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1 Offshore: groter, sneller, efficiënter 10 november 2011 ‘s-Hertogenbosch

Offshore: groter, sneller, efficiënter

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Page 1: Offshore: groter, sneller, efficiënter

1

Offshore: groter, sneller,

efficiënter

10 november 2011

‘s-Hertogenbosch

Page 2: Offshore: groter, sneller, efficiënter

Offshore W

ind Installation

Experienced, Safe, Reliable

Avans H

ogeschool 10 N

ovem

ber 2011 –

“Offshore

: gro

ter, s

nelle

r, e

ffic

iënte

r””

Jan-P

ete

r B

reedeveld

Page 3: Offshore: groter, sneller, efficiënter

Index

1)

Introduction S

HL

2)

Com

parison O

il &

Gas

3)

Case s

tudy

�G

reate

r G

abbard

�S

heringham

Shoal

4)

Jacket in

sta

llation

5)

Turb

ine insta

llation

6)

Substa

tion insta

llation

7)

To c

onclu

de

3

Page 4: Offshore: groter, sneller, efficiënter

4

SHL Installation

Experienced, Safe, Reliable

�20 y

ears

of in

sta

llation e

xperience in O

il &

Gas a

nd O

ffshore

Win

d m

ark

et

�O

ver 140 p

latform

s a

nd o

ver 200 foundations insta

lled (80%

North

Sea)

�O

wn a

nd o

pera

tes m

onohull

cra

ne v

essels

Sta

nis

lav Y

udin

(2,5

00 m

T) and

Ole

g S

trashnov (5,0

00 m

T) and k

ey

insta

llation e

quip

ment, s

uch a

s p

iling

ham

mers

�E

xtensiv

e in-h

ouse e

ngin

eering e

xpertis

e a

nd e

xperienced o

ffshore

cre

w

�O

ffering lum

p-s

um

, fixe

d p

rice c

ontracts

(fu

ll w

eath

er risk taken b

y S

HL)

�D

eliv

er a s

afe

, sound, re

liable

and e

conom

ic o

ffshore

insta

llation s

olu

tion

based o

n a

n a

s-insta

lled c

ost basis

Page 5: Offshore: groter, sneller, efficiënter

5

SHL Premises

Cyp

rus O

ffic

e L

imassol

Neth

erlands O

ffic

e Z

oete

rmeer

Page 6: Offshore: groter, sneller, efficiënter

SHL installation equipment; perfect for

foundation and substation installation

�2,5

00 m

T revolv

ing c

apacity

�Length

183 m

/ B

readth

36 m

/ 1

40 p

ob

�2,5

00 m

2deck s

pace

�5.5

m m

inim

um

dra

ught

�A

nchors

�5,0

00 m

T revolv

ing c

apacity

�Length

183 m

/ B

readth

47 m

/ 2

20 p

ob

�4,0

00 m

2deck s

pace

�8.5

m m

inim

um

dra

ught

�A

nchors

and D

P 3

Stanislav Yudin

Oleg Strashnov

6

Page 7: Offshore: groter, sneller, efficiënter

SHL owns all key installation equipment

�H

ydra

ulic

piling h

am

mers

�IH

C S

-500

�IH

C S

-600

�IH

C S

-900

�IH

C S

-1200

�IH

C S

-1800

�P

ile top d

rill

rig

�400 m

T levelling tools

�In

tern

al pile

lifting tools

(up to 8

4”)

�S

lings a

nd (hydra

ulic

) shackle

s

7

Page 8: Offshore: groter, sneller, efficiënter

8

An impressive client portfolio

EGPC

Page 9: Offshore: groter, sneller, efficiënter

9

SHL Footprint on the Globe

Page 10: Offshore: groter, sneller, efficiënter

Solid offshore wind track record

Project

Scope

Gre

ate

r G

abbard

Foundations, S

ubsta

tions a

nd M

et M

ast

Sheringham

Shoal

Foundations a

nd S

ubsta

tions

Bork

um

West II

Tripods a

nd S

ubsta

tion

Riffg

at

Foundations a

nd S

ubsta

tion

Thanet

Substa

tion

Dan T

ysk

Substa

tion

Meerw

ind

Substa

tion

Nord

see O

st

Substa

tion

Gw

ynt y

Môr

Substa

tions

Anholt

Substa

tion

10

Page 11: Offshore: groter, sneller, efficiënter

SHL provides safe and fast solutions for

monopile and jacket installation

Note

: “d

ura

tions”are

inclu

din

g a

.o. w

eath

er, tra

nsport, le

velli

ng, gro

uting a

nd b

reakdow

n

11

Page 12: Offshore: groter, sneller, efficiënter

Wind Energy Potential

12

Page 13: Offshore: groter, sneller, efficiënter

Wind Energy Potential

13

Page 14: Offshore: groter, sneller, efficiënter

SHL to strengthen their position in the

offshore wind m

arket in cooperation

�M

arine c

ontracto

r fo

r th

e w

hole

offshore

tra

nsport a

nd insta

llation s

cope!

�O

ffer lu

mp-s

um

insta

llation c

ontracts

in the o

ffshore

win

d m

ark

et

�Fix

ed p

rice p

er in

sta

llation

�D

rives innovation a

nd im

pro

vem

ent (industria

lise / low

er costs

)

�E

nte

r in

to a

Long T

erm

Fra

mew

ork

Contract w

ith U

tilit

ies / D

evelo

pers

�Join

tly

develo

p m

ost effic

ient in

sta

llation c

oncept (e

arly

involv

em

ent)

�In

vest in

(purp

ose b

uild

) in

sta

llation e

quip

ment if required

�M

anagem

ent of oth

er vessels

/ s

erv

ices

14

Page 15: Offshore: groter, sneller, efficiënter

Index

1)

Introduction S

HL

2)Comparison Oil & Gas

3)

Case s

tudy

�G

reate

r G

abbard

�S

heringham

Shoal

4)

Jacket in

sta

llation

5)

Turb

ine insta

llation

6)

Substa

tion insta

llation

7)

To c

onclu

de

15

Page 16: Offshore: groter, sneller, efficiënter

We all started the same…

Offshore locations

Offshore

oil

and g

as

Offshore

win

d

16

�N

ear shore

�M

inim

um

wate

r depth

�S

heltere

d a

reas

Page 17: Offshore: groter, sneller, efficiënter

We all started the same….

Installation equipment

Offshore

oil

and g

as O

ffshore

win

d

1973

~1950

2010

2008

Sheerleg

Jack-u

p

17

Page 18: Offshore: groter, sneller, efficiënter

Developments

�Further offshore

in d

eeper w

ate

rs

�H

eavie

r and larg

er structu

res

�H

igher volu

me in repetitive insta

llation

Requirements

�S

afe

, sound, re

liable

and industria

lised (in

sta

llation) solu

tion

�E

xperienced o

ffshore

(construction) cre

w

�E

quip

ment able

to w

ork

in h

ars

h o

ffshore

conditio

ns

�S

ubsta

ntial cra

ne c

apacity

(outreach a

nd lift capacity)

�E

quip

ment able

to s

tay

offshore

and take c

arg

o b

arg

e a

longsid

e (fe

eder sys

tem

)

�D

edic

ate

d (handlin

g) equip

ment (h

am

mer, lifting tools

, upendin

g tools

, …

)

…and then we m

ove further offshore

Installation requirements

North S

ea o

ffshore

conditio

ns

18

Page 19: Offshore: groter, sneller, efficiënter

Some m

ishaps Oil & Gas

Topsid

e insta

llation w

ith S

heerleg

1966

Jack-u

p p

unch thro

ugh (exam

ple

)

19

2010

Page 20: Offshore: groter, sneller, efficiënter

Some m

ishaps Offshore W

ind

�Various projects

�M

in. 6 m

onth

s d

ela

y due to p

oor w

ork

ability

of in

sta

llation e

quip

ment

�G

rout fa

ilure

(poor desig

n)

�Larg

e v

ariation in p

ile d

rivin

g resis

tance

�Logis

tic p

roble

ms (supply

of m

ate

rial, load o

ut, e

tc)

�…

……

.

20

Page 21: Offshore: groter, sneller, efficiënter

From near-shore to off-shore (in Oil & Gas)

Equipment selection is key

0

20

40

60

80

100

120

140

1950

1960

1970

1980

1990

2000

2011

020

40

60

80

100

120

140

Technology

Let’s c

ontinue in

Offshore

Win

d,

usin

g O

il &

Gas

experience

Distance to shore

21

Page 22: Offshore: groter, sneller, efficiënter

From day-rate to lump-sum contracting in

Oil & Gas

�O

il and g

as s

tarted w

ith d

ay-

rate

contracts

=> m

ore

days

, m

ore

$

�V

essels

chartere

d for series o

f pla

tform

s

�The b

ill w

as p

aid

at th

e e

nd o

f th

e c

ontract by

the O

il C

om

pany

�O

il C

om

panie

s s

oon s

tarted to d

em

and for perform

ance d

riven / lum

p-s

um

contracts

�C

ontracto

rs h

ad to b

e m

ore

innovative to d

eliv

er and e

arn

their m

oney

�U

se w

eath

er sta

tistics for unders

tandin

g e

xposure

�D

evelo

p im

pro

ved insta

llation m

eth

ods a

nd (handlin

g) equip

ment

�D

evelo

p h

ydra

ulic

piling h

am

mers

vers

us s

team

ham

mers

�U

se o

f back-u

p e

quip

ment

22

Page 23: Offshore: groter, sneller, efficiënter

From day-rate to lump-sum contracting in

Offshore wind

�P

roje

cts

will m

eet in

sta

llation s

chedule

/ d

eadlin

es

�R

isks a

re p

ut to

the p

arty

who is a

ble

to m

anage it

�In

sta

llation c

osts

are

know

n u

pfront

�no c

ost overr

uns, no p

re-investm

ents

, no loss o

f pro

ject in

com

e

�In

sta

llation in c

om

plia

nce w

ith H

SE

and M

arine W

arr

anty

Surv

eyo

r

requirem

ents

�C

ontinues innovation / im

pro

vem

ent on insta

llation

�W

ith p

roven c

oncepts

as a

sta

rtin

g p

oin

t

23

Safe

ty &

Schedule

Relia

bili

ty &

Fix

ed

Cost

Gro

ter, S

nelle

r, E

ffic

iente

r

Page 24: Offshore: groter, sneller, efficiënter

Index

1)

Introduction S

HL

2)

Com

parison O

il &

Gas

3)Case study

�Greater Gabbard

�Sheringham Shoal

4)

Jacket in

sta

llation

5)

Turb

ine insta

llation

6)

Substa

tion insta

llation

7)

To c

onclu

de

24

Page 25: Offshore: groter, sneller, efficiënter

Project comparison

25

Projects

Greater Gabbard

Sheringham Shoal

Wate

r depth

m L

AT

22 - 3

214 - 2

4

MP's

by

SHL / T

ota

l#

140 / 1

40

66 / 9

0

TP's

by

SH

L / T

ota

l#

0 / 1

40

71 / 9

0

MP T

op D

iam

ete

rm

5.1

4.7

MP F

oot D

iam

ete

rm

5.5

- 6

.35.2

- 5

.7

MP L

ength

m58 - 6

844 - 6

1

MP P

enetratio

nm

28 - 3

323 - 3

7

TP H

eig

ht

m25

MP W

eig

ht

mt

510 - 6

76

375 - 5

31

TP W

eig

ht

mt

220

Curr

ent (M

ax.

)kn

3.0

2.5

Tid

ual r

ange

m H

AT-L

AT

43

Page 26: Offshore: groter, sneller, efficiënter

Key issues

�Safety and quality -

maxi

mis

ed b

y S

HL’s

adhere

nce to industry

sta

ndard

s

�Project installation schedule -

optim

ised b

y S

HL’s

ow

n insta

llation v

essels

,

equip

ment and s

killed, exp

erienced o

ffshore

cre

w

�Project bankability -

maxi

mis

ed b

y S

HL’s

20 y

ears

offshore

insta

llation

experience a

nd s

trong b

ala

nce s

heet

�Installation budget -transpare

nt due to S

HL’s

Lum

p s

um

insta

llation

contract, inclu

din

g w

eath

er risk

�Interface risk -

min

imis

ed b

y S

HL’s

ext

ensiv

e e

xperience a

s a

n insta

llation

pro

ject m

em

ber

�Foundation and installation solution –

optim

isation e

nsure

d b

y S

HL’s

ow

n

in-h

ouse e

ngin

eering e

xpertis

e

26

Page 27: Offshore: groter, sneller, efficiënter

Greater Gabbard offshore wind farm

�S

econd larg

est offshore

win

d farm

(504 M

W, 140 turb

ines, are

a o

f146 k

m2)

with larg

est fo

undations to d

ate

(up to: W

680 m

T / L

70 m

/ D

6.3

m)

�lo

cate

d in the N

orth S

ea,

25km

off the S

uffolk

coast

�D

evelo

ped b

y S

SE

in a

join

t ventu

re

with R

WE

npow

er re

new

able

s

�Tra

nsport a

nd insta

llation o

f 140 foundations a

nd tw

o s

ubsta

tions;

subcontracte

d b

y Flu

or Lim

ited to S

HL

�In

sta

llation s

plit

over tw

o s

easons d

ue to p

iling restric

tions

27

3.1

Case

stu

dy

–G

reate

r G

abbard

Page 28: Offshore: groter, sneller, efficiënter

Vessel size and sufficient lift capacity improves

safety, efficiency and creates high workability

28

Robust offshore

tra

nsf

er

Ow

n p

iling h

am

mers

Excelle

nt w

ork

ability

Fast & S

afe

handlin

g

3.1

Case

stu

dy

–G

reate

r G

abbard

Page 29: Offshore: groter, sneller, efficiënter

Greater Gabbard -Net duration

Average 16 hours / m

ono pile

Dyneema Fiber Slings

High density PE liner plates

29

3.1

Case

stu

dy

–G

reate

r G

abbard

�P

erform

ance-d

riven c

ontracts

drive innovation, safe

ty a

nd low

er costs

�N

et dura

tion (avera

ge): 1

6 h

ours

/ m

ono p

ile

�A

vera

ge p

ile d

rivin

g: 2.8

hours

�G

ross d

ura

tion (avera

ge): 0

.9 d

ay

(sum

mer)

–2.1

day

(win

ter)

/ m

ono p

ile

Page 30: Offshore: groter, sneller, efficiënter

30

High workability created flexibility and

delivery, 8 weeks ahead of schedule

�A

ll m

ono p

iles insta

lled w

ithin

tole

rances, 8 w

eeks a

head o

f schedule

�39 m

ono p

iles insta

lled in J

uly

; 23 m

ono p

iles insta

lled in J

anuary

(W

inte

r)

�C

ontinued d

uring W

inte

r; p

ossib

le d

ue to h

igh w

ork

ability

�Fix

ed p

rice lum

p-s

um

contract pro

vid

ed fle

xibility

on s

chedule

�B

oth

substa

tions insta

lled in 8

-9 d

ays

(each)

�Topsid

es w

ere

insta

lled fully

com

mis

sio

ned a

nd teste

d

�Tra

ditio

nal substa

tion d

esig

n

(jacket &

topsid

e) in

sta

lled w

ith H

LV

to m

eet pro

ject schedule

and c

reate

flexib

ility

3.1

Case

stu

dy

–G

reate

r G

abbard

Page 31: Offshore: groter, sneller, efficiënter

31

Sheringham Shoal

Challenging installation conditions

�317 M

W (88 turb

ines, A

rea o

f 35 k

m2)

�D

evelo

ped b

y S

cira (Join

t V

entu

re b

etw

een S

tato

il and S

tatk

raft)

�Locate

d in the G

reate

r W

ash, 17 -

23km

off the N

orfolk

coast (1

4 -

24 m

LA

T)

�C

ontract w

ith S

eaw

ay

Heavy

Lifting repla

ces the M

aste

r M

arine a

nd

MTH

øjg

aard

contract re

late

d to the rem

ain

ing s

ubsta

tions a

nd foundation

insta

llation w

ork

�Tra

nsport a

nd insta

llation o

f (r

em

ain

ing)

�66 m

ono p

iles

(up to 5

30m

T / 6

1 x

5.7

m)

�71 tra

nsitio

n p

ieces

(220m

T / 6

1 x

5.0

m)

�tw

o s

ubsta

tions

(each 1

,000 m

T)

3.2

Case

stu

dy

–Sheringham

Shoal

Page 32: Offshore: groter, sneller, efficiënter

Inshore transfer (M

ono Piles)

32

3.2

Case

stu

dy

–Sheringham

Shoal

Page 33: Offshore: groter, sneller, efficiënter

Inshore transfer (Transition Pieces)

33

3.2

Case

stu

dy

–Sheringham

Shoal

Page 34: Offshore: groter, sneller, efficiënter

Deck layout (1)

34

3.2

Case

stu

dy

–Sheringham

Shoal

Page 35: Offshore: groter, sneller, efficiënter

Deck layout (2)

35

3.2

Case

stu

dy

–Sheringham

Shoal

Page 36: Offshore: groter, sneller, efficiënter

Deck layout (3)

36

3.2

Case

stu

dy

–Sheringham

Shoal

Page 37: Offshore: groter, sneller, efficiënter

Deck layout (4)

37

Courtesy

of Sta

toil

3.2

Case

stu

dy

–Sheringham

Shoal

Page 38: Offshore: groter, sneller, efficiënter

38

Pile upending (Lifting tool)

3.2

Case

stu

dy

–Sheringham

Shoal

Page 39: Offshore: groter, sneller, efficiënter

Pile driving

39

3.2

Case

stu

dy

–Sheringham

Shoal

Page 40: Offshore: groter, sneller, efficiënter

Pile verticality m

easurement systems

40

Along pile wall (Mini tilt)

Top of pile

Top of hammer sleeve (Octans)

Side of hammer sleeve (Cilinders)

3.2

Case

stu

dy

–Sheringham

Shoal

Page 41: Offshore: groter, sneller, efficiënter

Transition Piece Installation

41

3.2

Case

stu

dy

–Sheringham

Shoal

Page 42: Offshore: groter, sneller, efficiënter

42

Sheringham Shoal; installation completed

3 weeks ahead of schedule

�M

aid

en p

roje

ct fo

r H

LV

Ole

g S

trashnov

�Tra

nsport o

f fo

undations fro

m F

lushin

g

to o

ffshore

location o

n H

LV

deck

�B

oth

substa

tions topsid

es s

uccessfu

lly

insta

lled in 2

days

(M

ay

2011)

�Foundation insta

llation (M

ono p

ile +

TP

)

(tra

nsport, le

velling, gro

uting inclu

ded)

�M

ay

2011:

15

�June 2

011:

20

�July

2011:

16

�A

ugust 2011:

15 (

finis

hed 2

1-0

8-2

011)

�A

vera

ge

1.7

day

/ fo

undation

Courtesy

of Sta

toil

3.2

Case

stu

dy

–Sheringham

Shoal

Page 43: Offshore: groter, sneller, efficiënter

43

Sheringham Shoal-Net duration

�N

et dura

tion (avera

ge): 1

8 h

ours

/ foundation

�A

vera

ge p

ile d

rivin

g: 2.2

hours

�G

ross d

ura

tion (avera

ge): 1

.7 d

ay

/ fo

undation

3.2

Case

stu

dy

–Sheringham

Shoal

Page 44: Offshore: groter, sneller, efficiënter

Index

1)

Introduction S

HL

2)

Com

parison O

il &

Gas

3)

Case s

tudy

�G

reate

r G

abbard

�S

heringham

Shoal

4)Jacket installation

5)

Turb

ine insta

llation

6)

Substa

tion insta

llation

7)

To c

onclu

de

44

Page 45: Offshore: groter, sneller, efficiënter

Jacket Installation –Noise M

itigation

45

�A

llow

able

subsea n

ois

e levels

160dB

at 750m

dis

tance

�P

ile d

rivin

g h

am

mers

pro

duce >

166dB

at th

is d

ista

nce

�N

ois

e m

itig

ation required.

�A

ir b

ubble

scre

ens

�S

ingle

or double

wall

sile

ncer in

com

bin

ation w

ith a

ir b

ubble

s

Pic

ture

courtesy

of IH

C H

ydro

ham

mer

Page 46: Offshore: groter, sneller, efficiënter

�P

ost piling p

rovid

es c

halle

nges for nois

e m

itig

ation a

nd insta

llation a

ccele

ration

Jacket installation + Post piling

46

Page 47: Offshore: groter, sneller, efficiënter

�U

se a

tem

pla

te, com

bin

ed w

ith a

vib

rato

ry a

nd im

pact ham

mer

Jacket installation + Pre piling

47

Page 48: Offshore: groter, sneller, efficiënter

48

Jacket installation + Pre piling

Tripods and Piles on HLV

Page 49: Offshore: groter, sneller, efficiënter

49

Jacket installation + Pre piling

Use of Silencer Frame

Page 50: Offshore: groter, sneller, efficiënter

50

Jacket installation + Pre piling

Installation of Piles

Page 51: Offshore: groter, sneller, efficiënter

51

Jacket installation + Pre piling

Installation of Piles

Page 52: Offshore: groter, sneller, efficiënter

Jacket installation + Pre piling

Install Tripods onto Piles

52

Page 53: Offshore: groter, sneller, efficiënter

Jacket installation + Pre piling

Deck Layout

53

Page 54: Offshore: groter, sneller, efficiënter

Index

1)

Introduction S

HL

2)

Com

parison O

il &

Gas

3)

Case s

tudy

�G

reate

r G

abbard

�S

heringham

Shoal

4)

Jacket in

sta

llation

5)Turbine installation

6)

Substa

tion insta

llation

7)

To c

onclu

de

54

Page 55: Offshore: groter, sneller, efficiënter

Current way of turbine installation is not

the way forw

ard

55

Page 56: Offshore: groter, sneller, efficiënter

Current way of turbine installation is not

the way forw

ard

56

�C

urr

ently

turb

ines a

re m

ain

ly insta

lled w

ith jack-u

p v

essels

�C

urr

ently

turb

ines a

re m

ain

ly insta

lled o

ffshore

in 5

-6 lifts

�C

urr

ent tu

rbin

e insta

llation d

ura

tions e

xceed 1

week o

r m

ore

�Futu

re p

roje

cts

are

further offshore

in d

eeper w

ate

rs in e

ven m

ore

challe

ngin

g s

oil

and w

eath

er conditio

ns

�Futu

re p

roje

cts

ask for at le

ast 1 turb

ine insta

llation / d

ay

(/pro

ject)

�C

urr

ent in

sta

llation m

eth

od n

eed to c

hange i.e

. to

deal w

ith these

requirem

ents

�In

sta

llation n

eed to b

e inclu

ded in the turb

ine d

esig

n; th

is m

ight re

quire s

light

changes/a

dditio

nal in

sta

llation a

ids

Page 57: Offshore: groter, sneller, efficiënter

Turbine installation

57

Page 58: Offshore: groter, sneller, efficiënter

Turbine installation

58

Page 59: Offshore: groter, sneller, efficiënter

Index

1)

Introduction S

HL

2)

Com

parison O

il &

Gas

3)

Case s

tudy

�G

reate

r G

abbard

�S

heringham

Shoal

4)

Jacket in

sta

llation

5)

Turb

ine insta

llation

6)Substation installation

7)

To c

onclu

de

59

Page 60: Offshore: groter, sneller, efficiënter

Traditional jacket topside design provides

maxim

um flexibility and m

inim

um risks

60

Page 61: Offshore: groter, sneller, efficiënter

Index

1)

Introduction S

HL

2)

Com

parison O

il &

Gas

3)

Case s

tudy

�G

reate

r G

abbard

�S

heringham

Shoal

4)

Jacket in

sta

llation

5)

Turb

ine insta

llation

6)

Substa

tion insta

llation

7)To conclude

61

Page 62: Offshore: groter, sneller, efficiënter

Summary and conclusions

�A

pply

the lessons learn

ed fro

m O

il &

Gas in O

ffshore

Win

d

�E

quip

ment sele

ction is k

ey;

not ju

st sele

ct equip

ment because itis

availa

ble

�W

ork

ability

of m

arine s

pre

ad is a

key

issue in d

evelo

pin

g o

ffshore

win

dfa

rms

�W

ind turb

ine s

hall

be (re

-)desig

ned takin

g into

account offshore

insta

llation

meth

ods

�D

evelo

p innovative (te

chnic

al) s

olu

tions to d

ecre

ase insta

llation tim

e, m

itig

ate

subsea n

ois

e levels

and m

inim

ise (w

eath

er)

dela

ys

62

Fib

er Slin

gs

(Gre

ate

r G

abbard

)

Offshore

Win

d Insta

llation:

“gro

ter, s

nelle

r, e

ffic

iënte

r”…

….a

n industry c

halle

nge !!

Page 63: Offshore: groter, sneller, efficiënter

63

Thank you for your attention!

Page 64: Offshore: groter, sneller, efficiënter

28/1

1/2

011

64

Page 65: Offshore: groter, sneller, efficiënter

65

Offshore: groter, sneller,

efficiënter

10 november 2011

‘s-Hertogenbosch