Perdido Spar Installation.pdf

DOT presentation03 Oct 2008

Perdido Installation program- Transport & Installation -

Perdido Project

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AGENDA

IntroductionPerdido field specificsResourcesProgram / scheduleExecution

- Mooring pile installation- Flowline installation- Hull transportation & Installation- SCR installation.

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Perdido Subsea Project overview

Perdido site

Alaminos Canyon, block 857

Company / Operator: Shell Exploration & ProductionPartners: BP/ Chevron

Location:Alaminos Canyon block 857Water depth: ~7,850 - 9,800 feet Truss Spar Subsea development

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Far away offshore

Corpus Christi – 150 milesGalveston – 180 miles

Approx. 1.5 - 2 hours by helicopterNearest platform – 80 miles

Perdido site


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Perdido field detailsWater Depths:

• N mooring cluster 2,460 m

• DVA site 2,380 m

• Tobago 2,950 m ! RECORD

• SE mooring cluster 2,630 m ! RECORD

• SW mooring cluster 2,330 m

DVA = Direct Vertical Access

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Perdido Records

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SPAR waterdepth development

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• Mooring piles• SPAR• Topsides• Production Flowlines• Water Injection system• Export Steel Catenary Risers• Manifold piles & manifolds• Electrical SubmersiblePump (ESP) caissons &inlet assemblies

Heerema Scope

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The offshore program

Jun Jul Aug Sep Oct

2008

1 Perdido Mooring piles

2 Perdido Flowlines

3 Perdido HOST hook-on

4 Perdido SCR’s

5 Perdido topsides (2009)

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The resources

DCV Balder

SSCV Thialf

Support vessel Union Manta

Transport Barges etc.

400 ft.

300 ft.

250 ft.

Spar tugs

Fixed ballast

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The people

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Geneva

Delft, Zwijndrecht, Vlissingen, Leiden.

Houston

Lagos

Perth

Heerema Group Worldwide

Hartepool, Surrey

Mexico City, Villahermosa

Luanda

Heerema Group - worldwide

Bangalore

• subsea

• Moorings / hull• subsea

analysis support

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Balder Work Area split

• Dedicated pipelay

• Storage

• Material handling

• Dedicated mooring

Accommodation for 350 persons

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Upgrades for the deep

Greater waterdepth than before. Equipment upgrades required:A&R wire 4,000 m, 5.5 inch diameterL&P wire 4,000 m, 4.5 inch diameterCrane wires 2 * 19km, tuned constructionPositioning equipment more sensitive equipmentROV frame & winch capacity.

Type 8023Type 8023More DirectionalMore Directional

beam shape beam shape below transceiver facebelow transceiver face

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9 leg taut mooring system in three clusters

Perdido Regional Host Installation- Spar mooring configuration

Lines 1, 2, 4, 5, 7 & 8 Lines 3, 6 & 9

Platform chain:Max. 345m of 135mm studless chainPolyester rope: 229mm diameter1830m + 1830m + 37m insertGround chain:54m of 135mm studless chain

Platform chain:Max. 345m of 135mm studless chainPolyester rope: 229mm diameter1220m + 1220m + 137m insertGround chain:67m of 135mm studless chain

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The 9 piles are transported on 2 barges each 260ft long

Phase 1 - Pile installation

Mooring Pile components:Suction piles: 5.5m dia. – 31m long, 250 tons

Pile shackle Between pile and pile chainPile chain: 75’ of 5.3” (134mm) studless chainMooring connector: BSW Ballgrab female connector + shackle

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Transfer from barge to Balder deck


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Pile and mooring component assembly on Balder deck


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Phase 1 - Pile installationUpend pile above deck using two cranes

Slew overboard and lower

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Lower pile to seabedPositionApply suction with pump mounted on ROV

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Phase 2 - Flowline phase work

Production flowlines2 no.’s 8.625” OD * 18.1 mm 3 no.’s 10.75” OD * 22.2 mmcoated with Glass sphere polyurethane (GSPU)

Water Injection flowline1 no.’s 10.75” OD * 22.2 mmOutside & inside coated with fusion bonded epoxy (FBE)

All with Pipeline end terminations (PLET’s) on both ends

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PLET transfer


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Start-up PLET upending


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Pipe layOn deck: 2 double Joints + 1 collar Joint = 1 Hex Joint

Hex Joints in tower

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End PLET in tower


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Phase 3a - Mooring line pre-deployment

The mooring components are transported on 2 barges, 300ft & 400ft long

3 Mooring line pre-deployed :Hurricane contingencyDecrease of critical spar exposure timeLearning curve for assembling components

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The mooring components are transferred to Balder deck for assembly

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The polyester ropes are spooled from their transport reel on to Balder’s Mooring Line Deployment Winch


Assemble mooring components on Balder deck

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Connect ground chain to bottom polyester Overboard connection

Hang-off bottom polyester rope Spool on next polyester rope

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Assemble mooring components on Balder deck

Connect bottom polyester rope with top rope…

Overboard connection and spool off top polyester rope

Connect & overboard buoy

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Inshore tow-out route

Phase 3b - Wet tow & Spar upending

Perdido site


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Connect ballast hoses to spar

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Prepare Layout top of Spar

Install pull-in equipment

Make safe

Phase 3c - Mooring line hook-up

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Hand over polyester to tug to keep polyester off seabedSpool off top segment of poly rope


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Install and deploy platform and messenger chainTug holds Poly wire from seabed


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Lower chain clamp to transfer the load to the sparDisconnect using ROV


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Slurry suspension to be pumped to soft tank

Phase 3d - Fixed ballast installation

Fixed ballast material: magnetite (iron ore), 13,533 mtontransported with hopper barge Peggy Palmer and push boat Naida Ramil, moored along Balder

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Install piping on Balder deckInstall ballast boom


Install piping on spar deck

Connect piping to the soft tank filling points on top of spar

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Mix magnetite with seawater using front loaders and water from BalderPump slurry into spar


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Haul in 3 * 750’

(440 links)

Step 2

Pay out 2 * 750’(440 links)

Cluster 1 tension at stoppers ~1260 kips

Further increase tension of line 1 (~1860 kips). This will be above stall capacity (=1600 kips)

Step 1

Phase 3e – Mooring line stretching

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Phase 4 SCR installation

Pick-up pre-laid pipe

Install final VIV strakes

flex joint welded

1 no.’s of 10.75” OD * 22.2 mm WT Water Injection SCR (ID coated)2 no.’s of 16” OD * 25.4 mm WT export SCR

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Transfer headFlexjoint

3½″ SCR pull-in wire pre-installed on spar.

Socket


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QUESTIONS ?

Perdido Spar Installation.pdf

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