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  • 专利标题:   Cementitious material used in plugging well, comprises Portland cement, sand, biochar, aggregate, graphene, silica fume, fly ash, anhydrous calcium sulfate, carbon nanotubes, carbon fullerene, fibers, anhydrous calcium chloride, sodium chloride, retardant, fuel loss additive, extender.
  • 专利号:   US2023002276-A1
  • 发明人:   DILLARD R W, MITCHELL I
  • 专利权人:   HEROSAND LLC
  • 国际专利分类:   C04B014/02, C04B014/06, C04B014/38, C04B007/02, C04B007/26
  • 专利详细信息:   US2023002276-A1 05 Jan 2023 C04B-007/26 202308 English
  • 申请详细信息:   US2023002276-A1 US856325 01 Jul 2022
  • 优先权号:   US218009P, US856325

▎ 摘　　要

NOVELTY - The cementitious material comprises Portland cement, sand and 12.0-26.0 wt.% biochar. USE - Cementitious material used in plugging a well (claimed). ADVANTAGE - The biochar in cementitious mixtures such as cement, plaster, stucco, and concrete provides improved, ecologically friendly, building materials. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method of plugging a well, which involves pumping a carbon-negative cementitious material into a well.