ANCLAJE SEPLA

8/6/2019 ANCLAJE SEPLA

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TECHNOLOGY OFECHNOLOGY OFSEPLA ANCHORSEPLA ANCHORS

Gengshen LiuGengshen Liu(October 27, 2004)(October 27, 2004)


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SEPLA ANCHORSSEPLA ANCHORS

Sketch of the Mooring Line Configuration


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Installationof SEPLA


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SEPLAANCHOR,CONNECTORand

FOLLOWER


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SEPLA TIMELINESEPLA TIMELINE

19971997 -- Patent Application FiledPatent Application Filed

19981998 -- Follower Design Developed, Model and FieldFollower Design Developed, Model and FieldTests, First Commercial SEPLA Installed (forTests, First Commercial SEPLA Installed (forSupply Boat Mooring)Supply Boat Mooring) (400 ft WD),(400 ft WD),Polyester/SEPLA JIP for Ocean AmericaPolyester/SEPLA JIP for Ocean America

(4,400 ft WD)(4,400 ft WD)

19991999 -- Polyester/SEPLA JIP for Ocean VictoryPolyester/SEPLA JIP for Ocean Victory

(4,500 ft WD), U.S. Patent Granted(4,500 ft WD), U.S. Patent Granted

20002000 -- 2 SEPLA Taut Legs installed for Homer2 SEPLA Taut Legs installed for HomerFerringtonFerrington (4,600 ft WD)(4,600 ft WD)

20012001 -- 1/5th scale land test program, installed 81/5th scale land test program, installed 8SEPLAs for Ocean Confidence (6,400 ft WD), 4SEPLAs for Ocean Confidence (6,400 ft WD), 4

SEPLAs for Deepwater Horizon (2,200 ft WD)SEPLAs for Deepwater Horizon (2,200 ft WD) 20032003 Delivered and Installed 19 SEPLAs to EssoDelivered and Installed 19 SEPLAs to Esso

Angola for Kizomba A and XikombaAngola for Kizomba A and XikombaDevelopment Drilling ProgramDevelopment Drilling Program

20042004 Continue Testing in SEPLA JIP*, Esso OrderedContinue Testing in SEPLA JIP*, Esso Ordered3 Additional SEPLAs for Kizomba B, Murphy3 Additional SEPLAs for Kizomba B, MurphyAccepts SEPLA as a Permanent MooringAccepts SEPLA as a Permanent MooringAnchor forAnchor forKikehKikeh ProposalProposal

* JIP investigate long-term behavior of plate anchors


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SEPLA INSTALLATION SEQUENCESEPLA INSTALLATION SEQUENCE

1 3

2 4


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SEPLA INSTALLATION SEQUENCESEPLA INSTALLATION SEQUENCE

Lowering Down the SPELA with

the Follower

Retrieve the Follower


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SEPLA INSTALLATIONSEPLA INSTALLATION


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CONNECTOR STABCONNECTOR STAB--ININ


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Subsea mating

CLIP20

MOV39

Inspection fly-by

SEPLA Subsea ConnectorSEPLA Subsea Connector


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BALLGRAB ANCHOR CONNECTORSBALLGRAB ANCHOR CONNECTORS

Utilizes Ball and TaperUtilizes Ball and TaperTechnologyTechnology

Top Entry ConnectorTop Entry Connector

Engages with No ROVEngages with No ROV

Intervention (Viewing Only)Intervention (Viewing Only) Not Adversely Impacted By HeaveNot Adversely Impacted By Heave

Allows OneAllows One--Vessel InstallationVessel Installation

Allows Installing Anchors inAllows Installing Anchors in

Advance of Mooring LineAdvance of Mooring Line

Allows Leaving Anchor BehindAllows Leaving Anchor Behindfor Later Usefor Later Use

Allows Changing Out MooringAllows Changing Out MooringLine While Leaving Anchor IntactLine While Leaving Anchor Intact


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SEPLA RETRIEVESEPLA RETRIEVE


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LOADING SEPLA WITH ALOADING SEPLA WITH A--FRAMEFRAME


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ADVANTAGESDVANTAGESoffSEPLA ANCHOREPLA ANCHOR


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ADVANTAGES OFFERED BY SEPLAADVANTAGES OFFERED BY SEPLA

GeotechnicallyGeotechnically more efficient thanmore efficient than SEAsSEAs Significantly less costly thanSignificantly less costly than SEAsSEAs (1/2 to 1/3 the cost of a(1/2 to 1/3 the cost of a

comparable SEA)comparable SEA)

System designed to be recoverableSystem designed to be recoverable Nothing mechanical left subsea (Nothing mechanical left subsea (ieie valves)valves)

Multiple SEPLAs might be carried on an installation vessel dueMultiple SEPLAs might be carried on an installation vessel due

to their smaller sizeto their smaller size Desired geographical position and depth penetration can beDesired geographical position and depth penetration can be

readily achieved (compared to drag VLAs)readily achieved (compared to drag VLAs)

Design can be extrapolated to high capacity types in very deepDesign can be extrapolated to high capacity types in very deepwater in a practical fashionwater in a practical fashion


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SEPLA COST SAVINGSSEPLA COST SAVINGS

Esso Angola Claims a Savings of $4.5 MillionEsso Angola Claims a Savings of $4.5 Millionfor Using SEPLAs over Suction Anchors forfor Using SEPLAs over Suction Anchors forKizomba A / Xikomba Drilling Program (18+1Kizomba A / Xikomba Drilling Program (18+1

Anchors)Anchors) Recent Proposal for GOM DevelopmentRecent Proposal for GOM Development

Drilling ProgramDrilling Program

SEPLA Anchor System Saves 60% over theSEPLA Anchor System Saves 60% over theSuction Anchor System (for 8 Legs SavesSuction Anchor System (for 8 Legs Saves~$1 million)~$1 million)

SEPLA Anchor System Installation is 2SEPLA Anchor System Installation is 2--33Days Shorter than Suction Anchor SystemDays Shorter than Suction Anchor SystemInstallationInstallation


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SEPLA vs Suction Anchor Size ComparisonSEPLA vs Suction Anchor Size Comparison

MODU ExampleMODU Example

Suction AnchorSuction Anchor

9.5 ft dia x 70 ft9.5 ft dia x 70 ft

Weight 68 tonsWeight 68 tons

SEPLASEPLA

8 ft x 20 ft8 ft x 20 ft

Weight 24 tons (solid fluke)Weight 24 tons (solid fluke)

Red Hawk ExampleRed Hawk Example Suction AnchorSuction Anchor

18 ft dia x 78 ft18 ft dia x 78 ft

Weight 180 tonsWeight 180 tons

SEPLASEPLA 15 ft x 30 ft15 ft x 30 ft

Weight 50 tons (solid fluke),Weight 50 tons (solid fluke),37 tons (hollow fluke)37 tons (hollow fluke)

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ANCLAJE SEPLA