automatic drilling machines used to control drilling and automatically identify when stick-slip exceeds user-defined thresholds, and trigger modulation of torsional oscillation; mechanical downhole drilling tools for wellbore construction for oil, gas, geothermal and other types of drilling

'automat':1,9 'construct':32 'control':6 'defin':18 'downhol':27 'drill':2,7,28,41 'exceed':15 'gas':35 'geotherm':36 'identifi':10 'machin':3 'mechan':26 'modul':22 'oil':34 'oscil':25 'slip':14 'stick':13 'stick-slip':12 'threshold':19 'tool':29 'torsion':24 'trigger':21 'type':39 'use':4 'user':17 'user-defin':16 'wellbor':31

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