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:
Aug. 17, 2010
Filed:
Dec. 12, 2006
James L. Duggan, Friendswood, TX (US);
Redd H. Smith, The Woodlands, TX (US);
James L. Duggan, Friendswood, TX (US);
Redd H. Smith, The Woodlands, TX (US);
Baker Hughes Incorporated, Houston, TX (US);
Abstract
Earth-boring rotary drill bits including a bit body attached to a shank. In some embodiments, the bit body and the shank may have abutting surfaces concentric to an interface axis offset relative to a longitudinal axis of the drill bit. In additional embodiments, the bit body and the shank may have generally frustoconical abutting surfaces. Methods for attaching a shank and a bit body of an earth-boring rotary drill bit include abutting a surface of a shank against a surface of a bit body, and causing the abutting surfaces to be concentric to an axis that is offset or shifted relative to a longitudinal axis of the drill bit.