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08-13-11, 07:32 PM | #11 | ||
Supreme EcoRenovator
Join Date: Mar 2009
Location: Portland, OR
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As far as I know, casings are to prevent the sides of the borehole from caving in. If you use drilling mud, it is denser than water and can help form a 'skin' on the walls and help hold the walls back.
Quote:
If you search the 'manifesto' thread, you will find a recipe for "MIX-111" which is an open source borehole grout. I stopped when I hit hard-pan, and didn't drill through multiple aquifers, so I felt that grout was not needed. Also most of the soil I went through was damp to wet sand which had a thermal transfer that was pretty close to MIX-111, so again I decided that grout was not required. Quote:
I think the professional drillers use a grout pump. I have no idea if your rig will be able to handle grout. Your call... By the way, the things we are talking about really don't have so much to do with open loop /closed loop advantages, but would be very interesting to someone who wants to do their own GSHP. I think you ought to either start a thread with a title that reflects what you are doing, or else start posting to the manifesto thread (which gets lots of hits). Your call... -AC_Hacker
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I'm not an HVAC technician. In fact, I'm barely even a hacker... Last edited by AC_Hacker; 08-13-11 at 07:44 PM.. |
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