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:
Nov. 27, 2012
Filed:
Apr. 30, 2010
Giampaolo Ferrari, Santo Stefano di Magra, IT;
Gary Portwood, Florence, IT;
Carl A. Deen, Choctaw, OK (US);
Giampaolo Ferrari, Santo Stefano di Magra, IT;
Gary Portwood, Florence, IT;
Carl A. Deen, Choctaw, OK (US);
Smith International, Inc., Houston, TX (US);
Abstract
A rolling cone drill bit comprises a bit body and a plurality of rolling cone cutters mounted on the bit body. Each cone cutter includes a plurality of gage cutting elements. Each gage cutting element has a cutting portion extending from a base portion to an extension height. Further, each gage cutting element contacts a gage curve at a gage curve contact point in a composite rotated profile view. Each gage cutting element has a cross-sectional area Ain a first offset reference plane parallel to a base reference plane and offset from the base reference plane by an offset distance dequal to 10% of the extension height. The ratio of Ato a cross-sectional area Aof the base portion of each gage cutting element is less than 11%.