Trenchless Technology HDD drilling machines and piercing tools

Clase HDD: 4 - 6 toneladas, máquina para zanja pequeña

Pit launche machine out of a manhole - the MINI-JET MJS 1600

    Imagine being able to use existing sewer manholes to lay networks for electricity, gas and water without the need to dig up roadways or front gardens of private properties.

    Swiss producer of trenchless pipe and cable laying equipment TERRA AG has developed such a manhole HDD drill that is able to undertake directional bores from manhole to manhole and from manhole to all near-by homes. At 0.8 m (2.5 ft) depth you can lay telephone cables, at 1.20 m (4”) depth fresh water lines, and at 1.60 m (5 ft) depth gas or power lines.

    This innovative pipe laying method was developed over a 2 year period in close co-operation with the French water supplier SADE.

    The TERRA MINI-JET MJS 1600 is a manhole HDD drill for directional bores in lengths up to 50 m (165 ft) with a minimum turning radius of 15 m (50 ft). The directional bore can be reamed in several steps up to 300 mm (12”) even in hard ground. The TERRA MINI-JET MJS 1600 is equipped with a torque of 1600 Nm (1200 ft.lbs) and thrust and pull back forces of 60 kN (6 tons, 13’200 lbs).

Pit launche machine out of a manhole - the MINI-JET MJS 1600
Pit launche machine out of a manhole - the MINI-JET MJS 1600

Operation form a manhole

    The MJS 1600 can drill from manholes with an internal diameter of 1.0 m (3.3 ft) and can fit through manhole entrances of just 0.62 m (25”). Where the entrance is smaller than this, the manhole cover frame can be removed. First the drill’s bed frame is lowered into place in the manhole and tightened hydraulically in position, thereafter the manhole drill is lifted vertically through the manhole cover and bolted onto the bed frame. Drilling and back reaming takes place with bentonite drilling fluid pressure of 0-55 bar (0-800 psi) and drilling fluid volumes of 0-38 ltr/min (0-9 gpm). This makes the TERRA MINI-JET MJS 1600 a small but extremely effective horizontal directional drilling (HDD) machine.

Operation form a manhole
Operation form a manhole

The Operator's Stand

    The entire operation of the TERRA MINI-JET MJS 1600 is controlled from the surface where the operator along with the control station, rod magazine and rod lift are positioned.

    There is no requirement to enter the manhole during drilling and back reaming work. The operator inserts a new drill rod into the rod lift. The rod lift transfers it down into the manhole and positions it in the drilling machine.

    The new drill rod is screwed into the last drill rod. Inductive sensors make this operation possible even where the operator does not have a view into the manhole. The rod lift may also be positioned at an angle over the drilling machine where the manhole entrance is not located directly on top of the drilling machine.

The Operator's Stand
The Operator's Stand

Agregado de Diesel

  1. Motor a Diesel KUBOTA con 3 cylindros con 24 kW (33 PS)
  2. Motor a Diesel con 2.550 R/min
  3. Con 2 circulaciones hydráulicas independientes
    56 l/min con 175 bar para la cureña de fosa
    28 l/min con 125 bar para la estación mezcladora-bombeo
  4. Caja de/para documentación
  5. Refrigerador de aceite grande con 6.4 kW Potencia de refrigeración, lo que también permite su uso en zonas tropicales y desérticas
  6. De facil mantenimiento
  7. Influencia ambiental y social positiva, debido al motor supersilencioso
  8. Salida de 12 Voltios con 5 A (60 W)

Agregado de Diesel
Agregado de Diesel

Mezclado y bombeo hydráulico

  1. Con tanque de 1.100 litros separado
  2. Para Bentonita o Ejactomer (líquido lubrificante)
  3. Con apoyo/soporte para 2 bolsas de bentonita à 25 kg
  4. La Bentonita se puede volcar directamente al embudo
  5. Bomba mezcladora con 800 l/min
  6. Inyector según el principio de baja presión
  7. 1.100 litros de líquido de lavar, se prepara en solo 4 min. con Bentonita
  8. Bomba de líquido de lavar de alta presión de FMC
  9. Volúmen de lavar máximo: 38 l/min.
  10. Presión de lavar máxima : 55 bar

Mezclado y bombeo hydráulico
Mezclado y bombeo hydráulico


Datos técnicos

Datos técnicos

*   Todos los datos dependen de las características del subsuelo.
** Depending on drill rod size
TERRA AG se reserva el derecho de cambios técnicos en cualquier momento.
Fuerza de retracción
6 to (60 kN)
13'200 lbs (6.6 US tons)
Fuerza de perforación
6 to (60 kN)
13'200 lbs (6.6 US tons)
Potencia motriz
24 kW (33 PS)
24 kW (33 HP)
Par, nivel 1
1600 Nm
1200 ft.lbs
Par, nivel 2
No. revoluciones varillas, nivel 1
0-115 U/min
0-115 rpm
No. revoluciones varillas, nivel 2
Volumen de enjuague
38 l/min
10 gpm
Presín máx. de enjuague
55 bar
800 psi
drilling speed - quick gear
10 m/min
33 ft/min
1.5 m/min
5 ft/min
Carga acústica a 7 m de distancia
Carga acústica para el operador
Perforación piloto
Ø 60 - 100 mm
Ø 2.4" - 4"
Diámetro de ensanche máximo
Ø 260 mm
Ø 10"
Largo máximo de perforación*
40 m
130 ft
Largo de varillas
0.39 m
1.28 ft
Diámetro de varillas
Ø 47/30 mm
Ø 1.85"/1.2"
Radio de flexión tubería a colocarse**
50 ft
Medidas de la cureña largo x ancho x alto
1 x 0.55 x 0.80 m
3.3 x 1.82 x 2.64 ft
Dimensions LxBxH Control Station
1.65 x 0.55 x 2.31 m
5.45 x 1.82 x 7.62 ft
Peso de la cureña
300 kg
660 lbs
Weight Controll station
170 kg
560 lbs


TERRA AG für Tiefbautechnik - Hauptstrasse 92 - 6260 Reiden - Schweiz - Tel. +41 62 749 10 10 -