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:
Apr. 27, 2010
Filed:
Jun. 11, 2007
Bala Durairajan, Houston, TX (US);
Carl M. Hoffmaster, Houston, TX (US);
Charles H. S. Douglas, Iii, Flint, TX (US);
Dennis Cisneros, Kingwood, TX (US);
Bala Durairajan, Houston, TX (US);
Carl M. Hoffmaster, Houston, TX (US);
Charles H. S. Douglas, III, Flint, TX (US);
Dennis Cisneros, Kingwood, TX (US);
Smith International, Inc., Houston, TX (US);
Abstract
A drill bit for drilling a borehole comprises a bit body having a bit face. In addition, the drill bit comprises a plurality of primary blades. Further, the drill bit comprises a plurality of primary cutter elements mounted to each primary blade and at least one backup cutter element mounted to each primary blade. Still further, the drill bit comprises a plurality of secondary blades. Moreover, the drill bit comprises a plurality of primary cutter elements mounted to each secondary blade. The ratio of the total number of backup cutter elements mounted to the plurality of primary blades to the total number of backup cutter elements mounted to the plurality of secondary blades is greater than 2.0. Each backup cutter element on each primary blade has substantially the same radial position as one of the primary cutter elements on the same primary blade.