Public © 2013 Aker Solutions Preferred partner Arctic Drillship Henrik Hannus Vice President | Deepwater and Arctic Solutions
Public © 2013 Aker Solutions Preferred partner
Preferred partner
Arctic Drillship
Henrik HannusVice President | Deepwater and Arctic Solutions
Public © 2013 Aker Solutions Preferred partner
Background and introduction
Substantial O&G reserves in the ArcticsOur ambition: “The Preferred Partner”Uncertain development timelines Technology investments risky
Slide 2
ChukchiBeaufort
Kara EastBarents
East
Greenland
West
OIL
(Bill
ion
BB
L)
GAS
(Tril
lion
CF)
Yamal
Public © 2013 Aker Solutions Preferred partner05/11/2013 Slide 3
Regional Opportunities
Public © 2013 Aker Solutions Preferred partnerSlide 4
Arctic Challenges
Vulnerable eco-systemDevelopmentAccident consequences
Extreme temperaturesIce conditionsLimited infrastructure Long tie-back distancesLong distance to marketLimited Daylight (Winter season)Limited weather window:
Construction, Installation, Hook-up & Completion
Personnel Health and Safety
Public © 2013 Aker Solutions Preferred partner
What’s different (compared to the North Sea)?
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Level ice
Ice ridge Rubble field
Icebergs
Ice ridge – Cross section
Public © 2013 Aker Solutions Preferred partnerSlide 6
Experience from the Arctic
Kulluk drilling buoyMoored floaterDrilling in the 80`sDesigned for sea iceHeavy ice managment and disconnectable
MoliqpaqBottom founded caissonDrillingDesigned for sea ice
Sakhalin II GBS structuresBottom founded multi-leg structureProduction and drillingDesigned for sea ice
Terra Nova/White RoseFPSO with disconnectable turret systemProductionIcebergs – no sea ice
Kulluk Molikpaq
Sakhalin II GBS Terra Nova
Public © 2013 Aker Solutions Preferred partner
Johan Castberg (Statoil)
Screening study (completed)Shallow draught buoyFPSOSemi Submersible
Concept study (ongoing)Semi SubmersibleFPSO
5 November, 2013Slide 7
Public © 2013 Aker Solutions Preferred partner
Amauligak (ConocoPhillips)
Beafourt SeaField Development Concept ScreeningEarly phase sizing of different substructures and topsides
5 November, 2013Slide 8
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Arctic Drillship Development Joint Cooperation between Aker Solutions and Aker Arctic
Target: Kara, Beafourt, Chucki Sea drilling
2012-2013Design of drillshipIce Model Test at Aker ArcticOutline Specification development for Yard inquiry
Status August 2013: Interacting w. yards and drilling contractors
5 November, 2013 Aker Solutions Arctic DrillshipSlide 9 5 November, 2013Slide 9
AARC: Ship design for ice covered waters
AKSO: Platform and drilling design for harsh environment
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Design BasisWell depth: Total depth of 7500 m
Operations in open water90 % operability for North Atlantic wave conditions
Operations in ice:Drilling: Ice conditions equivalent to 1.5 m level ice –90% concentration – Floe size 150-200 mSurvival: Ice conditions equivalent to 1.5 m intact level ice
Response restrictions for operation:Drilling operation: Offset corresponding to 2 deg Drill string connected: Offset corresponding to 6.5 degDrill string disconnected no offset restrictionTurret design for 10 deg riser angle
Constant draft
5 November, 2013 Aker Solutions Arctic DrillshipSlide 10 5 November, 2013Slide 10
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Design Basis
Operations in late ice season, summer and early ice season
Exploration wellsCoil tubing & wireline operationsRunning and pulling X-mas treeWell testing and flaring
Operational water depth: 1500 mDrilling in ice and open water (>100 m): Turret MooredDrilling in open water: Dynamic positioningsystem (DP3)
1 ½ conventional triple stand derrick
Two BOP stacks
5 November, 2013 Aker Solutions Arctic DrillshipSlide 11 5 November, 2013Slide 11
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Arctic Drillship - General DataOperating displacement: 89 000 tonnesDimensions:
LOA: 232 mB: 42 m
Accomodation for 160 in Single Bed Cabins 12 line mooring system Thrusters:
FWD: Two nozzle retractable thruster - to be retracted in ice AFT: Three open podded thrusters - suitable for operation in ice
DnV +1A1, DRILL (N), CRANE, HELDK-SH,F-AM, EO, DP Class 3 (DYNPOS AUTRO, POSMOOR ATA, Classification for operation in ice: PC5, DAT(-40°C) Classification notation, Russian Maritime Register of Shipping (RMRS): KM() Arc6 [1] A1 DYNPOS -2
5 November, 2013 Aker Solutions Arctic DrillshipSlide 12 5 November, 2013Slide 12
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Arctic Features
Hull lines optimised for iceCladded drilling topside and derrickFWD turret
Operability in iceHandling from one side into derrick
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Large HVAC facilityLQ aftLow CoGDisconnectable turret
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Hull side view
5 November, 2013 Aker Solutions Arctic DrillshipSlide 14
Ice breaking reamer
Ice breaking zone
Azipodplateau
Public © 2013 Aker Solutions Preferred partnerDate Month 2011Slide 15
Drilling Steps at Disconnection due to Sea IceIce survey (recon) - days
Stop drillingCirculate and condition mudPOOH Install deep plug in casingInstall shallow plug in casingRetrieve BOPInstall cap on top of wellheadPrepare and move off location
Ice management failure - hoursStop drillingCirculate and condition mudPOOH into casingInstall hang off toolClose BOP and change riser to waterDisconnect LMRPPrepare and move off location
Emergency - minutesStop drillingPull off bottomHang off string in BOPCut string with shear ramDisconnect LMRPMove off location
Public © 2013 Aker Solutions Preferred partnerDate Month 2012Slide 16
Disconnectable turret - Principles
Quick release turret (Tentech)
• Quick riser connectors
• Risers and moorings attached to release buoy
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Model Test Results
Limited ice transport below baseline or in area with drilling riserMeasured mooring load for 170 degree level ice drift reversal tests
Highest load experience in intact ice Intact ice + using thruster – 50 % reduction of loadsIce management – 50 % reduction of mooring load
Intact ice vs 90 % concentrationFor 200, 100 and 50 m floe sizes
Ice management + use of thusters – 60 % reduction in mooring load
5 November, 2013 Aker Solutions Arctic DrillshipSlide 17
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Model updated for target properties
5 November, 2013 Aker Solutions Arctic DrillshipSlide 18
Numerical simulations updated for actualice properties, ice failing scenario and observed ice transport
Model updated for non-linear mooring system
100 m water depth400 m water depth
Check towards target ice conditionsManaged ice (90 % concentration) gave reduction of responses equal to 50 % or more
Public © 2013 Aker Solutions Preferred partner
Challenges
Hull shape to limit ice loadsMooring disconnection
Under load - reliabilityBuoy requires riser retrieval => long time
Mooring re-connectionIndividual lines => long time
Riser protectionWinterization of facilities
22. April 208Slide 19
Buoy concept need no turret(but other challenges)
Public © 2013 Aker Solutions Preferred partner
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Slide 20 5 November, 2013