Monopile decommissioning demonstration

MONOPILE DECOMMISSIONING DEMONSTRATION IN THE NETHERLANDS

In 2016, the CAPE VLT-320 was used to decommission a monopile with a slip joint connection with a length of 27 meter, weighting 127 ton with a bottom diameter of 4 meter at the Maasvlakte 2 in the Netherlands.

The pile was installed 7 months prior to extraction using the same equipment. The pile served as a foundation for a demonstration turbine.

The monopile was extracted in record time of 11 minutes after which it was down-ended easily, ready to be picked up and transported to the SIF factory to be extended for installation offshore for the next phase in the demonstration project called the Slip Joint Offshore Research project (SJOR).

Application details

Application
Decommissioning
Pile type
Monopiles
Extraction
15m

PILE DETAILS

Pile type
Monopiles
Pile model
Slip joint
Pile length
27.25m
Pile weight
127t
Pile wall thickness
40-60mm
Pile diameter
3.26-4m
No. of piles
1

PROJECT DETAILS

Period
November 2016
Country
The Netherlands
Location
Maasvlakte 2, Rotterdam
Market
Offshore Renewables
System/end usage
Offshore Wind Turbine & Research
Operator or end customer
DOT
Installation contractor
DOT
Type of vessel
Floating sheerleg
Name of vessel and owner
Matador 3, Bonn & Mees
Mode
Anchors

Main Reasons for solution choice

EXTRACTION POSSIBLE

EXTRACTING, LIFTING, DOWNENDING IN SINGLE OPERATION

SELECTED EQUIPMENT

CAPE VLT-320

Equipment configuration
CAPE VLT-320 Single
Eccentric moment
320kgm
Max. line pull
500t
hero_desktop_2880x1620_P0214 – Monopile decommissioning demonstration in The Netherlands_2 hero_mobile_1200x2400_P0214 – Monopile decommissioning demonstration in The Netherlands_2

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