Technique for steering and monitoring the orientation of a power

Details Technique for steering and monitoring the orientation of a power Technique for steering and monitoring the orientation of a power

1986-05-22

1987-12-22

Novosad, Stephen J.

Boring or penetrating the earth

Automatic control

Of boring means including a below-ground drive prime mover

175 45, 175 61, 175 62, 175 67, 175162, E21B 708, E21B 4400

Patent

active

047141182

ABSTRACT:
A technique for providing a continuous underground tunnel is disclosed herein. This technique utilizes an elongated boring device including a forward facing, off-axis high pressure fluid jet which is rotated about the elongated axis of the device while the latter is urged forward through the soil, whereby to cause the device to bore a tunnel through the soil as it moves forward. In accordance with one feature of this technique, the boring device is steered by modulating the speed and/or the direction of rotation of its off-axis fluid jet in a way which depends upon the desired direction to be taken by the boring device within the soil. In accordance with another feature of the overall technique, the pitch angle of the boring device, as defined by its elongation axis, is monitored relative to a horizontal ground plane, independent of the roll position of the device. In accordance with still another feature of the technique, the roll angle of the boring device and the position of its off-axis jet are simultaneously monitored whereby to monitor the precise rotational position of the jet relative to its roll position.

REFERENCES:
patent: 3465834 (1969-09-01), Southworth, Jr.
patent: 3712391 (1973-01-01), Coyne
patent: 3853185 (1974-12-01), Dahl et al.
patent: 3870111 (1975-03-01), Tuomela et al.
patent: 3891038 (1975-06-01), Delestrade et al.
patent: 4625815 (1986-12-01), Spies
patent: 4640353 (1987-02-01), Schuh

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