flow regulators for downhole oil field use to control the flow of hydrocarbons and/or water and/or particulates in oil and gas wells

'and/or':14,16 'control':9 'downhol':4 'field':6 'flow':1,11 'gas':21 'hydrocarbon':13 'oil':5,19 'particul':17 'regul':2 'use':7 'water':15 'well':22

oil purifying installations, namely, downhole oil field equipment composed primarily of filters, screens, valves and flow regulators used in oil and gas wells to control the flow of hydrocarbons and/or water and/or particulates in oil and gas wells

'and/or':30,32 'compos':9 'control':25 'downhol':5 'equip':8 'field':7 'filter':12 'flow':16,27 'gas':22,37 'hydrocarbon':29 'instal':3 'name':4 'oil':1,6,20,35 'particul':33 'primarili':10 'purifi':2 'regul':17 'screen':13 'use':18 'valv':14 'water':31 'well':23,38

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