[aerohead]

For the conditions and numbers given by those 'talking' about the orphaned oil wells in the USA, I came up with these back-of-the-envelope values:
* 33,931,935,020- linear feet of buried steel
* 6,426,502-miles
* 26 trips from Earth to the Moon
* 705,805,145-cubic-feet
* 213,762,762-short tons
* Equivalent to a solid cube of steel, two NFL football fields on a side, and two football fields tall..
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By oilpan4's numbers ( Alice Friedemann ? ), this amount of steel would provide enough rebar for 4,750,283, 2-MW wind turbines.
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I only calculated for underground steel. Prime movers, gear reducers, pumping units, counter weights, flow line, storage tanks, water separators, etc., while present at some wells, are not included; nor conductor casing, surface casing, or intermediate casing.