Directional Drilling What can Devico technology help in

Directional Drilling What can Devico technology help in Tunnelling Projects For Hong Kong Tunnelling Society Chris Tai Devico AS Regional Manager www. devico. no 30 th 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 2

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. ” 3

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. ” 4

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 5

Directional Drilling - Definition 6

Directional Drilling - Definition 7

Product 8

Product 9

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Devico Method – A complete solution Planning Drilling Surveying 11

Devico Method – Devi. Soft Planning 12

Devico Method – Devi. Drill WL 76 Drillling 13

Devi. Drill Wireline 76 (US Patent : 6, 516, 900) Technical Specification • Hole : N-Size (76 mm) • Core : 31. 5 mm / 3 m length • Recommended dogleg = 9 deg/30 m ( R=180 m ) • Max. dogleg = 12 deg/30 m • Onboard survey tool • Measure while drilling (MWD) • Requires no reaming out • Bluetooth communication 14

Dogleg • A jargon in directional drilling industry • Three dimensional (3 D) borehole trajectory • Expressed in terms of deg/30 m – E. g. dogleg = 9 means deviated 9 degrees in 30 m as a summation of both in inclination and azimuth(bearing) 15

Devi. Tool Peewee Technical Specification Electronic Multishot System (EMS) Weight : 2. 4 kg / 5. 29 lb w/ batteries Diameter : 30 mm / 1. 18” Length = 975 mm / 38. 4” Battery Capacity : ~40, 000 measures Internal Memory : 1, 984 measures Temperature : -15 to 75 o. C (5 to 167 o. F) Pressure : 300 bar / 4350 psi Azimuth Range : 0 o-360 o Inclination Range : 0 o-180 o Bluetooth communication Accuracy : Inclination : 0. 2 o Azimuth : 0. 5 o Toolface (Gravity) : 0. 2 o Toolface (Magnetic) : 1 o 16

Devi. Flex Technical Specification Electronic Multishot System (EMS) Weight : 20 kg Diameter : 40 mm Length = 4 m Battery Capacity : 3 -4 months (continues) Internal Memory : 1, 984 measures Temperature : -15 to 75 o. C (5 to 167 o. F) Pressure : 300 bar / 4350 psi Inclination Range : 0 o-180 o Bluetooth communication Accuracy : Inclination : 0. 2 o Azimuth : 0. 01 o/station Toolface (Gravity) : 0. 2 o 17

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 18

Devi. Case – Eagle’s Nest Tunnel (HKG) 19

Devi. Case – Eagle’s Nest Tunnel (HKG) 20

Devi. Case – Po Shan Road (HKG) 21

Devi. Case – New York City (USA) ØWater supply tunnel in New York City ØSite under Manhattan Bridge ØStart angle -45 Degree to horizontal ØLength 900 m ØDecember 2002. ØOperator Kinectriks 22

Devi. Case – Shinkansen (Japan) Ø Tunnel for Shinkansen high speed train Ø Length 500 meter Ø Deviation 20 degrees Ø Date Nov-Dec 2002 Ø Operator Nikko Exploration 23

Devi. Case – Bømlafjord (Norway) ØSubsea tunnel ØLength 930 m ØReduced risk ØImproved QA ØResulted in redesigned tunnel allignment 24

Devi. Case – Boston (USA) Ø Metrowest water tunnel Ø Length 700 meter Ø Reduced risk and better bids 25

Devi. Case – Aurora / Guyana (S. America) 26

Devi. Case – Shea Creek (Canada) 27

Thank you www. devico. no 28