
03/11/08, 07:52 PM
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Join Date: Jan 2004
Location: WI
Posts: 2,180
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We had a Deep Rock back in the 1970s, used it for our well and drilled through over 20 feet of limestone. A friend used it for two more, then after a few years we sold it. Wish we still had it, though. I knew a fellow that drilled through almost 200 feet of rock with his. He would drill a few feet every weekend, then fix up his bits during the week for the next round of weekend drilling. I would agree with most of the comments so far from people who have used them successfully. Be sure to learn what to do to seal around your casing when you are done, and do it properly, so you don't contaminate your aquifer.
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