Patents Assigned to Driltech, Inc.
  • Holding wrench for drill strings
    Patent number: 3980143
    Abstract: Apparatus for holding and supporting a string of connected drill pipe sections which are suspended in a bore hole and for assisting in separating one drill pipe section from the string when the string is being disassembled.
    Type: Grant
    Filed: September 30, 1975
    Date of Patent: September 14, 1976
    Assignee: Driltech, Inc.
    Inventors: Richard H. Swartz, Richard J. Pearce, James M. Bowe
  • Well drilling vehicle
    Patent number: D244190
    Type: Grant
    Filed: September 2, 1975
    Date of Patent: May 3, 1977
    Assignee: Driltech, Inc.
    Inventors: Richard H. Swartz, Richard J. Pearce, James M. Bowe