E x p e c t M o o r f r o m a L e a d e r .

Suction Pile & Manifold InstallationAC 24

Suction Pile & Manifold InstallationAC 24

OverviewOverview

• Field Architecture• Mobilization• Installation• Lessons Learned

Field LocationField Location

• Alaminos Canyon Block 24– 160 miles south of Galveston– 120 miles offshore– 4851 ft WD

Field ArchitectureField Architecture

• 2 existing subsea wells– A 4,356 ft WD– B 4,851 ft WD

• Spar– 18’ gas & oil export lines

Mobilization 3/11-3/12Mobilization 3/11-3/12

InterMoor Fourchon Dock• 2 CASIM units (50t capacity)• Offshore basket

– 7 ROV Shackles• 2 x 85t• 3 x 55t• 2 x 35t

– 11 Green Pin Shackles (85t)– 2 ROV Hooks (100t)– 1 Miller Swivel (75t)

• Compressed Nitrogen Bottles and rack• Offshore toolbox

– Compressed gas booster pump– Soft slings– Misc other tools and hardware (chain for sea fastening)

Mobilization 3/12Mobilization 3/12

InterMoor Fourchon Dock• 35’ suction pile

– Steel chocks– Chain

• Subsea Manifold– Stands

Mobilization 3/12Mobilization 3/12

• Video link here• Video link here• Weight of Suction Pile ~ 36 tons• 13.5’ diameter• 35’ pile, 42’ overall length

Transit 3/12-3/14Transit 3/12-3/14

3/12 2300—Depart InterMoor Dock3/13 1515—Stop in Vermillion 395-ROV Trial3/13 1600—Underway3/14 0815—Arrive on location AC24

Installation – Survey 3/14-3/15Installation – Survey 3/14-3/15

3/14/09 – 1005 Load Subsea Basket (SSB)– 1301 SSB in water– 1440 Basket touchdown at seabed– 1530 Buckets placed– 1600 Boxing in beacons & PLEMs

3/15/09 – 0800 Finished box in

Installation – Suction Pile 3/15-3/16Installation – Suction Pile 3/15-3/16

3/15/09 – 1000 Adjust CASIM Pressures

• 2315psi top, 2165 bottom– 1239 CASIM rigging underway– 1510 Suction pile overboarded– 1600 Pre-lift safety meeting and JSA– 1804 Pile vertical– 2048 Transfer to tower crane complete– 2230 Suction pile at 100’ above seabed– 2351 Touchdown on seabed <1° from vert

3/16/09 – 0012 Self weight penetration 24.5’– 0200 Vacuum pumped to 32.5’ penetration – 0238 Suction pile disconnected from rigging– 0710 Rigging recovered on deck

Installation – Suction Pile photosInstallation – Suction Pile photos

Pressure adjustment

Deck layout pre-deployment

Moving CASIM for rigging

Overboarding

Installation – Deploying CASIMInstallation – Deploying CASIM

• Video link here and here• Weight of assembly – 7 tons• Length of assembly ~ 60’ (fully extended)

Installation – Suction Pile photosInstallation – Suction Pile photos

Pile 248’ below waterline Pile 239’ below waterline

Top of pile 70’ above seabedRighting pile at 250’ WD

Installation – Suction Pile photosInstallation – Suction Pile photos

Zeroing in on target-3’ to goZeroing in on target-6’ to go

Zeroing in on target-inches left TOUCHDOWN

Installation – Suction Pile as builtInstallation – Suction Pile as built

Target Location

Actual Location

Installation – Manifold 3/16Installation – Manifold 3/16

3/16/09– 0738 CASIM lowered on deck– 0740 Adjust CASIMs pressure

• 2165-1114 psi lower and 2351-1265 psi upper– 1000 Pre-lift safety meeting and JSA– 1334.40 Lift manifold– 1335 Manifold in water, lower to 250’ WD for transfer– 1450 Lowering to 100’ above seabed– 1549 Moving vessel to suction pile location– 1656 Manifold landed on Suction Pile

Installation – Manifold transferInstallation – Manifold transfer

• Video link here• Weight of Manifold 11 tons• Dimensions ~ 10’ x 10’ x 15’

Installation – Manifold PhotosInstallation – Manifold Photos

Attaching Rigging

Swapping lifting bridle Rigging Manifold

Installation – Manifold transferInstallation – Manifold transfer

Manifold subsea—241’ Lowering CASIM from Tower

Grabbing rigging; transfer to tower Removing sling from ROV hook

Installation – Manifold transferInstallation – Manifold transfer

Transferring load from crane to tower Freeing ROV hook—take 1

Freeing ROV hook—take 2 Manifold prior to lowering

Installation – Landing ManifoldInstallation – Landing Manifold

Lowering on suction pile—3’ to goLowering manifold—274’ to go

Lowering suction pile—1’ to go TOUCHDOWN

Installation – Manifold disconnectInstallation – Manifold disconnect

Inclination check--<1° off vertical Locking down

Removing ROV Shackle pins Lifting Rigging

Lessons LearnedLessons Learned

• Clear communication is the key to success• When transferring load from one crane to

another, add a few extra feet to the sling• Slow steady crane movements• Plan for the unexpected• Practice preparing and conducting a JSA• Measure twice cut once—Manifold slings• Bleeding pressure for CASIMs happens at about

38psi/min

E x p e c t M o r e . . . G e t M o o r .

Project TeamProject Team

Oil Company E• Project Manager• Subsea Systems Engineer

InterMoor• Offshore Project Manager• Offshore Construction Manager

DMT Emerald• Ship’s Captains• Vessel Superintendant

UTec• Project Chief• Surveying Engineer

Huisman/Intrepid• Project Manager

• Independent Consultant Subsea Systems• Safety Superintendant

• Field Engineer• Field Engineer

• Deck Foreman• Crew

• Surveying Engineer