Patents by Inventor Gilbert S. Tyner

Gilbert S. Tyner 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).

  • Core cutting rock bit
    Patent number: 5394952
    Abstract: A roller cone drill bit is disclosed that leaves uncut a substantial formation core having a diameter from 10% to 25% of the bit gage diameter. The bit is designed to have normal size bearings, cone shell thickness and cutter protrusion to allow the use of standard drilling weights and RPM, thereby achieving a significant increase in drilling rate. When drilling abrasive formations, ultra hard cutting teeth are used in the cone apex to maintain the core diameter.
    Type: Grant
    Filed: August 24, 1993
    Date of Patent: March 7, 1995
    Assignee: Smith International, Inc.
    Inventors: Roger P. Johns, Gary Portwood, Gilbert S. Tyner, Charles R. Muren