

  HW DCDMA Borehole Wireline Drill Pipe Casing For Geotechnical Environmental Drilling
   
  HW DCDMA borehole wireline casing tubes
   
  This casing is intended for single use or situations where the casing is left in the hole. The HW
  casing is made from DCDMA  tubing and utilize the DCDMA W thread form. The HW thread is a
  straight thread (4 threads per inch). This casing is universal in design and can be used in any drilling
  application where threaded casing is required to be left in the ground.
  Features
  TUBING
  Parallel wall tubing compatible with Wireline in-hole tools
  Standard DCDMA W sizes allow  ‘nesting’ of other W casing
  THREAD DESIGN
  Double-butt joint gives strength in driving and jarring
   
| Type | O.D./ I.D. | Recommended Drilling Depth | 
| B/WL Drill Rod | Φ55.6mm/Φ46mm | 1200m | 
| N/WL Drill Rod | Φ70.1mm/Φ60.1mm | 1800m | 
| H/WL Drill Rod | Φ88.9mm/Φ77.8mm | 1800m | 
| P/WL Drill Rod | Φ114.3mm/Φ101.6mm | 1800m | 
| W Casing paramters | ||||||
| Std | OD (mm) | ID (mm) | Wall Thickness (mm)  |   			Thread Pitch (mm)  |   			Pin Thread Length (mm)  |   			Weight (kg/m)  |   		
| AW | 57.20 | 48.40 | 4.40 | 6.35 | 57.20 | 6.00 | 
| BW | 73.00 | 60.30 | 6.00 | 6.35 | 63.50 | 11.00 | 
| NW | 88.90 | 76.20 | 6.35 | 6.35 | 69.90 | 13.30 | 
| HW | 114.30 | 101.60 | 6.35 | 6.35 | 76.20 | 17.30 | 
| PW | 139.70 | 127.00 | 6.35 | 8.47 | 82.60 | 23.30 |