Patents Assigned to Subsurface Technologies
  • Rehabilitation of landfill gas recovery wells
    Patent number: 6338386
    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: May 11, 2000
    Date of Patent: January 15, 2002
    Assignee: Subsurface Technologies
    Inventors: Steven Catania, Neil Mansuy