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:
Jan. 23, 2001
Filed:
Aug. 05, 1998
Gary Ray Portwood, Kingwood, TX (US);
J. Albert Sue, The Woodlands, TX (US);
Smith International, Inc., Houston, TX (US);
Abstract
A drill bit for cutting a formation that tends to form ridges comprises: a bit body having a bit axis, a plurality of rolling cone cutters rotatably mounted on the bit body, with each rolling cone cutter having a generally conical surface, a plurality of primary cutter elements extending from one of the cone cutters in a first row, each primary cutter element having an outer side and an inner side, and a plurality of ridge-cutting cutter elements extending from the same cone cutter, the first plurality of ridge-cutting cutter elements being positioned adjacent to the outer side of the first row of primary cutter elements. Each ridge-cutting cutter can be, but is not necessarily, on the same cone cutter as the primary cutter element adjacent to which it cuts, and is preferably positioned on a land or flat adjacent to that primary cutter element. Each primary cutter element in one or more rows can be provided with a ridge-cutting cutter element and the ridge-cutting cutter element can be angled with respect to the axis of the primary cutter element.