I should have been clearer about my question, since I was assuming Egon was talking about sinking a well with a small diameter pipe, which he kindly cleared up for me with his post. Your link, Brad, shows a submersible pump with a 4" diameter, easily fitting into typical "big-rig" drilled well with a typical 6" casing.
Fortunately, the old well doesn't take on any sewage, but acts more like a dry well for draining the excess rain runoff from the yard.
So here's what I'm really interested in learning, and hadn't clearly seen yet in all of my "googling;" is it possible to go down, say, 100 feet with one of the simpler methods described here on this thread AND end up with a casing large enough for a submersible pump? For most of what I've seen for a do-it-yourselfer like me, I have assumed (and we all can now see how well that's worked out for me, eh?) is that I'd end up with a smaller diameter casing/pipe that precluded an electricity driven submersible pump. Actually, I say do-it-yourself pretty casually; I'll most likely have a few of my regular laborers (well-paid at the equivalent of $2.50/day) doing all of the heavy, labor-intensive work, but still avoid a costly drill rig I hope!
Egon, your method seems to me to be the only one that can give a casing large enough for a submersible pump at the depth needed for situations like mine, then. All I gotta do is study that sketch you posted a leeetle bit harder... any chances you could enhance it some? Thanks.
A packer assembly will use the outside pipe and a drop pipe in the center to a packing assembly. Works like a two pipe jet system.
Illegal in some if not most states.