module 3 2012
DESCRIPTION
hóa đại cươngTRANSCRIPT
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Module 3
Offshore Construction
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1. Offshore Construction Contractor
OCC = Specialized construction company that erects and installs
offshore infrastructure for Oil companies.
Local Vietnamese:
International:
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2. Crane Barge
Hoang Sa (600t) Truong Sa (600t)
Crane Barge = Derrick Barge
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3. DSV
Sub sea Construction Vessel
DSV = Diving Support Vessel
DP2 = 2 computer syst.
DP3 = 2+1 back-up
Dynamic Positioning(DP) GPS
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4. Shear leg
Ballasting
Shear Leg = Crane with Fixed A-frame
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5. Supply boat Supplier
PTSC
Supply Vessel = Vessel to transport cargo to and from Platforms
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6. Flat Barge
Dumb Barge or Deck Barge
Used for transport and storage during offshore
construction
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7. Tug boat
Highly maneuverable work horse; thrusters;
Capacity:
Bollard Pull = Pulling force; 30 tons 260 tons
Installed power: 3000 - 26000 Horse power
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8. Anchor Handler
More power full and maneuverable than supplier
More deck space than tugboat
Specialized vessel to layout anchor pattern for Pipe laying Barges or Semi Subs.
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9. Steel Fabrication
Labor intensive,
relatively low tech
Vungtau, VSP
Construction of an metal Offshore Structure
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10. Slings
Soft sling =
Aramide fiber
Lifting gear used for moving objects
Grommet =
endless sl ing
Test certi ficate = 6 months valid
Shackle
Steel wire rope
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11. Load-out
Loading structure on barge for transport to installation site
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12. Skidding
Moving a load by using Hydraulic Jacks
Monkey Climbing
1. Clamp on beam
2. Push object
3. Release clamp cyl inders
4. Retract cyl inder
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13. Launch Barge
Barge that can unload a structure without a crane
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14. Pil ing
Driving steel piles into the ground
Through the leg piles
Above water p iling
Skirt piles
Sub sea piling
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15. Welding
Bonding metal by melting it together
MIG Welding
Welding inspection
Stick or Arc Welding
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16. Leveling
Correct verticality after positioning and piling of
the Jacket
Through the leg jacket
leveling
Skirt piles
Jacket leveling
Leveling tool
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17. Crane Barge
Create permanent connection by in jection concrete after leveling
Grout line
Pile
Grout injection
area
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18. Float over
Installation of topside on jacket using flat barge and jacks
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19. Diving
Performing manual work under water
Ai r div ing = Up to 50 m water depth
Sat diving = from 50 m 400 m
Sat System
Dive bell
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20. ROV
Remotely Operated Vehicle
WROV = Work class ROV
Inspection ROV
Umbilical =
Wire to the
ROV
ROV Pilot
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21. Shift work
24/7 Work schedule
When working offshore most common is a 12 hours shift: 12 hours work, 12
hours rest.
Night shift 6 PM 6 AM
Day shift 6 AM 6 PM
Rotation schedule: 4 weeks on, 2 weeks off
Differs over the world.
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22. Crew change
Workforce is replaced at the end of work period
Rotation schedule: 4 weeks on, 2 weeks off
Crew change normally takes place in the weekends.
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23. Crew boat
Boat to transport oil workers to and from shore
Distances up to 800 km
Speed: max. 30 knots (56 km/hr)
Transfer can take up to 30 hours!
Advantage: large capaci ty, low
costs
Disadvantage: slow
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24. Helicopter
Helicopter to transport oi l workers to and from shore
Distances up to 980 km
Speed: max. 260 km/hr
Advantage: speed
Disadvantage: expensive
BOSIET = Basic Offshore Safety
Induction Emergency Training