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:
Oct. 04, 2011
Filed:
Nov. 17, 2010
Aaron J. Dick, Houston, TX (US);
Chih Lin, Spring, TX (US);
Terry J. Koltermann, The Woodlands, TX (US);
Anton F. Zahradnik, Sugarland, TX (US);
Daniel E. Scott, Montgomery, TX (US);
Don Q. Nguyen, Houston, TX (US);
Eric Sullivan, Houston, TX (US);
Scott Shiqiang Shu, Spring, TX (US);
Craig Hodges Cooley, Saratoga Springs, UT (US);
Timothy Nathan Sexton, Santaquin, UT (US);
Aaron J. Dick, Houston, TX (US);
Chih Lin, Spring, TX (US);
Terry J. Koltermann, The Woodlands, TX (US);
Anton F. Zahradnik, Sugarland, TX (US);
Daniel E. Scott, Montgomery, TX (US);
Don Q. Nguyen, Houston, TX (US);
Eric Sullivan, Houston, TX (US);
Scott Shiqiang Shu, Spring, TX (US);
Craig Hodges Cooley, Saratoga Springs, UT (US);
Timothy Nathan Sexton, Santaquin, UT (US);
Baker Hughes Incorporated, Houston, TX (US);
Abstract
A rock drilling bit having PDC radial bearings has journal and cone bearing surfaces with increased contact area to increase load support. The radius of curvature of the bearing pin journal and cone bearing surfaces are matched or conformed on the bearing pressure side. The conformal journal surfaces may be formed on the main journal bearing, the pilot pin radial bearing, or both surfaces. In addition, diamond inlays may be located on the bearing surfaces of the cone, the bearing pin, or both components.