Patents Assigned to Subsurface Technologies Incorporated
  • Rehabilitation of landfill gas recovery wells
    Patent number: 6505681
    Abstract: Gaseous and liquid carbon dioxide (CO2) are applied to a landfill well to penetrate the landfill under rapid pressurization and depressurization repeated in cycles, with or without leachate or fluid in the well. These cycles can be repeated until the CO2 flows more freely down a lower pressure gradient in the well into the landfill surrounding the well screen, creating fissures in the landfill which allow methane and other gases to enter the well, thereby significantly enhancing methane and other landfill gas recovery.
    Type: Grant
    Filed: January 8, 2002
    Date of Patent: January 14, 2003
    Assignee: Subsurface Technologies Incorporated
    Inventors: Steven Catanla, Neil Mansuy