Patents by Inventor Raul E. Lema

Raul E. Lema has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Shirttails for reducing damaging effects of cuttings
    Patent number: 7350600
    Abstract: An earth-boring bit has a bit body that includes head sections, each having depending bit legs with a circumferentially extending outer surface, a leading side, and a trailing side. A bearing shaft depends inwardly from each of the bit legs for mounting a cutter. The bit includes a beveled surface formed at a junction of the leading side and the outer surface of each bit leg. The beveled surface is angled relative to a radial plane emenating from the axis of the bit. The angle of the beveled surface is at least 20 degrees, and extends to an inner surface of the bit leg. The bit can also have a layer of hardfacing on the leading, trailing and shirttail surfaces of the bit leg. A diversion finger of hardfacing extends circumferentially to direct cuttings.
    Type: Grant
    Filed: August 28, 2006
    Date of Patent: April 1, 2008
    Assignee: Baker Hughes Incorporated
    Inventors: Christopher C. Beuershausen, Raul E. Lema, Ronald Hales, Don Q. Nguyen, Gregory L. Ricks, Chih C. Lin, Terry J. Koltermann, Mark E. Morris, Chris M. McCarty, Ronald L. Jones, James L. Overstreet, Rudolf Carl Otto Pessier
  • Shirttails for reducing damaging effects of cuttings
    Patent number: 7182162
    Abstract: An earth-boring bit has a bit body that includes head sections, each having depending bit legs with a circumferentially extending outer surface, a leading side, and a trailing side. A bearing shaft depends inwardly from each of the bit legs for mounting a cutter. The bit includes a beveled surface formed at a junction of the leading side and the outer surface of each bit leg. The beveled surface is angled relative to a radial plane emenating from the axis of the bit. The angle of the beveled surface is at least 20 degrees, and extends to an inner surface of the bit leg. The bit can also have a layer of hardfacing on the leading, trailing and shirttail surfaces of the bit leg. A diversion finger of hardfacing extends circumferentially to direct cuttings.
    Type: Grant
    Filed: July 29, 2004
    Date of Patent: February 27, 2007
    Assignee: Baker Hughes Incorporated
    Inventors: Christopher C. Beuershausen, Raul E. Lema, Ronald Hales, Don Q. Nguyen, Gregory L. Ricks, Chih C. Lin, Terry J. Koltermann, Mark E. Morris, Chris M. McCarty, Ronald L. Jones, James L. Overstreet, Rudolf Carl Otto Pessier
  • Compact for earth boring bit with asymmetrical flanks and shoulders
    Patent number: 7152703
    Abstract: A tungsten carbide compact of an earth boring bit has a cutting tip that is generally chisel-shaped with substantially flat flanks converging to an elongated crest. One of the flanks is smaller and has a greater included angle relative to the axis of the compact than the other flank. Shoulders extend from opposite ends of the crest. One shoulder has a radius of curvature that is smaller than the other shoulder.
    Type: Grant
    Filed: May 27, 2004
    Date of Patent: December 26, 2006
    Assignee: Baker Hughes Incorporated
    Inventors: Matthew J. Meiners, Raul E. Lema, Jimmy W. Eason