The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 02, 2009
Filed:
Jun. 27, 2006
Lance T. Richman, Ponca City, OK (US);
Lance T. Richman, Ponca City, OK (US);
Smith International, Inc., Houston, TX (US);
Abstract
A drill bit having a bit body, at least one roller cone attached to the bit body and able to rotate with respect to the bit body, and a plurality of cutting elements disposed on the at least one roller cone is disclosed. At least one of the plurality of cutting elements includes a first area defining a trailing edge, a second area proximate the first area defining a main wear surface, and a third area proximate the second area and defining a leading edge relief zone. Further, an insert for a drill bit having a contact portion adapted to contact an earth formation, the contact portion including a first area defining a relieved trailing edge, a second area defining a main wear surface, and a third area proximate the second area and defining a leading edge relief zone.