Thermally conductive cements and methods for use thereof
AssigneeSchlumberger Technology Corporation
InventorsGeoffrey Landry, William Troy Huey, Ian Corey, Mark Meade, Christopher Parton, Nathan Fischer
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Abstract
Cementing compositions contain water, a cement and an additive for adjusting thermal conductivity. The additive for adjusting thermal conductivity may be graphite, graphene, aluminum oxide, hematite, copper metal, copper oxide, aluminum, amorphous carbon, gallium metal, iron metal, magnesium oxide, nickel metal, nickel oxide, tin metal, tin oxide, zinc metal or zinc oxide, or combinations thereof. Such compositions may have thermal conductivities exceeding 2 W/mK. Such compositions may be useful in closed loop geothermal completions or for encasing electrical cables.
Claims13
A composition, comprising:
- water;
- a portland cement;
- a diutan gum;
- a sodium lignosulfonate retarder;
- and
- a graphite additive for adjusting thermal conductivity of the composition,
- wherein the graphite additive comprises a multimodal particle size distribution comprising a particle size between 50 μm and 470 μm,
- wherein the graphite additive for adjusting thermal conductivity is present in the composition at a concentration between 5% and 30% by weight of the portland cement, and
- wherein the thermal conductivity of the composition is between 5 W/mK and 8 W/mK, a density of the composition is between 10 lbm/gal and 20 lbm/gal, and a solid volume fraction of the composition is between 30% and 50%.
Dependencies are inferred from the claim text.