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Yes this is normal even in normal residential wells. Boreholes are just a few inches across so obviously nobody ever goes down them! I have an injector pump t

Yes this is normal even in normal residential wells. Boreholes are just a few inches across so obviously nobody ever goes down them! I have an injector pump that sits at the top of the borehole and has a pipe that pushes water down to pump water up through a second pipe, but it's more common to have a submersible pump down at the bottom of the bore.

JoeAltmaier 2y ago
I've wondered how well the inject-pump style works! Do you have experiences to relate? All the electronics are up top where you can get at them. Has the mechanism at the bottom ever needed to be serviced? Can it be retrieved easily?
- bluGill 2y ago
  You can pull the parts out of the hole anytime you want to - special equipment is normally used, but a rope and a tripod to hold a pulley over the hole works (might not be safe). What is at the bottom of the hole is a "injector" which is basically a U shaped pipe and a small jet to push water back up. If the well water is only 25 feet below the ground a pump at the top along works. This jet system gets down to 60 feet. The pump down the hole gets to 600 feet (check the pump specs - many are rated to only 250). After that you need oil well type pumps where the motor is at the top of the hole but the pump is lowered down.
  - willvarfar 2y ago
    (I can't find any English lit on it, but my Grundfos Ejektorpump (had to go out and look at it to see what it's called; perhaps the correct translation is ejector pump rather than injector pump?) is in a 85m deep borehole and works great. It's 40 years old, heavily used and never serviced and quite a puzzle how it's still going. I have no idea if they can pump from deeper than that)
    - JoeAltmaier 2y ago
      Some designs might have no moving parts down there? Nothing to go wrong.
      - willvarfar 2y ago
        You made me more curious to find out about it. https://www.vvsbutiken.nu/product.html/ejektorer-grundfos?category_id=1484 https://www.vvsbutiken.nu/product.html/ejektorer-grundfos?ca... Two normal plastic water pipes descend down to the bottom of the borehole. At the bottom is a brass u-shaped fitting with a inlet with a non-return valve.

JoeAltmaier 2y ago

I've wondered how well the inject-pump style works! Do you have experiences to relate? All the electronics are up top where you can get at them. Has the mechanism at the bottom ever needed to be serviced? Can it be retrieved easily?

bluGill 2y ago
You can pull the parts out of the hole anytime you want to - special equipment is normally used, but a rope and a tripod to hold a pulley over the hole works (might not be safe). What is at the bottom of the hole is a "injector" which is basically a U shaped pipe and a small jet to push water back up. If the well water is only 25 feet below the ground a pump at the top along works. This jet system gets down to 60 feet. The pump down the hole gets to 600 feet (check the pump specs - many are rated to only 250). After that you need oil well type pumps where the motor is at the top of the hole but the pump is lowered down.
- willvarfar 2y ago
  (I can't find any English lit on it, but my Grundfos Ejektorpump (had to go out and look at it to see what it's called; perhaps the correct translation is ejector pump rather than injector pump?) is in a 85m deep borehole and works great. It's 40 years old, heavily used and never serviced and quite a puzzle how it's still going. I have no idea if they can pump from deeper than that)
  - JoeAltmaier 2y ago
    Some designs might have no moving parts down there? Nothing to go wrong.
    - willvarfar 2y ago
      You made me more curious to find out about it. https://www.vvsbutiken.nu/product.html/ejektorer-grundfos?category_id=1484 https://www.vvsbutiken.nu/product.html/ejektorer-grundfos?ca... Two normal plastic water pipes descend down to the bottom of the borehole. At the bottom is a brass u-shaped fitting with a inlet with a non-return valve.