20
DECOMMISSIONING Mark Couwenberg Naval Architect Damen Offshore & Transport 12 May 2017

DECOMMISSIONING - KIVI45... · 2017-05-29 · DECOMMISSIONING PROCESS BACKGROUND Late life platform operations Site remediation Heavy Lift & Transport Shutting down Production & Decontamination

  • Upload
    others

  • View
    4

  • Download
    0

Embed Size (px)

Citation preview

Page 1: DECOMMISSIONING - KIVI45... · 2017-05-29 · DECOMMISSIONING PROCESS BACKGROUND Late life platform operations Site remediation Heavy Lift & Transport Shutting down Production & Decontamination

DECOMMISSIONINGMark Couwenberg – Naval Architect Damen Offshore & Transport

12 May 2017

Page 2: DECOMMISSIONING - KIVI45... · 2017-05-29 · DECOMMISSIONING PROCESS BACKGROUND Late life platform operations Site remediation Heavy Lift & Transport Shutting down Production & Decontamination

FEELINGS

Page 3: DECOMMISSIONING - KIVI45... · 2017-05-29 · DECOMMISSIONING PROCESS BACKGROUND Late life platform operations Site remediation Heavy Lift & Transport Shutting down Production & Decontamination

BACKGROUND THE VESSEL THE FUNCTIONS PARTNERS

AGENDA

Page 4: DECOMMISSIONING - KIVI45... · 2017-05-29 · DECOMMISSIONING PROCESS BACKGROUND Late life platform operations Site remediation Heavy Lift & Transport Shutting down Production & Decontamination

BACKGROUND

BACKGROUND

Page 5: DECOMMISSIONING - KIVI45... · 2017-05-29 · DECOMMISSIONING PROCESS BACKGROUND Late life platform operations Site remediation Heavy Lift & Transport Shutting down Production & Decontamination

OLSO – PARIS CONVENTION

BACKGROUND

Decision 98/3 on the disposal of disused Offshore Installations:

The dumping, and the leaving wholly

or partly in place, of disused offshore installations within the maritime area is

prohibited.

Page 6: DECOMMISSIONING - KIVI45... · 2017-05-29 · DECOMMISSIONING PROCESS BACKGROUND Late life platform operations Site remediation Heavy Lift & Transport Shutting down Production & Decontamination

DECOMMISSIONING PROCESS

BACKGROUND

Late life platform

operationsSite remediation

Heavy Lift &

TransportShutting down Production &

DecontaminationSuspension

Rundown to COP

Well Shut-in

Hot to Cold

Suspension ColdRemoval &

Transportation

Continued Liabilities

From: http://www.atlanticmo.com/assets/images/DecommissioningProcess.png

Page 7: DECOMMISSIONING - KIVI45... · 2017-05-29 · DECOMMISSIONING PROCESS BACKGROUND Late life platform operations Site remediation Heavy Lift & Transport Shutting down Production & Decontamination

THE MARKET

BACKGROUND

From Infield: Offshore structures North-Sea < 1600 ton

Page 8: DECOMMISSIONING - KIVI45... · 2017-05-29 · DECOMMISSIONING PROCESS BACKGROUND Late life platform operations Site remediation Heavy Lift & Transport Shutting down Production & Decontamination

THE MARKET

BACKGROUND

From Infield: Number of Offshore structures Southern North-Sea to be removed per year

Page 9: DECOMMISSIONING - KIVI45... · 2017-05-29 · DECOMMISSIONING PROCESS BACKGROUND Late life platform operations Site remediation Heavy Lift & Transport Shutting down Production & Decontamination

In common:

Aiming at very large platforms

And / or very small operation window

TOPSIDE LIFTING - TODAY

BACKGROUND

Pioneering Spirit Versabar 10000 All sorts of reverse

Installation operations.

Small-piece removal

Page 10: DECOMMISSIONING - KIVI45... · 2017-05-29 · DECOMMISSIONING PROCESS BACKGROUND Late life platform operations Site remediation Heavy Lift & Transport Shutting down Production & Decontamination

THE VESSEL

MAIN REQUIREMENTS

Capable of lifting of offshore topsides <1600 tons

Low-cost

Regions:

Primarily North Sea

Spin-off to other regions

Preferred lifting method: from below

Good operability

Suited for other functions in the decom chain as well

Page 11: DECOMMISSIONING - KIVI45... · 2017-05-29 · DECOMMISSIONING PROCESS BACKGROUND Late life platform operations Site remediation Heavy Lift & Transport Shutting down Production & Decontamination

THE VESSEL

MAIN CHARACTERISTICS

Loa: 95mBoa: approx. 43m

Column-stabilized semi-submersible.Result: very low motions

55 cabins; suitable for 70 –100 persons on board.Easily expandable

Azimuth propulsionSelf-propelledClosed-bus DP-2, DP-3

1100 m2 free deck areaStrengthened for wheeled loads

Motion-compensatedtopside lifting system

Offshore auxiliary crane

“Portable” equipment: offshore gangway ROV-LARS …

Lifting capacity: 1600 tons at 30m above sea levelWeather conditions during lifting: Hs 2m (Sea state 4)Station keeping performance: Hs 3.5 m (Sea state 5)Free sailing speed: 10 kn

Page 12: DECOMMISSIONING - KIVI45... · 2017-05-29 · DECOMMISSIONING PROCESS BACKGROUND Late life platform operations Site remediation Heavy Lift & Transport Shutting down Production & Decontamination

THE VESSEL

WHY A SEMI-SUB?

SEMI-SUBMERSIBLEMONO HULL

Page 13: DECOMMISSIONING - KIVI45... · 2017-05-29 · DECOMMISSIONING PROCESS BACKGROUND Late life platform operations Site remediation Heavy Lift & Transport Shutting down Production & Decontamination

THE VESSEL

THIS IS…

Not the largest

Not the strongest

Not a down-scaled Pioneering Spirit

But: Efficient for the lower end of the market

Page 14: DECOMMISSIONING - KIVI45... · 2017-05-29 · DECOMMISSIONING PROCESS BACKGROUND Late life platform operations Site remediation Heavy Lift & Transport Shutting down Production & Decontamination

THE FUNCTIONS

THE

FUNCTIONS

Page 15: DECOMMISSIONING - KIVI45... · 2017-05-29 · DECOMMISSIONING PROCESS BACKGROUND Late life platform operations Site remediation Heavy Lift & Transport Shutting down Production & Decontamination

THE

FUNCTIONS

THE DECOM PROCESS

Late life platform

operationsSite remediation

Heavy Lift &

TransportShutting down Production &

DecontaminationSuspension

Rundown to COP

Well Shut-in

Hot to Cold

Suspension ColdRemoval &

Transportation

Continued Liabilities

From: http://www.atlanticmo.com/assets/images/DecommissioningProcess.png

Page 16: DECOMMISSIONING - KIVI45... · 2017-05-29 · DECOMMISSIONING PROCESS BACKGROUND Late life platform operations Site remediation Heavy Lift & Transport Shutting down Production & Decontamination

Lifting and tilting jackets for complete removal

From: DECOM North Sea – alternative

decommissioning options – Rigs To Reef

a) Leaving jacket in place

b) Tilting and sinking

c) Cutting the upper part and placing it on the

sea bed

d) Towing to another location and tilt / sink it

JACKET HANDLING

OTHER TASKS

Page 17: DECOMMISSIONING - KIVI45... · 2017-05-29 · DECOMMISSIONING PROCESS BACKGROUND Late life platform operations Site remediation Heavy Lift & Transport Shutting down Production & Decontamination

OTHER TASKS

SUBSEA OPERATIONS

Page 18: DECOMMISSIONING - KIVI45... · 2017-05-29 · DECOMMISSIONING PROCESS BACKGROUND Late life platform operations Site remediation Heavy Lift & Transport Shutting down Production & Decontamination

OTHER TASKS

LIGHT (DE)CONSTRUCTION

Page 19: DECOMMISSIONING - KIVI45... · 2017-05-29 · DECOMMISSIONING PROCESS BACKGROUND Late life platform operations Site remediation Heavy Lift & Transport Shutting down Production & Decontamination

WHERE ARE WE?

CONCLUSION

What do we have:

Concept design for a versatile offshore lift vessel

It fullfills main market demand for efficient

topside removal

Capable of many other offshore tasks

What’s next:

Further development with market partners

Page 20: DECOMMISSIONING - KIVI45... · 2017-05-29 · DECOMMISSIONING PROCESS BACKGROUND Late life platform operations Site remediation Heavy Lift & Transport Shutting down Production & Decontamination

THANKS FOR YOUR ATTENTION

END