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:
Sep. 05, 2006
Filed:
Apr. 04, 2003
George B. Witman, Sugar Land, TX (US);
Peter Wilson, Norman, OK (US);
Scott D. Mcdonough, Houston, TX (US);
Michael A. Siracki, The Woodlands, TX (US);
George B. Witman, Sugar Land, TX (US);
Peter Wilson, Norman, OK (US);
Scott D. McDonough, Houston, TX (US);
Michael A. Siracki, The Woodlands, TX (US);
Smith International, Inc., Houston, TX (US);
Abstract
A roller cone drill bit is disclosed which includes a bit body adapted to be coupled to a drill string. A bearing journal depends from the bit body. A single roller cone is rotatably attached to the bearing journal. The roller cone has a plurality of inserts disposed at selected positions about the cone. The journal defines a rotation angle with respect to an axis of rotation of the bit such that the roller cone includes a wall contact zone and a bottom contact zone. At least one of the inserts disposed in the wall contact zone has an extension portion terminating in a substantially planar upper surface.