The results are promising. The TERRA-JET 3008 ES provides HDD bores in lengths up to 100 m (420 ft) and backream diameters up to 420 mm/16.5”. The bores may have curves with a minimum bending radius of R = 24 m. The high torque of 3’000 Nm and the high thrust and pullback forces of 80 kN (8 tons) are unique. It allows HDD bores in hard ground.
[restabs alignment=”osc-tabs-left” responsive=”false”]
[restab title=”Pit launch” active=”active”]The TERRA-JET 3008 ES can be pit or surface launched. This HDD system has a modular design. Its main components are the pit frame, the hydraulic power pack and the mixing+pumping station.
With its 2 separated hydraulic circuits for thrust and rotation, the TERRA-JET 3008 ES can operate simultaneously at maximum torque and maximum thrust or pullback force. The hydro-chain-drive has the highest efficiency rate, low wear and is dirt resistant. Due to the movable break-apart-system.[/restab]
[restab title=”Perkins power pack”]
The PERKINS Powered 3008 ES drives the pit frame and the mixing+pumping station. As an option, it can be equipped with a Diesel particulate filter (DPF), which fulfils the strictest anti-pollution norms. [/restab]
[restab title=”ADBS”]The TERRA-JET 3008 ES is equipped with a second generation Automatic Drilling and Backreaming System (ADBS).
This patented system automatically and within milliseconds adjusts the working speed of the drill to suite the ground conditions. In soft ground the drill operates at maximum speed, in hard ground slowly, but always at the optimum speed.
This allows the operator to operate the drill at maximum efficiency in a controlled and relaxed manner and prevents the drill rods and drilling tools from being overloaded. During the pilot bore the ADBS controls the thrust force. If the drill head hits an unexpected obstacle, the ADBS stops the drilling speed immediately and drills very slowly through the obstacle. All automatically!
[/restab] [restab title=”Technical Data”]| Technical Data | |||
|---|---|---|---|
| * Depending on ground conditions ** Depending on drill rod size Technical specifications can be changed without previous notice. |
|||
| pullback force |
8 to (80 kN)
|
17’600 ft.lbs (9 US tons)
|
|
| thrust force |
8 to (80 kN)
|
17’600 ft.lbs (9 US tons)
|
|
| driving power |
44 kW (60 PS)
|
44 kW (60 HP)
|
|
| torque, 1st speed |
3’000 Nm
|
1’920 ft.lbs
|
|
| drill rod rotation speed, 1st speed |
0 – 63 U/min
|
0 – 63 rpm
|
|
| drill rod rotation speed, 2nd speed | |||
| drilling fluid volume |
100 l/min
|
26 gpm
|
|
| maximum drilling fluid pressure |
70 bar
|
1000 psi
|
|
| drilling speed – quick gear |
14 m/min
|
46 ft/min
|
|
|
14 m/min
|
46 ft/min
|
||
| drilling speed – at full load |
14 m/min
|
46 ft/min
|
|
| noise emission in 7 m distance |
–
|
–
|
|
| noise emission at operators ear |
–
|
–
|
|
| pilot bore diameter |
ø 60 – 100 mm
|
Ø 2.4″ – 4″
|
|
| maximum backream diameter* |
ø 420 mm
|
ø 16.5″
|
|
| maximum drilling length * |
150 m
|
500 ft
|
|
| drill rods, length |
1.0 m
|
3.3 ft
|
|
| drill rods, diameter |
ø 57 / 54 mm
|
ø 2.25 / 2.12 “
|
|
| minimum turning radius** |
24 m
|
80 ft
|
|
| Dimensions pit cradle LxWxH |
2.0 x 0.90 x 1.25 m
|
6.6 x 3.0 x 4.1 ft
|
|
| dimensions hydraulic power pack LxWxH |
1.95 x 0.94 x 1.75 m
|
6.5 x 3.1 x 5.78 ft
|
|
| dimensions Mixing and Pumping Station LxWxH |
1.45 x 0.75 x 1.0 m
|
4.8 x 2.5 x 3.3 ft
|
|
| weight of the pit cradle |
1’000 kg
|
2’200 lbs
|
|
| weight of hydraulic power pack |
900 kg
|
1980 lbs
|
|
| weight of Mixing and Pumping Station |
205 kg
|
451 lbs
|
|