Metal couplings for use with oil, gas, geothermal, and utility drill pipes as a joint connector; thread protectors for drill pipes; gage blocks of Height and Lead setting standards; thread profile gage template; master and working ring and plug gages, and thread form overlay

'block':23 'connector':16 'coupl':2 'drill':11,20 'form':43 'gage':22,32,40 'gas':7 'geotherm':8 'height':25 'joint':15 'lead':27 'master':34 'metal':1 'oil':6 'overlay':44 'pipe':12,21 'plug':39 'profil':31 'protector':18 'ring':37 'set':28 'standard':29 'templat':33 'thread':17,30,42 'use':4 'util':10 'work':36

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