Chris Tai Devico AS Regional Manager www.devico.no 30th Nov 2007 Directional Drilling What can Devico technology help in Tunnelling Projects For Hong Kong Tunnelling Society Chris Tai Devico AS Regional Manager www.devico.no 30th Nov 2007

Devico AS – The Company Founded in 1988 by Mr. Viktor Tokle, the inventor of Devico Technologies Norway based with branches in North America, Bulgaria and Hong Kong All tools and equipment are made and calibrated in our own workshop in Norway 30+ employees worldwide

CEDD/GEO TGN-24 (21-Jan-05) GEO Technical Guidance Notes 24 Site Investigation for Tunnel Works “3.1 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.”

TGN-24 “4.1 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 - Definition The direction of drilling can be controlled The drill hole is drilled to follow the pre-defined drill hole trajectory as close as possible The drill hole is drilled to hit the pre-defined target

Directional Drilling - Definition

Directional Drilling - Definition

Product

Product

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 length Recommended dogleg = 9deg/30m ( R=180m ) Max. dogleg = 12deg/30m Onboard survey tool Measure while drilling (MWD) Requires no reaming out Bluetooth communication

Dogleg A jargon in directional drilling industry Three dimensional (3D) borehole trajectory Expressed in terms of deg/30m E.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/ batteries Diameter : 30mm / 1.18” Length = 975mm / 38.4” Battery Capacity : ~40,000 measures Internal Memory : 1,984 measures Temperature : -15 to 75oC (5 to 167oF) Pressure : 300bar / 4350psi Azimuth Range : 0o-360o Inclination Range : 0o-180o Bluetooth communication Accuracy :- Inclination : 0.2o Azimuth : 0.5o Toolface (Gravity) : 0.2o Toolface (Magnetic) : 1o

DeviFlex Technical Specification Electronic Multishot System (EMS) Weight : 20kg Diameter : 40mm Length = 4m Battery Capacity : 3-4months (continues) Internal Memory : 1,984 measures Temperature : -15 to 75oC (5 to 167oF) Pressure : 300bar / 4350psi Inclination Range : 0o-180o Bluetooth communication Accuracy :- Inclination : 0.2o Azimuth : 0.01o/station Toolface (Gravity) : 0.2o

Applications Geotechnical projects – Drill to follow the tunnel alignment to investigate the geological information Mining industry – Multilateral borehole drilling, sidetracking Target drilling – By pass certain area under the ground and hit the ultimate target

DeviCase – Eagle’s Nest Tunnel (HKG)

DeviCase – Eagle’s Nest Tunnel (HKG)

DeviCase – Po Shan Road (HKG)

DeviCase – New York City (USA) Water supply tunnel in New York City Site under Manhattan Bridge Start angle -45 Degree to horizontal Length 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 – Bømlafjord (Norway) Subsea tunnel Length 930 m Reduced risk Improved 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