"DIFIS"
Double Inverted Funnel for the
Intervention
te e t o o
on S
Ship
p wrecks
ec s
Hans Cozijn
S i P
Senior
Project
j tM
Manager Off
Offshore
h
Presentation Outline
–
–
–
–
–
DIFIS concept
Project organisation
DIFIS design
S t
System
deployment
d l
t
Model tests carried out by MARIN
–
–
–
–
Operational / Survival Conditions
Offloading Conditions
Deployment Tests
P j t follow-up
Project
f ll
2
Presentation Outline
–
–
–
–
–
DIFIS concept
Project organisation
DIFIS design
S t
System
deployment
d l
t
Model tests carried out by MARIN
–
–
–
–
Operational / Survival Conditions
Offloading Conditions
Deployment Tests
P j t follow-up
Project
f ll
3
DIFIS Concept
4
DIFIS Concept
–
–
–
–
"Dome"
cover the ship wreck
wreck,
collect leaking oil
"Riser Tube"
guide oil towards surface
"Buffer Bell"
p
y storage,
g , buoyancy
y
y
temporary
Shuttle Tanker
transport oil to shore
5
DIFIS Concept
–
Advantages
–
–
–
–
–
Passive system
Relatively quick to deploy
S it bl ffor llarge water
Suitable
t d
depths
th
Cheaper and more effective than existing solutions
Limitations
–
–
–
O y for
Only
o oil
o lighter
g te tthan
a water
ate
Maximum diameter Dome +/-100 m
Practical limitations in system deployment
6
Presentation Outline
–
–
–
–
–
DIFIS concept
Project organisation
DIFIS design
S t
System
deployment
d l
t
Model tests carried out by MARIN
–
–
–
–
Operational / Survival Conditions
Offloading Conditions
Deployment Tests
P j t follow-up
Project
f ll
7
EU project in '6th Framework Programme'
–
–
–
–
–
MARIN project coordinator
8 partners
Total budget
g 3.2 M€
EC funding 1.8 M€
Duration 45 months
(September 2005 - May 2009)
8
Project Partners
DIFIS
Consortium
Members
9
Presentation Outline
–
–
–
–
–
DIFIS concept
Project organisation
DIFIS design
S t
System
deployment
d l
t
Model tests carried out by MARIN
–
–
–
–
Operational / Survival Conditions
Offloading Conditions
Deployment Tests
P j t follow-up
Project
f ll
10
DIFIS design
–
–
–
–
Design made by SENER (Spain)
Preliminary design
Model tests / simulations
Final design
–
–
–
Dome
Riser Tube
Buffer Bell
11
DIFIS design - Dome
–
–
–
–
–
–
H = 52.5 m
Ddome = 105 m
Danchors = 185 m
Synthetic fabric
Dyneema lines
Dome model at
1:10 was made
12
DIFIS design - Dome Interface
–
–
–
–
Height ~ 4 m
Diameter 4 - 10 m
Weight
g ~ 70 t
Connection between
Dome (fabric) and
Riser Tube (PE pipe,
Dyneema line)
13
DIFIS design - Riser Tube
–
–
–
–
–
–
PE pipe
D=2m
Section length 50 m
Steel connectors
Dyneema line (6)
Total length depends on water depth
14
DIFIS design - Buffer Bell
–
–
–
–
–
Height 23 m
Diameter 21 m
Capacity
p
y 6,250
,
m3
Steel "ring"
Synthetic fabric cover
15
Presentation Outline
–
–
–
–
–
DIFIS concept
Project organisation
DIFIS design
S t
System
deployment
d l
t
Model tests carried out by MARIN
–
–
–
–
Operational / Survival Conditions
Offloading Conditions
Deployment Tests
P j t follow-up
Project
f ll
16
DIFIS Deployment Step-by-Step
1.
2.
3.
4.
5.
6.
7.
Site survey
Place anchor blocks
Launch Dome
Construction and lowering of the Riser Tube
Unfold Dome
Connection of the Buffer Bell
Periodic inspections
17
Construction Riser Tube / Unfolding Dome
DIFIS_Deployment.avi
18
Deployment - Unfolding Dome
19
Deployment - Unfolding Dome
20
Presentation Outline
–
–
–
–
–
DIFIS concept
Project organisation
DIFIS design
S t
System
deployment
d l
t
Model tests carried out by MARIN
–
–
–
–
Operational / Survival Conditions
Offloading Conditions
Deployment Tests
P j t follow-up
Project
f ll
21
Task 6.2 - Hydrodynamic Model Tests (MARIN)
–
–
MARIN's Offshore Basin
Objectives
–
–
–
–
–
Test Series 1 - Operational, Survival, Offloading
–
–
Feasibility DIFIS concept
Design data
Validation of computer simulations
Promotion materials (photos / video)
March 2007
Test Series 2 - Deployment Tests
–
January 2008
22
MARIN's Offshore Basin - Cross Section
23
MARIN's Offshore Basin - Top View
wave absorbing beaches
44.35 m
current (180 deg)
35.6 m
waves
(180 - 270 deg)
wind
(170 - 280 deg)
wave generators
6 current pumps and recirculation ducts
24
Models - Scale 1:60
–
–
–
–
–
–
–
–
Ship Wreck
Dome + Dome Housing
Mooring Lines + Anchor Points
Riser Tube
Buffer Bell
DP Shuttle Tanker + Offloading Hose
Installation Vessel
Lifting
g Bags
g + Automatic Release
25
Dome with Mooring Lines and Tanker Wreck
26
Detail of Dome Mooring Lines
27
Detail Anchor Point
28
Riser Tube
29
DP Shuttle Tanker (1)
30
DP Shuttle Tanker (2)
31
Installation Vessel
Dimensions (1:60)
Lpp = 208.56
208 56 m
B = 38.64 m
T = 9.60 m
32
Test Scope (1)
–
Operational / Survival Tests
–
–
–
–
–
–
Currentt O
C
Only
l conditions
diti
(4)
Operational environments (4)
S i l environments
Survival
i
t (4)
Buffer Bell (1,000 / 2,000 t)
Total 24 tests
3 extra current only tests
(1,000 t Buffer Bell only)
Swell
Buffer Bell
Vertical
Current
Profile
Riser Tube
Dome
Mooring lines
33
DIFIS System in Operation
Test Set-up in MARIN's Offshore Basin
Maximum water depth 10.2 m (612 m)
34
Buffer Bell model in Test Set-up
35
Video Test Set-up Offshore Basin
36
Test Results - DIFIS in current only conditions
10
0
UR ~ 20
Current 180.0
Current 180.0
o
o
20
10
-10
0
-20
X displacement [Earth-fixed]] in m
X displacement [Earth-fixed]] iin m
(1,000 t)
-30
-40
-10
-20
-30
UR ~ 12
-50
-40
-60
-50
(2,000 t)
-70
-60
30
20
10
0
-10
Y displacement [Earth-fixed] in m
-20
-30
30
20
10
0
-10
Y displacement [Earth-fixed] in m
-20
-30
37
Test Results - VIV behaviour Buffer Bell
Buffer Bell VIV
0.9
Pretension 1,000 t - Current Only
0.8
Pretension 2,000 t - Current Only
0.7
Sway A/D [-]
0.6
0.5
0.4
0.3
0.2
0.1
00
0.0
0.0
5.0
10.0
15.0
20.0
25.0
Ur [-]
=Tests
T t in
i Current
C
t (no
( waves)) =
38
0
0
-15
-15
-30
-30
-45
-45
Z displacement [Earth-fix
fixed] in m
Z displacement [Earth-fix
fixed] in m
Test Results - DIFIS in waves and current
-60
-60
-75
-75
-90
-90
-105
-105
-120
-120
30
15
0
-15
-30
X displacement [Earth-fixed] in m
-45
-60
Test No. 905002 - Survival 3 Conditions (1,000 t)
30
15
0
-15
-30
X displacement [Earth-fixed] in m
-45
-60
Test No. 907008 - Operational 1 Conditions (2,000 t)
= Example Side-view XZ Contour Plots =
39
Test Results - Operational / Survival Tests
–
Time Records / Statistics
–
–
–
–
–
–
Buffer
B
ff bell
b ll motions
i
Tensions in Riser Tube
Tensions in Mooring Lines
Contour plots
p
Motion RAOs
Photo / video recordings
40
Conclusions - Operational / Survival Tests
–
–
–
–
–
–
Overall behaviour of DIFIS system meets expectations;
=conceptt appears to
t be
b feasible=
f
ibl
No unexpected or instable behaviour observed
Dome shape remains intact in current
Limited Buffer Bell motions
Variations in Dome mooring line loads (in waves)
need
d tto be
b addressed
dd
d iin th
the fi
finall d
design
i
Extrapolation of test results to 4,000 m water depth
41
Wind
Test Scope (2)
–
Offloading Tests
–
–
–
–
Operational
O
ti
l environments
i
t (4)
Buffer Bell (1,000 t)
Sh ttl Ballast
Shuttle
B ll t / Loaded
L d d
Total 8 tests
Shuttle Tanker
Swell and Local waves
Buffer Bell
Export Riser
Vertical
Current
Profile
Riser Tube
Dome
Mooring lines
42
Offloading Test in the Offshore Basin
43
Test Results - Offloading Tests
Test No. 809005
Operational 3 Conditions
Loaded Shuttle Tanker
Buffer
ff Bell 1,000 t
= Example Top-view XY Contour Plots =
44
Conclusions - Offloading Tests
–
–
Overall behaviour of DIFIS system meets expectations;
=offloading
ffl di operation
ti iis ffeasible=
ibl
Presence of DP Shuttle Tanker during offloading
does not affect the Buffer Bell / Riser Tube
45
Winch
Test Scope (3)
–
Swell and Local waves
Installation Tests
–
–
–
–
–
–
4 operational
ti
l environments
i
t
3 stages of lowering
2 diff
differentt pretensions
t
i
16 stationary tests
1 additional test survival test
6 dynamic tests
Installation Vessel
Riser Tube
Dome
1
Mooring lines
(Installation wires)
Vertical
Current
Profile
2
3
46
Test Set-up Offshore Basin
D l
Deployment
tT
Tests
t (mid
( id water)
t )
–
–
Operational Conditions
Dome (folded)
at +/- half the water depth
Stationary Tests
47
Test Set-up Offshore Basin
Deployment Tests (unfolding)
–
–
–
Still water conditions
+ tests in current
Intact / Damaged cases
Unfold Dome
right above the wreck
Dynamic Tests
48
Set-up Deployment Tests
Dome
Housing
Installation
Wires
Folded
F
ld d
Dome
Lifting Bags
49
Test Results - Deployment Tests (dynamic)
50
Conclusions - Deployment Tests
–
–
–
–
–
Overall behaviour of DIFIS system meets expectations;
=investigated
i
ti t d stages
t
off deployment
d l
t are feasible=
f
ibl
No unexpected or instable behaviour observed
(stationary tests)
Dome
o eu
unfolds
o ds correctly
co ect y in st
still water
ate a
and
d in cu
current
e t
(dynamic tests)
Variations in Installation Wire tensions limited
Extrapolation of test results to 4,000 m water depth
51
Presentation Outline
–
–
–
–
–
DIFIS concept
Project organisation
DIFIS design
S t
System
deployment
d l
t
Model tests carried out by MARIN
–
–
–
–
Operational / Survival Conditions
Offloading Conditions
Deployment Tests
P j t follow-up
Project
f ll
52
DIFIS II project
–
Ideas for follow-up project
–
–
–
–
Further
F
th development
d
l
t off deployment
d l
t procedure
d
Finalisation of detailed design
I t ll ti off a DIFIS proto-type
Installation
t t
Challenges
–
–
–
–
Suitable location for proto-type
Budget
Regulations
Industry participation
53
Thank you !
Questions ??
Hans Cozijn
[email protected]
+31 317 493 272
http://www.difis.eu/
http://www marin nl/web/JIPs-Networks/Public/DIFIS
http://www.marin.nl/web/JIPs
Networks/Public/DIFIS.htm
htm
54