Method for steering a ground-drilling machine
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United States of America Patent
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-
Jan 11, 2000
Grant Date -
N/A
app pub date -
Feb 12, 1997
filing date -
Feb 27, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention pertains to a method for steering a ground drilling machine, in particular, a pipe string assembly with a drilling head which is driven in the ground in rotative, propulsive and, if so desired, percussive fashion, in which at least one deflection pulse is exerted upon the rotating drilling head or the pulses acting upon the drilling head are interrupted when the angular position of the drilling head relative its axis corresponds to the position in which the deflection should take place.
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