Patents Assigned to New Jersey Drilling Co., Inc.
  • Method of an apparatus for gaining access to an underground chamber
    Patent number: 4254994
    Abstract: Method and apparatus for gaining access to an underground chamber is disclosed to utilize a pressurized pipe casing which defines a conduit for introducing compressed air to a drill, which drill is utilized to bore a rescue hole to an area of entrapped miners. Thereafter, access is gained to the area of entrapment and the drill pipe is utilized as casing defining a rescue shaft for providing ingress of rescue personnel and egress of entrapped miners.
    Type: Grant
    Filed: June 8, 1978
    Date of Patent: March 10, 1981
    Assignee: New Jersey Drilling Co., Inc.
    Inventor: Donald J. McBride