Grout for earth heat exchange systems
OwnerHoward E. Johnson JR., Ernest E. Carter JR.inventors
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Abstract
A grout for use in a borehole of an earth energy transfer system between the exterior of an earth loop in the borehole and an interior wall of the borehole, the system having an energy transfer fluid moving through the loop for transferring energy with respect to the earth, the grout having, in certain aspects, sand, cement, the cement present in particles, water, and, optionally, cement setting retardant material, bentonite, material creating a repelling electrostatic charge on cement particles for reducing friction of the grout, and/or friction reducing material.
Claims27
A grout for use in a borehole of an earth energy transfer system between the exterior of an earth loop in the borehole and an interior wall of the borehole, the system having an energy transfer fluid moving through the loop for transferring energy with respect to the earth, the grout comprising
- sand,
- cement, the cement present in particles,
- water, and
- material creating a repelling electrostatic charge on cement particles for reducing friction of the grout.
A dry grout blend for use in a borehole of an earth energy transfer system between the exterior of an earth loop in the borehole and an interior wall of the borehole, the system having an energy transfer fluid mooing through the loop for transferring energy with respect to the earth, the grout comprising
- sand,
- Portland cement, and bentonite.
An amount of components for adding to a mixture of sand and cement, the amount comprising
- friction reducing agent,
- cement setting retardant, and
- pumping friction reducer.
A method for making a grout, the method comprising
- mixing sand, cement and an amount of components, the amount of components mixed together prior to the mixing of the sand and cement and the amount of components provided in a container for addition therefrom to the sand and cement, the amount of component comprising friction reducing agent, cement setting retardant, and pumping friction reducer.
Any invention disclosed herein.
Dependencies are inferred from the claim text.