Patents Assigned to R.C.R. Oilfield, Inc.
  • Well tool for use with down-hole drilling apparatus
    Patent number: 5033558
    Abstract: A well tool for use in a down-hole drilling assembly wherein the drill bit is rotated without drill pipe rotation comprising a generally tubular body and a plurality of roller assemblies secured to the body, the roller assemblies including rollers which rotate around axes generally transverse to an axis passing lengthwise through the body of the well tool.
    Type: Grant
    Filed: February 29, 1988
    Date of Patent: July 23, 1991
    Assignee: R.C.R. Oilfield, Inc.
    Inventors: Robert L. Russo, Curley J. Vallot, Jr.