Directional DrillingWhat can Devico technology help inTunnelling Projects

For Hong Kong Tunnelling SocietyChris Tai Devico AS Regional Managerwww.devico.no

30th Nov 2007

Devico AS The CompanyFounded in 1988 by Mr. Viktor Tokle, the inventor of Devico TechnologiesNorway based with branches in North America, Bulgaria and Hong KongAll tools and equipment are made and calibrated in our own workshop in Norway30+ employees worldwide*

CEDD/GEO TGN-24 (21-Jan-05)GEO Technical Guidance Notes 24Site Investigation for Tunnel Works3.1 Drilling of the horizontal boreholes can be carried out either from the excavation face, an intermediate shaft or from the other end of the tunnel to investigate the ground conditions, in particular to check whether suspected features of poor ground are present and if so their nature and extent.

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TGN-244.1 Directional drilling techniques are now available to drill from ground level to great depth and then along a horizontal alignment. This method does not require provision of working space at the tunnel level and can be very useful in GI for deep tunnels.*

Directional Drilling - DefinitionThe direction of drilling can be controlledThe drill hole is drilled to follow the pre-defined drill hole trajectory as close as possibleThe drill hole is drilled to hit the pre-defined target*

Directional Drilling - Definition*

Directional Drilling - Definition*

Product*

Product*

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Devico Method A complete solution*Planning

Drilling

Surveying

Devico Method DeviSoft Planning*

Devico Method DeviDrill WL 76 Drillling*

DeviDrill Wireline 76 (US Patent : 6,516,900)Technical Specification

Hole : N-Size (76mm) Core : 31.5mm / 3m lengthRecommended dogleg = 9deg/30m ( R=180m )Max. dogleg = 12deg/30mOnboard survey toolMeasure while drilling (MWD)Requires no reaming outBluetooth communication

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DoglegA jargon in directional drilling industryThree dimensional (3D) borehole trajectoryExpressed in terms of deg/30mE.g. dogleg = 9 means deviated 9 degrees in 30m as a summation of both in inclination and azimuth(bearing)*

DeviTool Peewee*Technical Specification

Electronic Multishot System (EMS) Weight : 2.4 kg / 5.29lb w/ batteriesDiameter : 30mm / 1.18Length = 975mm / 38.4Battery Capacity : ~40,000 measuresInternal Memory : 1,984 measuresTemperature : -15 to 75oC (5 to 167oF)Pressure : 300bar / 4350psiAzimuth Range : 0o-360oInclination Range : 0o-180oBluetooth communicationAccuracy :-Inclination : 0.2oAzimuth : 0.5oToolface (Gravity) : 0.2oToolface (Magnetic) : 1o

DeviFlex*Technical Specification

Electronic Multishot System (EMS) Weight : 20kgDiameter : 40mmLength = 4mBattery Capacity : 3-4months (continues)Internal Memory : 1,984 measuresTemperature : -15 to 75oC (5 to 167oF)Pressure : 300bar / 4350psiInclination Range : 0o-180oBluetooth communicationAccuracy :-Inclination : 0.2oAzimuth : 0.01o/stationToolface (Gravity) : 0.2o

ApplicationsGeotechnical projects Drill to follow the tunnel alignment to investigate the geological informationMining industry Multilateral borehole drilling, sidetrackingTarget drilling By pass certain area under the ground and hit the ultimate target

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DeviCase Eagles Nest Tunnel (HKG)*

DeviCase Eagles Nest Tunnel (HKG)*

DeviCase Po Shan Road (HKG)*

DeviCase New York City (USA)*Water supply tunnel in New York CitySite under Manhattan Bridge Start angle -45 Degree to horizontalLength 900 m December 2002.Operator Kinectriks

DeviCase Shinkansen (Japan)* Tunnel for Shinkansen high speed train Length 500 meter Deviation 20 degrees Date Nov-Dec 2002 Operator Nikko Exploration

DeviCase Bmlafjord (Norway)*Subsea tunnel Length 930 mReduced riskImproved QA Resulted in redesigned tunnel allignment

DeviCase Boston (USA)* Metrowest water tunnel Length 700 meter Reduced risk and better bids

DeviCase Aurora / Guyana (S. America)*

DeviCase Shea Creek (Canada)*

Thank you*www.devico.no

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