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. 03, 2002
Filed:
May. 14, 2001
Christopher C. Beuershausen, Lafayette, LA (US);
Mark W. Dykstra, Kingwood, TX (US);
Roger Fincher, Conroe, TX (US);
Roland Illerhaus, The Woodlands, TX (US);
Steve R. Matson, Spring, TX (US);
James A. Norris, Sandy, UT (US);
Michael P. Ohanian, Slidell, LA (US);
Rudolf C. O. Pessier, Houston, TX (US);
Baker Hughes Incorporated, Houston, TX (US);
Abstract
A PDC-equipped rotary drag bit especially suitable for directional drilling. Cutter chamfer size and backrake angle, as well as cutter backrake, may be varied along the bit profile between the center of the bit and the gage to provide a less aggressive center and more aggressive outer region on the bit face, to enhance stability while maintaining side cutting capability, as well as providing a high rate of penetration under relatively high weight on bit.