component parts of ground drilling systems, namely, ground drills and drill rigs; drill bits, namely, core drill bits and drill bits composed of individual segments; drill bit segments; reamers; reamer segments; running tools; overshots; core tubes; drill pipes; drive subs; landing rings; transport sleeves; well packers; and parts therefor

'bit':14,18,21,27 'compon':1 'compos':22 'core':16,35 'drill':5,9,11,13,17,20,26,37 'drive':39 'ground':4,8 'individu':24 'land':41 'name':7,15 'overshot':34 'packer':46 'part':2,48 'pipe':38 'reamer':29,30 'rig':12 'ring':42 'run':32 'segment':25,28,31 'sleev':44 'sub':40 'system':6 'therefor':49 'tool':33 'transport':43 'tube':36 'well':45

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