Ce diaporama a bien été signalé.
Nous utilisons votre profil LinkedIn et vos données d’activité pour vous proposer des publicités personnalisées et pertinentes. Vous pouvez changer vos préférences de publicités à tout moment.

Ground Investigation by Horizontal Directional Drilling

1 652 vues

Publié le

Horizontal Directional Drilling (HDD)
• Working Principle
• Construction Procedure
• Recent Application
• Lessons Learnt
• Suggested Improvement

Publié dans : Ingénierie
  • Soyez le premier à commenter

Ground Investigation by Horizontal Directional Drilling

  1. 1. Ground Investigation by Horizontal Directional Drilling presented by Y. C. Lam & Tim Leung 21 May 2005
  2. 2. 2 Horizontal Directional Drilling (HDD) • Working Principle • Construction Procedure • Recent Application • Lessons Learnt • Suggested Improvement
  3. 3. 3 Working Principle • Define the trajectory and tolerance • Straight section - Conventional Wireline Drilling • Curve section - Steerable Drilling System • Navigation by toolface angle • Borehole surveying (i.e. to get the azimuth and inclination)
  4. 4. 6 Construction Procedure • Drilling Machine Setup Drilling Rig Setup Drilling in Operation
  5. 5. 7 Construction Procedure • Steering Adjustment Adjusting the Toolface
  6. 6. 8 Construction Procedure • Changing Bit DeviDrill BitNQ Bit
  7. 7. 9 Construction Procedure • Reading the Toolface
  8. 8. 10 Construction Procedure • Surveying DeviTool Verifying Data
  9. 9. 11 Construction Procedure • Sampling
  10. 10. 12 Recent Application • Route 8 – Eagle’s Nest Tunnel & Associated Works
  11. 11. 13 Route 8 between Cheung Sha Wan and Sha Tin
  12. 12. 14 Scope of this Site Investigation by HDD – Planning of Temporary Support Systems in Tunnels – Excavation Sequencing – Blasting Works – Grouting – Programming To facilitate:-
  13. 13. 15 HDD Successfully Drilled – 1151m long from North Portal – 516m long from South Portal (excluding the reservation pipe length of 34m)
  14. 14. 16 HDD Successfully Drilled South Portal North Portal 516m long HDD 1151m long HDD
  15. 15. 17 Equipment Employed for HDD – Rotary Drilling Rig – Devico Directional Drilling Equipment – DeviDrill – DeviTool – Peewee – Conventional Wireline Drilling – NQU Wireline Drilling System – Mud Pump
  16. 16. 18 Grouting Unit – Mixer – Agitator – Grout Pump – Inflatable Packer
  17. 17. 19 Rotary Drilling Rig For the first 550m drilling while Hydraulic Drilling Rig
  18. 18. 20 Drill Rods DeviDrill core length in maximum of 3m NQU wireline drilling system coring in length of 6m Casing Platform
  19. 19. 21 Devico Directional Drilling Equipment “DeviDrill” is a wireline operated steerable core barrel
  20. 20. 22 Devico Directional Drilling Equipment Diamond Bit and Adjustable Eccentric Housing Diamond bit Adjustable eccentric housing
  21. 21. 23 Devico Directional Drilling Equipment DeviDrill Bit in N-Size
  22. 22. 24 Devico Directional Drilling Equipment “DeviTool” is to record information from 3D-magnetometers and accelerometers to define magnetic and gravity tool face, azimuth and inclination of the borehole DeviTool
  23. 23. 25 Devico Directional Drilling Equipment “Peewee” is a small diameter electronic multi-shot survey device
  24. 24. 26 Water Outflow Measurement – Collection Basic – Settlement Tank – Measuring Tank – Flow Meter + Pressure Transducer – Datalogger + Desktop Computer – Wireline Packer
  25. 25. 27 Water Outflow Measurement Datalogger Flow Meter
  26. 26. 28 Site Constraints – At North Portal – Site formation works completed in advance under SHT Contract – Sufficient working spaces, no particular site constraint – At South Portal – Not enough working space – Concerns with respect to the existing WSD Tai Po Road Treatment Works, i.e. underground water tank and filter bed
  27. 27. 29 Setting Up for HDD at North Portal Setting up for HDD Northbound Tunnel Southbound Tunnel
  28. 28. 30 HDD & Tunnel Excavation in progress
  29. 29. 31 Site Formation Works at South Portal Setting up HDD at the rear of South Portal
  30. 30. 32 Site Setting Up at South Portal – Setting up Hydraulic Drilling Rig Hydraulic Drilling Rig
  31. 31. 33 Site Setting Up at South Portal – Set up Hydraulic Drilling Rig and Drill Rod
  32. 32. 34 Site Setting Up at South Portal – Setting up Temporary Platform for supporting steel casing Temporary Platform
  33. 33. 35 Site Setting Up at South Portal – Drill Rod to be extended into the terrain
  34. 34. 36 Site Setting Up at South Portal – Toolface Orientation Temporary Platform
  35. 35. 37 Site Setting Up at South Portal – Control Panel for Drilling Operation
  36. 36. 38 Site Setting Up at South Portal – Drilling in Operation and Safety Fencing
  37. 37. 39 Lessons Learnt • Correct use of drill bit affects progress; • Steering rate is obtainable initially upon literature; • Actual rate is affected by the geology significantly; therefore, a more precise or site-specific rate should be verified by the available GI information • High water pressure (i.e. 25 bar) should be kept especially at steering
  38. 38. 40 Lessons Learnt • Refurbishing drill bit (without replacing) by lowering the RPM and maintaining a constant penetration rate; • Optimal bend radius – 1.2o/10m; • Maximum bend radius – 4.8o/10m; • Straight Section – 30m/day (average); • Curve Section – 8m/day (average)
  39. 39. 41 Further Enhancement • Modified steering barrel to get toolface angle information (i.e. by acoustic / EM wave) without retracting the inner tube • Joint orientation mapped with reference to the azimuth reading taken by the accelerometer and magnetometer
  40. 40. 42 Thank You

×