Rotating heads for use in oilfield drilling rigs and machines; rotating head machine parts, namely, bearings, bearing adaptor rings, orbit valves, spacer spools, and collars, all of which are for use in oilfield well drilling, namely, for the diversion of gas, water, and other materials and related functions and for improved efficiency of drilling

'adaptor':18 'bear':16,17 'collar':25 'divers':39 'drill':7,35,54 'effici':52 'function':48 'gas':41 'head':2,12 'improv':51 'machin':10,13 'materi':45 'name':15,36 'oilfield':6,33 'orbit':20 'part':14 'relat':47 'rig':8 'ring':19 'rotat':1,11 'spacer':22 'spool':23 'use':4,31 'valv':21 'water':42 'well':34

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