Notes
Slide Show
Outline
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CTD Traction Winch System And Motion Compensated Crane
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"The CTD / Cable Issue"
  • The CTD / Cable Issue


  • The DYNACON Solution


  • The Traction Winch Concept And Application


  • Advantages Of Traction Winches vs. Conventional Drum Winches


  • Early Traction Winch Configurations
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"DYNACON Traction Winch"
  •  DYNACON Traction Winch
  • Advancements
    • Design
    • Safety
    • Maintenance
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"The DYNACON Traction Winch In..."
  • The DYNACON Traction Winch In CTD And Oceanographic Applications


  • Integration Of The CTD Traction Winch And Motion Compensated Crane


  • Economic Justification
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The Issue
  • Data Inversion


  • Higher Loads On Traditional Cables


  • Higher Line Speeds To Minimize Time At Sea
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The Issue
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The DYNACON Solution
    • Motion Compensated CTD Handling System
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The DYNACON Solution
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Concept
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The Traction Winch-
When To Consider

  • Cable Breaking Strength @ 25-50% Of Line Load


  • High Sea States


  • Frequent Changes In Ship Speeds


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The Traction Winch-
When To Consider

  • Cable Length And Resulting Weight In Sea Water


  • Storage Properties Of Cable Under High Tension


  • Duty Cycle



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Advantages Over Conventional Drum Winches
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Advantages Over Conventional Drum Winches
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Early Traction Winch Designs
  • Traction sheaves were not cantilevered
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Early Traction Winch Designs





  • Non-Canted Sheaves
  • Single Drives
  • Small Diameter, Vertical Guide Rollers
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DYNACON Design Advancements
  • Cantilevered Sheaves
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DYNACON Design Advancements
  • Canted Sheaves
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DYNACON Design Advancements
  • Independent Drives
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DYNACON Design Advancements
  • Right-Angle Levelwind Eliminates The Need For Small Diameter Guide Rollers
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Safety
  • 12 VDC Control Voltage


  • Spring Center-to-Neutral Control Joysticks


  • Spring Applied, Hydraulically-Released Failsafe Brakes


  • HPU Stop Pushbuttons on Control Enclosures
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Safety
  • Control Systems Interlock


  • Automatic Mode for Single Joystick Operation-Proof of Tension Must be Present


  • Enable Remote Station Only From Local and Only If In Automatic Mode


  • Local Control Joysticks Override Remote Station
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Maintenance
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CTD Traction Winch System
  • Safe Working Loads From 1,800 Kg To 4,500 Kg


  • Line Speeds Up To 1.5 m/s (90 mpm)


  • Storage Winch Drum Capacities Up To 11,000 Meters
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Nodding Boom Crane
  • Minimum Compensated Load 270 Kg
  • Maximum Compensated Load  Up To 4,500 Kg
  • Compensation Range        + 2.5 Meters
  • Slewing Range 200 Degrees
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Nodding Boom Crane
  • “Passive” Heave       Compensation


  • Responds To Changes                   In Line Tension


  • Oil / Gas Accumulator               And Crane Boom Cylinders
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The Next Generation:
  • System Integration
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Flexible Deck Layouts
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Flexible Deck Layouts
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Flexible Deck Layouts
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Flexible Deck Layouts
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Flexible Deck Layouts
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Flexible Deck Layouts
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Economic Justification
  • CTD Cast Time Reduced by 30%


  • Vessel Operating Costs             $20,000-$40,000 Per Day


  • Cost of CTD Unit, 24 Bottle Carousel and 6000 Meters  of 8.18 mm (0.322 in.) Diameter Cable  $150,000