FPSO Requirements

FPSO’s & DNV

EOCBR 514 – Newbuildings and Conversions
Marcelo Spotorno
Rio de Janeiro, 16.07.2009

More than 140 years of managing risk
 Det Norske Veritas (DNV) was established in 1864 in Norway
 The main scope of work was to identify, assess and manage risk
– initially for maritime insurance companies

© Det Norske Veritas AS. All rights reserved 28 September 2011 Slide 2

300 offices in 100 countries

Head office Local offices


Our people – a vital resource
 People are the core of DNV  9000 employees  97 nationalities


FPSO – Market share

Vietnam
1%

Rina Unknown
CCS 1% 6%
1% ABS
35 %
BV
4%

LR
12 %

DNV
40 %
Source:
- Mobile Production systems of the World, 7th Edition, 2007/2008, Clarkson Research Services Limited
- Floating Production Systems - assessment of the outlook for FPSO vessels, production semis, TLPs
and Spars, November 2007, International Maritime Associates Inc.


Petrojarl I
 the world’s first FPSO built for harsh environment(1986)


First FPSO GoM
 BW Yùum K’ak’Náab


Cascade Chinook / First FPSO for US GoM
Chinook Cascade
 First FPSO for US GoM


FPSOs/FSOs Newbuildings & Conversions

BP Skarv-Idun Korea-Samsumg Newbuilding

BW Pioneer - Cascade/Chinook Singapore Conversion
Nexus 01 Korea-Samsumg Newbuilding
Nexus 02 Korea-Samsumg Newbuilding
P-58 - Baleia Azul Singapore Conversion
Sevan 300 No. 04 China-Hantong Newbuilding
Sevan 300 No. 05 China-Hantong Newbuilding
Ichtys FPSO - Newbuilding
FSO Rita Dubai Conversion
Dynamic Producer Singapore Conversion
Knock Dee FSO Dubai Conversion
Deep Producer Singapore Conversion


”DNV classed units” around the world
North Sea:
FPSO: 18
Canada:
FPSO: 1

North Africa:
FPSO: 2
Gulf of Mexico:
FPSO: 2

West Africa:
Asia and Australia:
FPSO: 12
FPSO: 15

Brazil:
FPSO: 3


FPSO’s – DNV fleet in Brazil
 SSP300 - Sevan Piranema

 Petrojarl Cidade de Rio das Ostras

 BW Cidade de São Vicente


DNV Offshore Standards


Benign Waters
 DNV OS-C-102 - Structural Design of Offshore Ships
- World-wide operation
- Benign waters - Environments at which the required to hull girder capacity
calculated according to the LRFD method is less than the minimum section
modulus according to the ‘Main Class Requirements’.


Benign Waters
 Alternative design procedures
- Alternative 1 - Ship Rules - The hull scantlings are based on the “main class
requirements”.No direct calculations of wave bending moments and shear
forces are required.
- Alternative 2 - LRFD method - The hull is designed according to the principles
given in Ch.1. The midship section modulus may be less than the ”main class
requirements”. When design Alternative 2, LRFD method, is applied, the
minimum midship section modulus according to the ”main class requirements”
may be reduced by maximum 25%.


P-58 - Nauticus Construction

Default

Innerstructure

Outershell

Thickness map

Material map


Information – dimensions and steel grades
 You get an over-view from colour
display and printed numbers.
 Gives you access to the dimensions
and steel grades of plates, stiffeners
and girders
 Byclicking the structural parts you get
more details


Maintenance – Steel renewal / weight

Marking up all plates and/or
stiffeners within a 3D zone by Plates and stiffeners can be marked
defining and extruding a polygon up independently by using separate
zones


Maintenance – Coating Area Calculations

Marking up single structures for
Marking up all structures for
partial coating: top, one side (gray on
complete or part of the compartment
aft side means not coated)

Maintenance – Docking specifications
 Planning and cost
control prior/during a
docking of a vessel.
 Specification or for
verification purposes
of the figures given
by the ship repair
yard.


Maintenance – Emergency Repairs

 Facilitates
the
documentation of damage:
- Location
- Extent
- Type of structure
 Noneed for long and
complex descriptions.
 Enables overview and
control the expenses.


Monitoring - Coating Monitoring Tool
 The Nauticus Coating
Monitoring Tool takes
advantage of 3D technology to
visualise the coating status
and calculate re-coating areas.
The tool also supports a
structured recording of coating
inspection results referring to
pre-defined cells/bays of the
ballast tanks. Finally, it assists
you in preparing the re-coating
specification and estimates the
costs.
 When tool is used one has
stop to take a risk of
unpredicted situations in
respect to mintenance or
failure.


Monitoring – UTM

This improves UTM measurement support improved
Thickness process: shorter time,
quality and communication, input to maintenance
The Nauticus UTM Tool improves planning, execution and
strategy: of ultrasonic thicknesslower cost
evaluation better control and measurements.


Management – Maintenance Strategy
Set of UTM readings The curve shows tendency
from previous years of steel diminution within
the years and can be used
for prognosis
Trend Curve

25%
t dim

Thickness Diminution
20% t sub
t min
15%

10%

5%

0%
1983 1988 1993 1998 2003 2008 2013
Years

Coating Condition Status

Training – Naming of Structure


Training – Areas of Attention
“Risk Based Inspection” with Focus on ”Critical Areas”

Inspection of upper hopper knuckle especially
in way of trv. web frames

Inspection of lower hopper knuckle especially
in way of trv. web frames


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