Boring or penetrating the earth – Automatic control – Of advance or applied tool weight
Patent
1985-05-21
1987-06-09
Novosad, Stephen J.
Boring or penetrating the earth
Automatic control
Of advance or applied tool weight
173 2, E21B 306
Patent
active
046713662
ABSTRACT:
A method for optimizing percussive drilling, especially rock drilling, in which method the operation of the drilling device is adjusted for a desired drilling result to be obtained. According to the invention, a stress wave created in a drill rod as a result of a stroke is measured and the drilling device is adjusted on the basis of the measured stress wave. The adjusting is carried out e.g. by means of the damping rate or the spectrum of the measured stress wave or the shape of the stress wave and/or the energy fed by the different portions thereof.
REFERENCES:
patent: 3464503 (1969-09-01), Houck
patent: 3780814 (1973-12-01), Herb
patent: 4109475 (1978-08-01), Schnell
patent: 4195699 (1980-04-01), Rogers et al.
patent: 4354233 (1982-10-01), Zhukousky et al.
Julkunen Pasi
Kiikka Timo
Latva-Pukkila Pasi
Uitto Vesa
Neuder William P.
Novosad Stephen J.
OY Tampella AB
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