Swiss manufacturer TERRA AG has unveiled its S-Series Horizontal Directional Drilling (HDD) range, setting new standards in HDD machinery.
The TERRA-JET 5415 S2 may drill directional bores up to 250 m (825 ft) length and 520 mm (20.5") diameter (depending on ground conditions). It is driven by a 97 kW (132 HP) powered diesel engine, which is “clean” and fulfils the required “green” emission regulations for some years to come. Torque and pullback force are produced by separated hydraulic circuits allowing the maximum torque of 5'400 Nm and the maximum pullback force of 150 kN (15 tons) to be used simultaneously under full load. A rarity nowadays in HDD machines!
The drilling fluid volume is 400 ltr/min at a maximum fluid pressure of 19 bars. The external mixing system mixes the Bentonite into the drilling fluid via an injector (venture hopper).
The TERRA-JET 5415 S2 is compact and manoeuvrable in spite of its high power output and superior operating capabilities. It is only 2.25 m wide and 6.6 m long which allows operation in confined city spaces. It can be easily transported with an operational weight of 9.2 tonnes.