If he put a 2" pipe in, then it's most likely to be considered a "shallow well" and will use a pump that is mounted above ground level.
If it was a 4" pipe, then what is called a submersible pump can be used.
I don't know about shallow wells, but a 4" submersible pump can pump up to 100 gpm. The size and style of pump will be determined by the amount of water that is available and the "head", which is the distance that the water is below the ground level without any pumping going on, i.e. static level.
For instance, my 4" well is 66' deep. The water head is 13'. I have a 3/4 hp submersible well pump that is pumping 27 gpm. I can upgrade the pump to pump up to 100 gpm if I want.
My electric going to the well is 220v. That also has some determining factor on which pump you use.
