A wire that runs from a drill rig down into the drill hole to support a deadload or other downhole tool(noun)
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Use "wireline" in a sentence
"HD finally gives customers of AT&T and other telcos a reason to retain wireline connections, for while the somewhat better voice quality associated with wireline already provides some resistance to cord-cutting, HD yields wireline telephone calls that sound dramatically better."
"Mobile dominates the future plans of both telcos and cablecos, for the telcos view the year-over-year declines in wireline experienced since 2000 as permanent, and the cablecos are offering their digital phone plans to the same shrinking pool of customers."
"(Whether they can actually save wireline is far from certain, though.)"