Well, ground wire is out of the way and it's still stuck. Looks like it's time to just pull really hard and hope for the best. I'm out of ideas otherwise.
I have a 4400 lb breaking strength rope. Plan is to get it tied with an icicle hitch at the bottom of the drop pipe, right around where it meets the pump.
Anything I should be concerned about here? I figure either the pump comes out, or the drop pipe breaks. If the latter, I'll try to push the pump down to the bottom of the well, but even if it stays stuck in its current position, the water level is high enough for a new pump on top.
Only worry I have is the pump getting even more stuck partway up. I don't think that's very likely though. Is casing damage a concern?
One last thought is to first lower the pump as far as it will go, with the hope that the casing would be open at the bottom and the borehole would continue, with a larger diameter that would allow whatever is causing the jam to fall down. I think this is unlikely based on my location (Maryland). The county well records from when this well was drilled were lost unfortunately, so I can't say for sure. The only thing I can say with some confidence is that the water comes into the casing from below the pump.
It might be worth dropping the pump down first regardless of the well construction though, since if it is going to get stuck and the drop pipe break, it would be nice if it were further down. Although, if casing damage is a concern, I imagine the screen would be more fragile.