On Jul 16, 7:23*pm, "ppp" wrote:
I have a 4" steel well casing, the top 5' of the casing is
so encrusted with rust scale that
I can't get the pump out. I have tried chipping out the
scale but can't get it all.
How would a well repairman get it out?
I have a backhoe and I'm thinking of digging down as deep as
I can and cutting off
the casing. Then put a piece of 5" plastic well pipe in with
a rubber coupling to fix it.
Has anyone ever tried this?

The top part will have to be replaced as you need to get your new/
repaired pump in as well as the old old one out.. Your plan sounds
good to me.
I did see a descaling device once that was just a ridgid steel rod
with a piece of chain on the end. It was spun at a fair speed, the
chain thrashing about hit the rust off. It was a homemade device.