Installation of Subsea Processing System in Deepwater - Subsea UK
Installation of Subsea Processing System in Deepwater - Subsea UK
Installation of Subsea Processing System in Deepwater - Subsea UK
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<strong>Installation</strong> <strong>of</strong> <strong>Subsea</strong> <strong>Process<strong>in</strong>g</strong> <strong>System</strong><br />
<strong>in</strong> <strong>Deepwater</strong><br />
5 th June 2013<br />
Mar<strong>in</strong> Abélanet
Agenda<br />
Pazflor Project Overview<br />
<strong>Subsea</strong> Separation Unit<br />
Information<br />
Challenges and Outcomes:<br />
1. IMF and SM Seafasten<strong>in</strong>g and<br />
Transportation<br />
2. Limit<strong>in</strong>g Sea States for SSU<br />
Deployment<br />
3. Structure <strong>Installation</strong><br />
4. SSU Tie-In<br />
Conclusions<br />
10-Jun-<br />
13<br />
Page 2
Pazflor Project Overview<br />
3 x <strong>Subsea</strong> Separation Units<br />
10-Jun-<br />
13<br />
Page 3
Pazflor Project Overview<br />
• Client:<br />
Total<br />
• Contractor:<br />
<strong>Subsea</strong> 7 - Technip<br />
Consortium<br />
• Contract:<br />
• Scope:<br />
EPIC<br />
– <strong>Installation</strong> <strong>of</strong> 3 SSUs - the<br />
first ever to be deployed <strong>in</strong><br />
deepwater fields<br />
– 54km <strong>of</strong> rigid pipel<strong>in</strong>es<br />
– 10 flowl<strong>in</strong>e piles<br />
– 18 rigid jumpers<br />
– 87km <strong>of</strong> dynamic and static<br />
umbilicals<br />
– Three manifolds<br />
– 16 FPSO moor<strong>in</strong>g l<strong>in</strong>es and<br />
piles<br />
– Two flexible dynamic risers<br />
10-Jun-<br />
13<br />
Page 4
Agenda<br />
Pazflor Project Overview<br />
<strong>Subsea</strong> Separation Unit<br />
Information<br />
Challenges and Outcomes:<br />
1. IMF and SM Seafasten<strong>in</strong>g and<br />
Transportation<br />
2. Limit<strong>in</strong>g Sea States for SSU<br />
Deployment<br />
3. Structure <strong>Installation</strong><br />
4. SSU Tie-In<br />
Conclusions<br />
10-Jun-<br />
13<br />
Page 5
<strong>Subsea</strong> Separation Unit Information<br />
1 2 3<br />
No Description Envelope Dimensions In Air Weight<br />
1 FBS 15m x 15m x 14m 205 Te<br />
2 IMF 20m x 20m x 8m 264 Te<br />
3 Separator Module (SM) 6m x 6m x 20m 440 Te<br />
10-Jun-<br />
13<br />
Page 6
Agenda<br />
Pazflor Project Overview<br />
<strong>Subsea</strong> Separation Unit<br />
Information<br />
Challenges and Outcomes:<br />
1. IMF and SM Seafasten<strong>in</strong>g and<br />
Transportation<br />
2. Limit<strong>in</strong>g Sea States for SSU<br />
Deployment<br />
3. Structure <strong>Installation</strong><br />
4. SSU Tie-In<br />
Conclusions<br />
10-Jun-<br />
13<br />
Page 7
IMF and SM Seafasten<strong>in</strong>g and Transportation<br />
• Grillage for structures sensitive to fatigue<br />
• Grillage design for guid<strong>in</strong>g for deployment & recovery <strong>of</strong>fshore<br />
• Grillage design for 2 journeys<br />
– Norway to Angola on a heavy lift vessel across Bay <strong>of</strong> Biscay <strong>in</strong> November<br />
– Luanda to field on a cargo barge<br />
• Grillage design to enable lift with IMF/SM for<br />
– Load-out on heavy lift vessel<br />
– Transfer onto cargo barge <strong>in</strong> Luanda bay<br />
– Grillage clamped on each structure (no weld)<br />
– Additional stoppers for sea-fasten<strong>in</strong>g <strong>of</strong> SM/IMF on grillage<br />
• Protrud<strong>in</strong>g and sensitive equipment<br />
– SM land<strong>in</strong>g area on the IMF<br />
– Hubs for future connections<br />
– Pip<strong>in</strong>g and valves<br />
10-Jun-<br />
13<br />
Page 8
IMF and SM Seafasten<strong>in</strong>g and Transportation<br />
10-Jun-<br />
13<br />
Page 9
IMF and SM Seafasten<strong>in</strong>g and Transportation<br />
10-Jun-<br />
13<br />
Page 10
IMF and SM Seafasten<strong>in</strong>g and Transportation<br />
Structure Delivery <strong>in</strong> Luanda:<br />
10-Jun-<br />
13<br />
Page 11
Structure Lift<strong>in</strong>g and <strong>Installation</strong><br />
Structure Lift Rigg<strong>in</strong>g:<br />
• Very strict tolerance on structure <strong>in</strong>cl<strong>in</strong>ation<br />
– (+/- 0.5 degree)<br />
• Uncerta<strong>in</strong>ties with structure weight and CoG<br />
– Estimated submerged weight<br />
– Estimated preservation fluids<br />
– Entrapped water<br />
• Adjustment <strong>of</strong> Rigg<strong>in</strong>g Lengths<br />
– Schedule constra<strong>in</strong>t<br />
10-Jun-<br />
13<br />
Page 12
SSU Tie-In<br />
Hurdle Challenge Mitigation<br />
1<br />
2<br />
3<br />
4<br />
Strok<strong>in</strong>g <strong>of</strong> such a large and heavy object<br />
• 300Te <strong>of</strong> downward force from the Separator<br />
Unit, 800mm strok<strong>in</strong>g<br />
• Very high centre <strong>of</strong> gravity, result<strong>in</strong>g <strong>in</strong><br />
eccentricity from the strok<strong>in</strong>g location<br />
Hub preparation prior to strok<strong>in</strong>g<br />
• Extremely tight ROV work<strong>in</strong>g area<br />
• Impact <strong>of</strong> dropped objects<br />
Hub alignment and tie-<strong>in</strong><br />
• Alignment <strong>of</strong> 3 hubs <strong>in</strong> a s<strong>in</strong>gle strok<strong>in</strong>g<br />
operation<br />
• Double CAT tie-<strong>in</strong> and several fly<strong>in</strong>g leads<br />
Interfac<strong>in</strong>g with Company, SPS Contractor and<br />
<strong>Installation</strong> Contractor<br />
SIT’s, SIT’s, and then more SIT’s<br />
• Use <strong>of</strong> 2 x strok<strong>in</strong>g cycl<strong>in</strong>ders became<br />
the base case after onshore trials<br />
• 3D ROV access simulation<br />
• Dry and wet trials with mock ROV<br />
• Good design, which was significantly<br />
challenged prior to gett<strong>in</strong>g to the test<strong>in</strong>g<br />
phase<br />
• Checked dur<strong>in</strong>g SIT<br />
The Client’s strong will<br />
10-Jun-<br />
13<br />
Page 13
SSU Tie-In - Strok<strong>in</strong>g<br />
Before<br />
After<br />
800mm<br />
The vertical separator<br />
weight is 300Te<br />
181kg<br />
Strok<strong>in</strong>g<br />
Tool<br />
10-Jun-<br />
13<br />
Page 14
SSU Tie-In – Hub Preparation<br />
102 Kg<br />
Max<br />
274 Kg<br />
10-Jun-<br />
13<br />
Page 15<br />
Dropped objects would prevent<br />
structure strok<strong>in</strong>g, with no real proven<br />
cont<strong>in</strong>gency for retriev<strong>in</strong>g them
Agenda<br />
Pazflor Project Overview<br />
<strong>Subsea</strong> Separation Unit<br />
Information<br />
Challenges and Outcomes:<br />
1. IMF and SM Seafasten<strong>in</strong>g and<br />
Transportation<br />
2. Limit<strong>in</strong>g Sea States for SSU<br />
Deployment<br />
3. Structure <strong>Installation</strong><br />
4. SSU Tie-In<br />
Conclusions<br />
10-Jun-<br />
13<br />
Page 16
Conclusions<br />
1. What can be achieved <strong>in</strong> our projects is impressive<br />
2. Interfaces are the key<br />
3. Early <strong>Installation</strong> Contractor Involvement<br />
4. Company Involvement and Follow-Up<br />
10-Jun-<br />
13<br />
Page 17
seabed-to-surface<br />
www.subsea7.com<br />
10.01.11 Page 18
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