oil and gas drilling apparatus; namely, drill collars, integral blade stabilizers, stabilizer mandrels, measurements-while-drilling housings, logging-while drilling housings, non-magnetic drill collars, integral blade non-magnetic stabilizers, non-magnetic flex collars, and parts and fittings for all the aforesaid goods

'aforesaid':47 'apparatus':5 'blade':10,30 'collar':8,28,39 'drill':4,7,17,22,27 'fit':43 'flex':38 'gas':3 'good':48 'hous':18,23 'integr':9,29 'log':20 'logging-whil':19 'magnet':26,33,37 'mandrel':13 'measur':15 'measurements-while-dril':14 'name':6 'non':25,32,36 'non-magnet':24,31,35 'oil':1 'part':41 'stabil':11,12,34

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