Municipal and PWSD well pumps are the heaviest and typically pump 100-1100 GPM's and are set here between 300-1400' deep. These require a 10T, 12T or our biggest RD-20T rigs to handle the extreme weight of 2", 3", 4", 5", 6" 8" or even 10" diameter steel column pipe.
With either Top drive motor & steel line shaft running inside down to the pump bowl assembly or just submersible column pipe with a huge submersible pump assembly bolted to a huge submersible motor with huge electric submersible cable SS banded to the outside of this pipe all the way to the bottom of the pump assembly.
We use the spinning wrenches to quickly screw it back together and reinstall the repaired pump to FIX YOUR PUMP FAST!!!!