
Deck HandlingExample
![Page 19: De-risking offshore installation of flexiblesand umbilicals ... Vessel Position (m) Riser Payout (m) A&R Payout (m) Tensioner Load (Tonnes) A&R Wire Load (Tonnes) Riser Minimum Bend](https://reader031.vdocument.in/reader031/viewer/2022030419/5aa5f0597f8b9ac8748dd4b7/html5/thumbnails/19.jpg)
Deck HandlingExample
![Page 20: De-risking offshore installation of flexiblesand umbilicals ... Vessel Position (m) Riser Payout (m) A&R Payout (m) Tensioner Load (Tonnes) A&R Wire Load (Tonnes) Riser Minimum Bend](https://reader031.vdocument.in/reader031/viewer/2022030419/5aa5f0597f8b9ac8748dd4b7/html5/thumbnails/20.jpg)
Deck Handling – Dynamics – Pendulum EffectsExample
Double Pendulums
![Page 21: De-risking offshore installation of flexiblesand umbilicals ... Vessel Position (m) Riser Payout (m) A&R Payout (m) Tensioner Load (Tonnes) A&R Wire Load (Tonnes) Riser Minimum Bend](https://reader031.vdocument.in/reader031/viewer/2022030419/5aa5f0597f8b9ac8748dd4b7/html5/thumbnails/21.jpg)
Deck Handling – Dynamics – Pendulum EffectsExample
> Limit the sea state if needed to ensure dynamic motion does not damage the product
> Limit Hs (amplitude) or Tp (avoid resonant periods)
> MRU Direct Crane Tip Measurement
> Irregular Waves
![Page 22: De-risking offshore installation of flexiblesand umbilicals ... Vessel Position (m) Riser Payout (m) A&R Payout (m) Tensioner Load (Tonnes) A&R Wire Load (Tonnes) Riser Minimum Bend](https://reader031.vdocument.in/reader031/viewer/2022030419/5aa5f0597f8b9ac8748dd4b7/html5/thumbnails/22.jpg)
Pendulum Effect!
https://www.youtube.com/watch?v=ZD8y7Slx2ow
![Page 23: De-risking offshore installation of flexiblesand umbilicals ... Vessel Position (m) Riser Payout (m) A&R Payout (m) Tensioner Load (Tonnes) A&R Wire Load (Tonnes) Riser Minimum Bend](https://reader031.vdocument.in/reader031/viewer/2022030419/5aa5f0597f8b9ac8748dd4b7/html5/thumbnails/23.jpg)
Deck Handling 2nd End From Carousel To Splash ZoneExample
![Page 24: De-risking offshore installation of flexiblesand umbilicals ... Vessel Position (m) Riser Payout (m) A&R Payout (m) Tensioner Load (Tonnes) A&R Wire Load (Tonnes) Riser Minimum Bend](https://reader031.vdocument.in/reader031/viewer/2022030419/5aa5f0597f8b9ac8748dd4b7/html5/thumbnails/24.jpg)
Vertical Lay System – Lift End Fitting Over TowerExample
![Page 25: De-risking offshore installation of flexiblesand umbilicals ... Vessel Position (m) Riser Payout (m) A&R Payout (m) Tensioner Load (Tonnes) A&R Wire Load (Tonnes) Riser Minimum Bend](https://reader031.vdocument.in/reader031/viewer/2022030419/5aa5f0597f8b9ac8748dd4b7/html5/thumbnails/25.jpg)
PLET LaydownExample
AnchorInitiation
Wire
PLET
PipelinePipelay Vessel
PLET
![Page 26: De-risking offshore installation of flexiblesand umbilicals ... Vessel Position (m) Riser Payout (m) A&R Payout (m) Tensioner Load (Tonnes) A&R Wire Load (Tonnes) Riser Minimum Bend](https://reader031.vdocument.in/reader031/viewer/2022030419/5aa5f0597f8b9ac8748dd4b7/html5/thumbnails/26.jpg)
PLET Laydown – Detailed ModelExample
Detailed Model
> Yoke Swivel Model
> Accurate COF and COB
> Detailed Drag Coefficients and Added Mass Estimates
Observation – snatch loading in the initiation wire
![Page 27: De-risking offshore installation of flexiblesand umbilicals ... Vessel Position (m) Riser Payout (m) A&R Payout (m) Tensioner Load (Tonnes) A&R Wire Load (Tonnes) Riser Minimum Bend](https://reader031.vdocument.in/reader031/viewer/2022030419/5aa5f0597f8b9ac8748dd4b7/html5/thumbnails/27.jpg)
PLET Laydown – Simplified ModelExample
Simplifed Model
> PLET modelled simply as a line
> No yoke – initiation wire connected direct to end of PLET element
> Drag and added mass not modelled In detail
> Submerged weight correct
Static configuration correct but poor dynamic analysis
![Page 28: De-risking offshore installation of flexiblesand umbilicals ... Vessel Position (m) Riser Payout (m) A&R Payout (m) Tensioner Load (Tonnes) A&R Wire Load (Tonnes) Riser Minimum Bend](https://reader031.vdocument.in/reader031/viewer/2022030419/5aa5f0597f8b9ac8748dd4b7/html5/thumbnails/28.jpg)
PLET LaydownExample
![Page 29: De-risking offshore installation of flexiblesand umbilicals ... Vessel Position (m) Riser Payout (m) A&R Payout (m) Tensioner Load (Tonnes) A&R Wire Load (Tonnes) Riser Minimum Bend](https://reader031.vdocument.in/reader031/viewer/2022030419/5aa5f0597f8b9ac8748dd4b7/html5/thumbnails/29.jpg)
In Summary….
Crane Block
Tri-Plate / Rigging / Lifting Tool
Buoyancy
End Fitting Bend
Restrictors
.
Reduced Risk
Higher Sea State
Better Definition
Installation Equipment
CoG
Buoyancy Rigging
Hydrodynamic Properties
Bend Restrictors/ Stiffener / Uraduct
![Page 30: De-risking offshore installation of flexiblesand umbilicals ... Vessel Position (m) Riser Payout (m) A&R Payout (m) Tensioner Load (Tonnes) A&R Wire Load (Tonnes) Riser Minimum Bend](https://reader031.vdocument.in/reader031/viewer/2022030419/5aa5f0597f8b9ac8748dd4b7/html5/thumbnails/30.jpg)
www.xodusgroup.com
Thank you
All offshore images kindly supplied by Ocean Installer