Not if it's white pvc pipe.

Why not? All of our well casings are PVC around here . It is probably
4" tho unless it is a shallow well.

I'm not a well-drilling pro, but IMNSHO,
somebody "around here" is doing it wrong. The exposed part
of the well-casing should be made of something than can take a
stout blow without shattering. Steel by preference, but I'd
be willing to accept ABS with UV blockers.

Are you sure that the wells aren't terminating below-ground,
and that pipe isn't just a marker?
--Goedjn

*IMNSHO = In my not so humble opinion