Method and apparatus for robotic welding of drill bits

John D. Parrish, Large diameter oil well drilling bit ,(1980)

Robert D. Thomas, Drill bit bearing ,(1979)

Albert E. Highsmith, Rotary rock bit ball plug ,(1986)

Larry W. Rayment, Thomas S. Kilbourn, Method of hard surfacing by plasma torch ,(1976)

Lloyd L. Garner, Rock bit with diamond reamer to maintain gage ,(1977)

Robert H. Slaughter, Scott D. McDonough, Madapusi K. Keshavan, Hardfaced mill tooth rotary cone rock bit ,(1991)

Frank J. Carlin, Tool joint and method of hardfacing same ,(1989)

Michael L. Killian, Jay M. Larson, Sundaram L. Narasimhan, Roger D. Dennis, Homer D. Wireman, Dennis T. Vukovich, Hardsurfacing material for engine components and method for depositing same ,(1991)

Bob Higdon, Method of assembling drill bits and product assembled thereby ,(1987)

Daniel W. Allford, Eric C. Sullivan, Welding torch with dual gas shielding ,(1985)