Patents by Inventor Turlach Paul Boylan

Turlach Paul Boylan 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).

  • Patent number: 5746280
    Abstract: An earth-boring bit has a bit body and at least one cantilevered bearing shaft depending inwardly and downwardly from the bit body. A cutter is mounted for rotation on the bearing shaft and includes a plurality of cutting elements arranged in generally circumferential rows, including inner heel rows, of cutting elements. At least one of the cutting elements in one of the inner rows has a crest at least partially formed of super-hard material that defines a cutting edge and cutting surface for shearing engagement with the bottom of the borehole during drilling operations, the remainder of the cutting end of the element is formed of hard, fracture-tough material for crushing engagement with the bottom of the borehole.
    Type: Grant
    Filed: August 12, 1996
    Date of Patent: May 5, 1998
    Assignee: Baker Hughes Incorporated
    Inventors: Danny E. Scott, Rudolf Carl Otto Pessier, Turlach Paul Boylan