Fugro Seacore Ltd Developments in XL Drilling for ...... Our fleet of pile top drill rigs •We own...
Transcript of Fugro Seacore Ltd Developments in XL Drilling for ...... Our fleet of pile top drill rigs •We own...
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Fugro Seacore Ltd Developments in XL Drilling for Monopiles/Shafts used in the offshore energy sector. June 2014
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FUGRO SEACORE COMPANY PROFILE
Seacore was formed in 1976 Acquired by Fugro in 2007 Approximately 500 employees Sales in 2013 were approximately £100m
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FUGRO SEACORE PROFILE o We are a Cornish Company o Built around local skill base - Mining, Fishing o 7 acre purpose built facility in Falmouth o Design, Build and Operate all our own
equipment and plant. o We are a Global business
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OVER 35 YEARS EXPERIENCE IN OVERWATER DRILLING
6” Ø Drilling - 1984 6m Ø Drilling - 2008
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Our fleet of pile top drill rigs
•We own and operate the largest known fleet of specialist pile top rigs within the market. •All are fully containerised and modular. •Flexible reconfiguration for each and every project. •They provide cost effective solutions for a variety of marine drilling/piling requirements. •Capable of drilling shafts from half a metre to seven metres in diameter. T 8
T8 T40
T90
Hereema
T120
T40 SL T10
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Fugro Seacore Drill Fleet
T3 T5 T8 T10 T10 T40 T40 T120 T90 Bespoke
Mk 1 Mk 2 Mk 1 Mk 2
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FUGRO-LARGE DIAMETER DRILLING RECORD
Between 1987-2013 Quantity
0.5m Dia-2.0m Dia 1358
2.0m Dia – 4.0m Dia 245
4.0m Dia – 6.0m Dia 102
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Offshore Windfarms
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Tidal Turbines
Date
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Wave Energy Convertors
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COOLING WATER INTAKE/OUTFALLS
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What we do-Overwater Drilling
Quick Guide to Reverse Circulation Drilling
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Principle of Reverse Circulation Drilling
The T40 drilling on the Oyster Project
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Installing the Equipment
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Add weight and pipe
Lowering BHA through the doors of the drill deck
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Connect Power & Air-Commence Drilling
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Drill pipe added as drilling progresses
A drill pipe in the rod basket ..
connected to the swivel ..
and lifted out.
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To Create a Socket in the Seabed
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To Create a Socket in the Seabed
View of drill bit
Inside casing Drilled Socket in Rock
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XL Drilling for OWF foundation Installation
Development of XL Drilling-4.0m Diameter and above
Monopile Installation-Up to 30m Water Depth and beyond?
Drive/ Drill/ Drive Methodology
For European Offshore Wind Market
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Drive/Drill/Drive Technique for Monopile Installation
ROCK ROCK ROCK
O/BURDEN O/BURDEN O/BURDEN
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BASIC INDUSTRY ECONOMICS-TIME IS MONEY
Typical Equipment Day Cost for Drive/Drill/Drive
Jack-up Barge 50-100k Marine Plant (tugs & Barges 10k Hammer 20k Drill 10k Other Equipment (lifting tools etc) 10k
TOTAL 100-150k Or £4,167/Hr (£6,250/Hr)
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First Project-North Hoyle OWF-2003
First Drive/Drill/Drive project 4m Diameter Piles Mudstone Average Drill Rates: 450mm/hr
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Drilling Cost relative to today’s Plant & Equipment
Based on 20m of Drilling
450mm/hr = 45hrs Mob = 6hrs DeMob = 6hrs TOTAL 57hrs
57 hrs @ £4,167 =£237,520
Very sucessful project overall cost £125/MW/installed-going the right way In 2003 the concern was that we need to scale up to 6.0m + Diameter (North Hoyle turbines 2.3 MW-the future 5-6 MW) This will be over 2.5 times the area drilled at 4.0m Diameter. Can cost effective drill rates be achieved at this scale. How can we prevent Mob/Demob times increasing due to larger heavier
items lifted by larger slower cranes.
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Our next Challange: Flamanville EPR 2006
Create a 5.85m internal diameter shaft 63m deep
Ground: Iron infused rock
Will require the worlds largest Reverse Circulation Drill
Down hole equipment capable of drilling to a max of 6.45m dia
Large Diameter Overwater Drilling, Casing Stabilisation, Innovative Solution, High Quality HSEQ standards
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BACK TO THE DESIGN DEPARTMENT
■ Foundation Drilling ■ Jack Up design■ Bespoke Equipment ■ Innovative Solutions Project Specific Equipment■ Continuous development through operation
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Fugro Seacore 6.45m Drill Bit
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Flamanville EPR-The Result Drilled 6.45m diameter socket ahead of a 6.3m diameter steel casing via under reaming
Proceed to drill a 5.85m Diameter Shaft 63m deep.
Average Drill Speed 300mm/hr
Important Lessons Learnt.
We need:
Better Bit Face Flow/Cleaning.
Faster rotation
More weight & More Torque to cope
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4.3 m Bit opening out to 6.5m.
Ground- Mudstone similar to previous North Hoyle project
The Plan
Adapt the Flammanville Equipment
Add Water Jetting
Add Weight
Increase Speed, Torque
Improve Mob/DeMob times
Drive/Drill/Drive-Gyn-Y-Mor OWF, Irish Sea 2013
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T90-GyM Drilling Equipment
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Gwynt Y Mor OWF 2013/14
The Results
Faster drilling at 6.0m Dia than we had achieved at 4.0m Dia-Averaging 575mm/h
Peak at 2.2m/hr in softer ground GyM Bottom Hole Assembly
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Drilling Cost based on Plant & Equipment
Based on 20m of Drilling
575mm/hr = 35hrs Mob = 6hrs DeMob = 6hrs TOTAL 47hrs
47 hrs @ £4,167 = £195,850
This is approx. £40,000 less than the relative drilling cost in 2003 even
though we are now over 2.5 times the diameter.
But the engineering never stops...........
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WesterMost Rough OWF 2014
New Drill-more powerful T120 New 7.0m Bit design-improved spoil
removal Modular Conductor-Road Transportable Conductor allows vertical storage of Drill
bit Single mount/demount installation
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T120-Modular Conductor & 7m Diameter Drill Bit
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The Current Offshore Wind Industry
Aim-£100/MW installed
Present-Approx. £150/MW
Offshore Wind is still developing
We need to keep engineering solutions……………
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For Instance:-
If drilling is included in the methodology from the start Reduced hammer size required-this is a reduced day cost and gives more
availability Reduced stresses on pile-less fatigue-longer life or reduced design. Less noise – always an environmental issue. OR YOU CAN: Install piles into drilled rock sockets-No hammer cost You will have shorter piles-less material cost Deliver the piles floating and buoyant lift-reduce crane and Jack-up size and
cost.
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Thank You