Post on 09-Sep-2018
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Seismic Vessels
SeismicWorkboats
Born to be the leading global supplier of SeismicWorkboats, SWB brings the best available technologiesand materials into the market.
Strategic partnerships with Top leading Compositecompanies and Seismic equipment manufacturersallowed the SWB Engineering Team to design anddevelop a new concept.
SWB 9200
Seakeeping• Stability much above average for a
vessel of this size to sail with wavesboth front and sideways .
• Directional stability due to keel shape
• Ease of working at 1 knot and 20 knotsdue to controllable pitch propeller .
• Ability to rotate 360 ° and easily swaydue to the bow thruster andcontrollable pitch propeller .
Design for operation
• Ergonomy• Wheelhouse,
• Streamer operation
• Deck space
• Confort• Suspension Seat
• Visibility• Rotating windows
Workboat capsizeSource: International Association of Geophysical Contractors
Stability
StabilityIncrease of cable lifter capacity to 1000kg (with the dynamic safety factor which means
1400kg).
No water ballast, preventing this way human/machine error
Development: To ensure a safe operation, an optional decision support tool (cLMS) for the
coxswain can be installed:
cLMS – Continuous Loads Monitoring System
– Cable Lifter (vertical load)
– Lifting Frame(vertical load)
– Towing (horizontal load)
StructureMaterials: Superior mechanical properties (reinforcements are in carbon fiber) calculationswere made by Gurit,a top leading composite company that design military boats, SAR etc.
Foundation calculations for streamer winch and cable lifter were madewith SOLAS requirements.
Rules: DNV High Speed, Light Craft and Naval Surface Craft rules, which are better and moredemanding that normal DNV craft 2.21 rules.
Additional safety factor of 1.5 for slamming loads
SOLAS
6.1.1.6
Structural members and all blocks, falls, padeyes, links,
fastenings and all other fittings used in connection with
launching equipment shall be designed with a factor of
safety on the basis of the maximum working load
assigned and the ultimate strengths of the materials used
for construction.
A minimum factor of safety of 4.5 shall be applied to all
structural members, and a minimum factor of safety of 6
shall be applied to falls, suspension chains, links and
blocks.
Streamer WinchWinch type 1-KA-1,8/1400-AHB in aluminium andstainless/acid proof steel
Fixed drum with internal fitted driving gear.Automatic hydraulic brake. Brake can also be released by means of stainless steelmanual hand pump.Hand rails for protection of falling into drum. Aux winch fitted to towing beam abowe drum. Reinforced winch frame and lifting beam for 8t Henriksenhook. 8t SWL certified lifting point for lift of vessel.
SOLAS requirements : tested at 2,2 x SWL. Drum measures:
D = 1700 mmd = 1400 mmL = 1000 mm
Pulling force first layer : 1.8 ton at 250 barPulling force second layer : 1.6 ton at 250 barPulling speed first layer : 75m/min at 78 liter/minBrake power fisrt layer : 2.2 tonn
Gear: PWD3150Motor: Motor Volvo F12-V30 Cartrige
Lifting Gear
The Integrated Henriksen System is
designed to enhance the safety during
the launch of a Seismic Workboat.
Integrated Henriksen System (IHS)
Cable Lifter
Type 3 - lifts 615kg at 200Bar
Type 5 - lifts 1000kg at 210bar
Propulsion• 4-stroke direct injected, turbocharged and aftercooled
• 6 cylinders
• Emission compliance: IMO NOx, EU RCD, US EPA Tier 3
Propeller and Steering
Hydraulic Bow Thruster
Performance and specifications:
Heavy duty thrust 220 kg
Hydraulic power 18,7 kW / 25,1 Hp
Propeller4-blade RH in NiAlBr ISO class S with skew Ø750 mmFlange towards gearbox, HS80IVE 2.49:1
RudderStainless steel w/shaftRudder tube in brassTiller in steel
Confort on Board• Noise and VibrationsNoise
In the circumstances that occur on board ship, where personnel move from one place to another and the length
of time spent in each place may vary, they may be exposed to different levels of noise throughout the day. The
following figures give a guide to the acceptable maximum daily noise doses for unprotected ears, based on dB(A)
sound energy received.
less than 80 dB(A) no limit (24 hours)
82 dB(A) for 16 hours
85 dB(A) for 8 hours
90 dB(A) for 2 hours
95 dB(A) for 50 minutes
100 dB(A) for 15 minutes
105 dB(A) for 5 minutes
110 dB(A) for 1 minute
Noise on current traditional workboats varies from 90 to 110dB(A).
SWB developed and applied a wide range of equipment's and materials to reduce noise on board. Predicted
noise on board is less than 82dB(A).
60
65
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100
105
110
1000 1500 2000 2500 3000
No
ise
[dB
(A)]
Engine Speed [RPM]
9m
Confort on Board• Noise and VibrationsVibrations
Exposure limit values for Vibrations according to European DIRECTIVE 2002/44/EC OF THE EUROPEAN
PARLIAMENT AND OF THE COUNCIL of 25 June 2002 on the minimum health and safety requirements regarding
the exposure of workers to the risks arising from physical agents (vibration) (sixteenth individual Directive within
the meaning of Article 16(1) of Directive 89/391/EEC) gives the limit values.
Article 3:
Exposure limit values and action values
1. For hand-arm vibration:
(a) the daily exposure limit value standardised to an eight-hour
reference period shall be 5 m/s2;
Vibration on current traditional workboats achieves 6 m/s2. This is another item which SWB engineering team and
partners mitigated.
0,00
1,00
2,00
3,00
4,00
5,00
6,00
1500 2000 2500 3000
Vib
rati
on
[m
/s^2
]
Engine Speed [RPM]
9m
APP-cN&V
• Fender innovationTop quality fenders were selected. With exceptional performance and light weight materials.Fender specifications: Fender shape hull fender: H=200mm, W=180mmFender shape lower fender: H=150mm, W=100mm L=4500mm, Hybrid foam core 45-100kg/m3 4x area 500mm to strap the vessel tightly to the mother ship, foam core100-165kg/m3 1 layer technical fabric 1000gr/m2 6mm FI55 top coating textured Total weight ±120kg
Fenders
SWB D8 WaterJet- Concept