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1: Machine in readiness
to carry out the pilot bore, with the steering
head and sonde housing about to enter the start
pit. |
2: One of MPC's Directional
Drilling machines in operation with the pilot
bore being carried out. Bore distance approximately
95m. |
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3: The 60mm steering
head arriving in the exit trench after completing
the 95m pilot bore in 1 hour and 35 minutes. |
4: 235mm Backreamer ready
to tow the 125mm PE cable ducts back through the
bore. |
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5: After removing
the steering head, we carried out a pre-ream using
a 200mm diameter three wing cutter and a 235mm
backreamer. During this operation, we towed a
set of rods behind the swivel in readiness for
the final back- reaming operation. |
6: The cutter and backreamer
arriving back at the start trench after approximately
2 hours. |
| 7: 125mm PE cable being dispensed
from a coil trailer during the final backreaming
operation, which was completed in one hour. (N.B.
This does not include the time taken to collect
and then butt fuse together the PE cable ducts. |
Summary of Advantages:
1) For pipe installations up to ND 355.
2) For bore lengths up to 300m.
3) Minimal setup time - high productivity.
4) Radii up to 42m.
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