Equipment for use in the construction of subterranean oil and gas wells comprised of drill pipe, casing strings and liner strings for oil and gas wells and a liner pipe with an insulated electrical conductor which provides electric power and communication channel, each type of pipe and the electrical conductor all sold together as a unit

'case':17 'channel':42 'communic':41 'compris':13 'conductor':35,50 'construct':6 'drill':15 'electr':34,38,49 'equip':1 'gas':11,25 'insul':33 'liner':20,29 'oil':9,23 'pipe':16,30,46 'power':39 'provid':37 'sold':52 'string':18,21 'subterranean':8 'togeth':53 'type':44 'unit':56 'use':3 'well':12,26

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