If you have perforated casing and the formation no longer produces enough, you must seal the open perforation with cement before you drill down to the next aquifer.
The grout serves as an integral part of a properly functioning heat loop system, and also creates a low-permeable seal through the length of the borehole. Follow these steps to ensure a good sample of grout for thermal conductivity testing.
Drillers have a special talent for grabbing what’s on hand and innovating to get the job done. Such is the case with Hefty Drilling in Anchorage, Alaska.
We spend a lot of time in this space doling out advice on how contractors can do their jobs better. Now I want to flip the script and hear from readers: What advice do you have for us?