Quote:
Originally Posted by braebyrn
I spent some time today speaking to a well driller and reseller of drilling equipment. He is familiar with my unit and suggested that I go to the geology department at the local university. They will know the lay of the land as far as the soil conditions in my area.
He said the problem that I am having is that the drag bit (pictured in a few posts back) will little to no effect on the football size rocks that are in the borehole. He mentioned that I am drilling in unconsolidated formations (A sediment that is loosely arranged or unstratified (not in layers) or whose particles are not cemented together (soft rock); occurring either at the ground surface or at a depth below the surface).
He said that it will bounce the drilling rig and cause early wear and possible breakage. He suggested that I look for a hardened Tri cone bit.
|
This all sounds like knowledgeable advice.
I searched through ebay and found quote a few tricone bits,
here's the smallest one I saw:
Looks like it has a very tapered thread, so you'll need to come up with an adapter of some kind. I bet the drilling equipment guy knows just what you need.
Looks like
herlichka's advice could hardly be more timely.
-AC_Hacker