1. 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
30th Nov 2007

2. 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

3. 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.”

4. 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.”

5. 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

6. Directional Drilling - Definition

7. Directional Drilling - Definition

8. Product

9. Product

11. Devico Method – A complete solution
Planning
Drilling
Surveying

12. Devico Method – DeviSoft Planning

13. Devico Method – DeviDrill WL 76 Drillling

14. 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

15. 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)

16. 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

17. 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

18. 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

19. DeviCase – Eagle’s Nest Tunnel (HKG)

20. DeviCase – Eagle’s Nest Tunnel (HKG)

21. DeviCase – Po Shan Road (HKG)

22. 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

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

24. DeviCase – Bømlafjord (Norway)
Subsea tunnel
Length 930 m
Reduced risk
Improved QA
Resulted in redesigned tunnel allignment

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

26. DeviCase – Aurora / Guyana (S. America)

27. DeviCase – Shea Creek (Canada)

28. Thank you