Well cross-section before plugging
Plugged well cross-section drawing
To see a cross section of a producing well, and how a well is drilled, cased and cemented in the first place, go to “How a Gas Well is Drilled Down into the Ground, and What Can go Wrong“
Monuments the driller is supposed to leave after the well is plugged
If there is more there than this pipe, the well is not plugged, it is just “shut in” or maybe even still producing.