This is all fresh in mind for me as well, as I noticed a little turbidity getting pump into our storage tanks a year ago last fall, which lead me to investigate, and I realized that the footer (check valve) was leaking in the pump. I called the local well drillers, well not so local, as I later found out that they cover the entire state, 500 mile radius. They had drilled the well and installed the original pump thirty odd years ago. They said it was the longest lived pump that they had in their service area.
It was a fiasco on many levels not in the least because they fluffed their original paperwork for our well that they put in. So when they pulled the pump, they had the wrong size pump on the truck. I begged them to come back that same day as rain was in the forecast, but they decided not to. Due to the rain making everything ice like slick, it was a week or ten days before they came back, (yes, no water, other than what we had stored) and they couldn't get their boom truck to the well, because it was still slick, and they don't believe in 4WD trucks. I did ask. So, the new pump and pipe was lowered by hand by a guy standing on my pump house walls. When they got down a hundred feet, I took pity on the guy doing the lowering, and used my tractor as anchor for the safety rope. Then they fluffed the wellhead installation, both on the plumbing side and the electrical side, requiring another trip. I would only recommend their clean up guy. He was good. The rest of them literally had trouble looking in the truck to find a matching size fitting, so yes, it was me rooting around until I found the right fitting. Don't get me started on their mastery of dielectric isolation.
Still, I was impressed at the number of use specific tools in their tool box. I would have needed to buy more than a few of them, and the 30' boom assembly to do the job, and it would have taken me days to do it.
All the best,
Peter