Grouting and Sealing: Protecting Groundwater for Future Generations

To make matters worse, the geothermal heating and cooling systems did not function correctly because the holes lacked the thermally enhanced grout needed to correctly exchange temperature between the loops and the surrounding ground. [...]they were drilling with a high-solids drilling fluid that weighed 11.5 pounds per gallon and they were trying to displace with grout that weighed only 9.5 pounds per gallon. [...]the lighter bentonite grout quickly floated to the surface. [...]THEY WERE DRILLING WITH A HIGH-SOLIDS DRILLING FLUID THAT WEIGHED 11.5 POUNDS PER GALLON AND THEY WERE TRYING TO DISPLACE WITH GROUT THAT WEIGHED ONLY 9.5 POUNDS PER GALLON.