Oil and gas well equipment, namely, valves not being parts of machines and primarily composed of metal for controlling pressure or fluid flow downhole and for performing downhole multi-zone selective fracturing operations including completion and stimulation operations

'complet':36 'compos':15 'control':19 'downhol':24,28 'equip':5 'flow':23 'fluid':22 'fractur':33 'gas':3 'includ':35 'machin':12 'metal':17 'multi':30 'multi-zon':29 'name':6 'oil':1 'oper':34,39 'part':10 'perform':27 'pressur':20 'primarili':14 'select':32 'stimul':38 'valv':7 'well':4 'zone':31

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