Down hole production and exploration machinery for use in oil, gas, or geothermal wells, namely, [ Drill bits, ] drill pipes, [ drill collars, drill motors, jars, stabilizers, reamers, drill liners and casings, top head drive and swivels, subassemblies and hydraulic hammers ]

'bit':17 'case':30 'collar':21 'drill':16,18,20,22,27 'drive':33 'explor':5 'gas':11 'geotherm':13 'hammer':39 'head':32 'hole':2 'hydraul':38 'jar':24 'liner':28 'machineri':6 'motor':23 'name':15 'oil':10 'pipe':19 'product':3 'reamer':26 'stabil':25 'subassembl':36 'swivel':35 'top':31 'use':8 'well':14

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