Oil and gas well downhole equipment and service tools, namely, machines used in temporary well isolation in the nature of well packers, bridge plugs and fracturing plugs to allow for interval well formation treatment, and component parts thereof

'allow':29 'bridg':23 'compon':36 'downhol':5 'equip':6 'format':33 'fractur':26 'gas':3 'interv':31 'isol':16 'machin':11 'name':10 'natur':19 'oil':1 'packer':22 'part':37 'plug':24,27 'servic':8 'temporari':14 'thereof':38 'tool':9 'treatment':34 'use':12 'well':4,15,21,32

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