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1
THE OIL SEA HARVESTER SYSTEM AN INTEGRATED
CONCEPT OF TOOLS ON A DEDICATED AND ADAPTED
PLATFORM
2
THE SITUATION

• Large oil spills at sea
• difficulty to act rapidely
• difficulty to operate in a rough sea

3
THE NEED

• A vessel capable to harvest oil at sea in quite
  harsh conditions
• A vessel that can be on site quite rapidely
• A multi-purpose vessel worth to be maintain at
  sea all year long

4
AN INNOVATIVE ANSWER THE PLATFORM

• A TRIMARAN STRUCTURE
• Central hull slender monohull
• Side hulls swath type
• ADVANTAGES
• Monohull
• Course stability
• Reduced pitch motion
• High payload
• Swath
• Roll stability

5
OSH PLATFORM FIRST CONCEPT
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OSH platform Preliminary design within European
funded project

• Some preliminary work at the beginning of the
  project based on updated specification for the
  vessel (WP2) allowed to
• adapt the general dimensions of the ship to the
  project (displacement, storage capacities, )
• eliminate some drawbacks of the original
  conceptual design
• facilitate the integration of the tool carriage
  and of the oil recovery tools
• improve the general performances nautical
  qualities of the platform, efficiency of the oil
  recovery tools in rough weather

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OSH platform Preliminary design

• Major modifications were
• lengthened main hull
• Side hull round section fitted outside the
  channel for easier tool carriage integration
• Total displacement increased to 12000 tons,
  according to the updated weight evaluation.
• Transverse stability GM increase from 1 m to 2
  m, according to stability rules requirements
• Move accommodations forward in order to have more
  room on the aft part dedicated also to
  complementary missions

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OSH platform modifications
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OSH PLATFORM MAIN CHARACTERISTICS
LENGTH 136.60 m ( 10 ) WIDTH 36.00 m (
4 ) FULLY LOADED DISPLASMENT 12000 t (
2000 ) MAXIMUM DRAFT 7.20 m PODS PROPULSION
2 X 13 MW 26. MW TRANSIT SPEED 25
kn RECOVERY SPEED 1 to 3 kn HARVEST
CAPACITY 6000 t RANGE 30
j DISPONIBILITY AT SEA 350 days /
year OPERATIONAL WEATHER LIMIT Sea
state 6/7
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UP TO DATE OSH VESSEL
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AN INNOVATIVE ANSWER THE HARVESTING CONCEPT

• The oil slick penetrates into the two chanels
  between the two sides and the central hull
• These chanels are well protected from the
  external rough weather
• The surface of the oil slick is calmed by
• the narrowness of the chanels
• The oil viscosity
• The residual mono directional sea state into the
  chanels is reduced
• In that choppy sea it becomes possible to recover
  the oil slick with the proper tools fitted on two
  floatable tool carriages

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TOOL CARRIAGE
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OIL SLICK RECOVERY TOOLS
These tools may be fitted according to the
product viscosity They are modular built
types They are fitted on the two floatable
carriages They are stored on board They are
chosen to match with the specific need
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TOOL CARRIAGE AND A TOOL
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COMPLEMENTARY MISSIONS

• Such a vessel would be able to carry out the
  following missions
• The permanent presence at sea 350 d/y
• Search and rescue
• Maritime surveillance
• Solid waste recovery
• Chemical products recovery
• Fire fighting
• Offshore operations which require a dynamical
  positioning by high sea state 6/7
• Pumping from wrecks
• Exploitation of submarines and robots
• Etc

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CONCLUSION

• This concept of platform and associated tools
  dedicated to oil recovery but also complementary
  missions is to allow to
• Operate even in high sea state
• Give assistance to ships in distress
• Arrive very quickly on the catastrophe spot
• Recover efficiently the oil slicks by using the
  more efficient tool
• And so decrease drastically the consequences of
  the oil slicks

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OIL SEA HARVESTER