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“Changing Industry Demands Redesign the OSV’s”
This paper was first presented at the “ 4th International Conference on Technology and Operation of Offshore Support Vessels OSV Singapore 2011 organised by The Joint Branch of the Royal Institution of Naval Architects and The Institute of Marine Engineering, Science & Technology (Singapore), The Centre for Offshore Research & Engineering, National University of Singapore, and Newcastle University Marine International, Singapore.
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INTRODUCTION
Deeper Waters, newer Hazards
Harsher environment
Larger Rig mooring equipment
Existing generation of OSV’s
Crashing into platforms
Bourbon Dolphin
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NEW RULES AND REGULATIONS
OSV’s carry Noxious Liquids, chemicals, Drill cuttings
> 100 personnel on board, SPS Code
Dynamic Position Keeping
Probabilistic Damage Stability
Crew Comfort
Environmental features
High Capex costs – more than a VLCC
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ANCHOR HANDLING
Existing AH Tugs 150T – 200T BP.
Deeper Waters, Larger Rigs
Require BP > 300 Ton
Winches > 600 Ton Brake Capacity
> 25000 BHP
Robotic AH Cranes
ARF to land large anchors on deck
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ANCHOR HANDLING
1 |The Supply Market
22 May 2012 6
TERM RATES - AHTS
www.fearnleys.com
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10 000
20 000
30 000
40 000
50 000
60 000
70 000
80 000
Term fixture rates - AHTSWorld Wide (US$)
AHTS 7 - 10,000 BHP AHTS 10,000 + BHP AHTS 5 - 6,999 AHTS 7-9,999 BHPAHTS 10-11,999 BHP AHTS 12-16,499 BHP AHTS 16,500 BHP+
© Fearnley Offshore Supply
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TRANSPARENT BOLLARD PULL
BOURBON DOLPHIN DISASTER
Lack of Stability
Overstated BP
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BOURBON DOLPHIN
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SUPPLY SHIPS
Drilling Fluid Technology
Waste cuttings backloads
Hydrogen Sulphide
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Supply
1 |The Supply Market
22 May 2012 11
TERM RATES - PSV
www.fearnleyoffshoresupply.com
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5 000
10 000
15 000
20 000
25 000
30 000
35 000
40 000
45 000
50 000
Term fixture rates - PSVWorld Wide (US$)
PSV USD (3000 dwt+) PSV less than 750m2 deck PSV larger than 750m2 deck
© Fearnley Offshore Supply
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SPS CODE
Subsea Construction and Maintenance
Diving Support
Pipe Laying
Seismic
Research and Training
Well Intervention 200 personnel
Need higher standard of Safety
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CREW COMFORT
Larger number of
crew
Demanding work
Limit Noise and
Vibration levels
Natural Light,
Indoor Climate
Recreation rooms, Gyms,
Min. rest hours
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DYNAMIC POSITIONING Deeper waters subsea pipes no anchor mooring
DP2 more common requirement
Premium on DP vessels
DP3 not mandated
Diving vessels opt for DP3
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FUEL CONSUMPTION
Charterers look for fuel efficiency
Innovative Hull and Propulsion Designs
X-Bow
Hybrid combination of Diesel Mechanical and PTI
Depends on operational profile
Long voyages of supply vessel favor Hybrid
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AH needs high BP - Diesel mechanical straight shaft Diesel Hybrid
Supply vessels need less power but economic steaming
Diesel mechanical and Hybrid have nearly similar consumption
Low Load Longer steaming between platforms Favor Hybrid savings 500T per year
FUEL CONSUMPTION
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FUEL CONSUMPTION
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FUEL CONSUMPTION
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FUEL CONSUMPTION
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FUEL CONSUMPTION
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FUEL CONSUMPTION
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Hybrid propulsion suited for
longer voyages, reduce SOx,
Nox.
LNG will also reduce Nox,
Sox, but storage costs
CLEAN notation imposed by Authorities
GREEN
GREEN TECHNOLOGY
25THANK YOU