The Norwegian Lifeboat Project
Per Otto Selnes
Manager Operations
the Norwegian Oil Industry Association   www.olf.no
The Norwegian Lifeboat Project
Where the skeletons kept falling out of the closet


Contents

1. Background

2. Deflection...
1.Background

where it all started




Full scale test offshore
Installation test in summer 2005 with a skid boat gave
maj...
1. Background
Industry cooperation

The Norwegian Oil Industry Association - OLF, on
behalf of its member companies, initi...
1. Background

Comprehensive testing
During a four year programme of
investigations, tests and analysis, several
weaknesse...
1. Background
Shortcomings
Major shortcomings identified in existing
regulations, and in the lifeboats:
Structural weaknes...
1. Background
Results

The outcome of the Norwegian Lifeboat
project (LBP) has lead to proposed remedial
actions for exist...
1. Background
Functional requirements
 The Norwegian authorities amended their regulations
 in the autumn of 2006, and req...
2. Deflection of hatches and superstructure
Unacceptable structural degree of deflection

   Offshore installation tests i...
2. Structure
Hatch after drop
2. Structure
Deflection of superstructure and
support elements after drop
2. Deflection of hatches and superstructure




The findings revealed that the design and
testing requirements to free fal...
2. Deflection of hatches and superstructure




• Realistic tests have been carried out

• All 16 different freefall lifeb...
2. Deflections of hatches and superstructure

Model tank test




The testing program included up to over 20.000 model
tes...
2. Deflections of hatches and superstructure
Model drop
2. Deflections of hatches and superstructure
    Shortcomings with respect to hull accelerations
                         ...
2. Deflections of hatches and superstructure
Reinforcements

It has been necessary to reinforce the
superstructure of 140 ...
2. Deflections of hatches and superstructure
Reinforcements

The reinforcements required have been
made by installing addi...
2. Deflections of hatches and superstructure
Reinforcements shown in animation
3. Accelerations
Safety for lifeboat passengers

The overall purpose has been to provide
a comprehensive assessment of
occ...
3. Acceleration
Safety for lifeboat passengers
The entire research scope has included
• injury biomechanics
• occupant ass...
3. Acceleration
Safety for lifeboat passengers
It has been necessary to develop specific
acceptance injury criteria and li...
3. Acceleration
Applying criteria in start-to-finish evaluations
Full-scale testing    Numerical modeling    Sled testing
...
3. Acceleration
Injury criteria
•   Level 1       No, or only minor, injuries

•   Level 2       Serious injuries may occu...
3. Acceleration

Variations in impact

The impact on the human body from high
accelerations varies not only with drop
heig...
3. Acceleration
Passenger seating matters

Persons seated in seats at the extreme ends
of a boat are generally subject to ...
3. Acceleration

Results

• New acceleration criteria have
  been developed

• Recommendations
    – Temporary seating res...
4. Outward movement
4. Outward movement
The boat has to leave the installation

• Forward distance/speed immediately after water
  entry, thru...
4. Outward movement
Launch directions


Results are given for two launch directions (head seas
and bow oblique seas) and t...
4. Outward movement
           Life boat placement and structure


                                           Engine start...
5. New standard for free fall lifeboats

The new standard is for future
freefall lifeboats on the NCS    OFFSHORE STANDARD...
5. New standard for free fall lifeboats
Content

Safety philosophy and construction
principals
                           ...
6. Summary

Weaknesses on the superstructure was
discovered in one of the 16 types of freefall
lifeboats on the NCS in Jun...
6. Summary
• In addition to the initial discovery, the project scope
  include:
   – investigation of the freefall lifeboa...
6. Summary
The project delivery has been to carry out
extensive model testing and computer
simulations in wind and waves, ...
The Norwegian lifeboat project
The Norwegian lifeboat project
The Norwegian lifeboat project
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The Norwegian lifeboat project

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Best Knowledge Sharing presententation on the SPE's HSE Conferanse 2010.
During a full scale test of a freefall lifeboat on a permanent production installation offshore Norway in June 2005, weaknesses in the superstructure was experienced. The lifeboat had been type approved by Norwegian authorities, based on design and testing requirements in international codes. As a result of the discovery, The Norwegian Oil Industry Association - OLF, on behalf of its member companies, initiated a full investigation of all 16 freefall lifeboat types on the Norwegian Continental Shelf (NCS). During a four year programme of investigations, tests and analysis, several weaknesses have been disclosed. The outcome of the Norwegian Lifeboat project (LBP) has lead to proposed remedial actions for existing lifeboats and the development of a new standard for future freefall lifeboats. The project has been carried out in co-operation with unions, lifeboat manufacturers and authorities. It has been a unique life boat review project, and has reduced the risk of a potential evacuation situation offshore.

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The Norwegian lifeboat project

  1. 1. The Norwegian Lifeboat Project Per Otto Selnes Manager Operations the Norwegian Oil Industry Association www.olf.no
  2. 2. The Norwegian Lifeboat Project Where the skeletons kept falling out of the closet Contents 1. Background 2. Deflections of hatches and superstructure 3. Acceleration – safety for passengers 4. Outward movement 5. New standard for free fall life boats
  3. 3. 1.Background where it all started Full scale test offshore Installation test in summer 2005 with a skid boat gave major deflections of hatches and superstructure
  4. 4. 1. Background Industry cooperation The Norwegian Oil Industry Association - OLF, on behalf of its member companies, initiated a full investigation of all 16 freefall lifeboat types on the Norwegian Continental Shelf (NCS).
  5. 5. 1. Background Comprehensive testing During a four year programme of investigations, tests and analysis, several weaknesses have been disclosed.
  6. 6. 1. Background Shortcomings Major shortcomings identified in existing regulations, and in the lifeboats: Structural weaknesses Acceleration challenges - safety for passengers Outward movement from the installations
  7. 7. 1. Background Results The outcome of the Norwegian Lifeboat project (LBP) has lead to proposed remedial actions for existing lifeboats and the development of a new standard for future freefall lifeboats.
  8. 8. 1. Background Functional requirements The Norwegian authorities amended their regulations in the autumn of 2006, and requested the lifeboat owners to ensure that it is possible… “…to evacuate all personnel on an installation quickly and effectively to a safe area during all weather conditions”
  9. 9. 2. Deflection of hatches and superstructure Unacceptable structural degree of deflection Offshore installation tests in close to calm water carried out in 2005 revealed an unacceptable structural degree of deflection of the roof in one of the 16 types of free-fall lifeboats.
  10. 10. 2. Structure Hatch after drop
  11. 11. 2. Structure Deflection of superstructure and support elements after drop
  12. 12. 2. Deflection of hatches and superstructure The findings revealed that the design and testing requirements to free fall lifeboats issued by UN’s International Maritime Organisation (IMO) are inadequate.
  13. 13. 2. Deflection of hatches and superstructure • Realistic tests have been carried out • All 16 different freefall lifeboat types have been analysed and examined against a set of structural criteria, including suitable load cases and structural safety levels.
  14. 14. 2. Deflections of hatches and superstructure Model tank test The testing program included up to over 20.000 model tests of freefall lifeboats in a wave tank
  15. 15. 2. Deflections of hatches and superstructure Model drop
  16. 16. 2. Deflections of hatches and superstructure Shortcomings with respect to hull accelerations Calm water 50 Hs 15m 45 40 35 30 Max acc 25 20 15 10 5 0 Boat 1 Boat 2 Boat 3
  17. 17. 2. Deflections of hatches and superstructure Reinforcements It has been necessary to reinforce the superstructure of 140 lifeboats, representing 11 of the 16 types.
  18. 18. 2. Deflections of hatches and superstructure Reinforcements The reinforcements required have been made by installing additional beams in order to strengthen the superstructure (canopy), and strengthening the frames of the access hatches and doors.
  19. 19. 2. Deflections of hatches and superstructure Reinforcements shown in animation
  20. 20. 3. Accelerations Safety for lifeboat passengers The overall purpose has been to provide a comprehensive assessment of occupant injury risk during drop conditions in an effort to improve occupant safety.
  21. 21. 3. Acceleration Safety for lifeboat passengers The entire research scope has included • injury biomechanics • occupant assessment criteria • boat hydrodynamics • full-scale testing • model-scale testing • numerical modelling • sensitivity analysis and optimization • sled testing.
  22. 22. 3. Acceleration Safety for lifeboat passengers It has been necessary to develop specific acceptance injury criteria and limits.
  23. 23. 3. Acceleration Applying criteria in start-to-finish evaluations Full-scale testing Numerical modeling Sled testing Injury measurements • Head • Abdomen and thorax • Neck
  24. 24. 3. Acceleration Injury criteria • Level 1 No, or only minor, injuries • Level 2 Serious injuries may occur • Level 3 Injuries with very long recovery time, permanent injuries which significantly can reduce future ability to work, or injuries which may cause death, may occur
  25. 25. 3. Acceleration Variations in impact The impact on the human body from high accelerations varies not only with drop height, but more importantly with wave height and direction, and also the loading (weight) of the boat.
  26. 26. 3. Acceleration Passenger seating matters Persons seated in seats at the extreme ends of a boat are generally subject to higher impact than if seated in the middle.
  27. 27. 3. Acceleration Results • New acceleration criteria have been developed • Recommendations – Temporary seating restriction – Permanent improvements of belts – Modification of the FF1000D type
  28. 28. 4. Outward movement
  29. 29. 4. Outward movement The boat has to leave the installation • Forward distance/speed immediately after water entry, thrust and steering capacity have been evaluated up to a 100-year weather condition. • Final results are given as contour plots for four sea states representing the Norwegian Sea
  30. 30. 4. Outward movement Launch directions Results are given for two launch directions (head seas and bow oblique seas) and two values of time for start propeller after water entry (5s and 10s).
  31. 31. 4. Outward movement Life boat placement and structure Engine start 10 sec. after water impact Lifeboat closest to the structure + Structure Structure
  32. 32. 5. New standard for free fall lifeboats The new standard is for future freefall lifeboats on the NCS OFFSHORE STANDARD Reinforcement an restrictions make exciting lifeboats safe
  33. 33. 5. New standard for free fall lifeboats Content Safety philosophy and construction principals OFFSHORE STANDARD Loads and load effects Materials – choices and qualification Structure/construction Operational specifications Safety and comfort for passengers Model and full scale testing
  34. 34. 6. Summary Weaknesses on the superstructure was discovered in one of the 16 types of freefall lifeboats on the NCS in June 2005, a joint industry project was established in the Norwegian Oil Industry Association
  35. 35. 6. Summary • In addition to the initial discovery, the project scope include: – investigation of the freefall lifeboats wrt. to hull strength, G-forces impact on personnel on board, outward movement from the installation; – investigation of conventional lifeboats and launching arrangements – a specification for freefall lifeboats being built whilst the project is underway – A new standard for future freefall lifeboats on the NCS
  36. 36. 6. Summary The project delivery has been to carry out extensive model testing and computer simulations in wind and waves, full scale tests in water, strength analysis and to issue recommendations to the lifeboat owners on actions required to comply with the Norwegian regulations Unions have made important contributions throughout the project

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