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:
Mar. 22, 2016
Filed:
Nov. 14, 2012
Applicant:
Smith International, Inc., Houston, TX (US);
Inventors:
Youhe Zhang, Spring, TX (US);
Yuelin Shen, Spring, TX (US);
Yuri Burhan, Spring, TX (US);
Kjell Haugvaldstad, Vanvikan, NO;
Assignee:
Smith International, Inc., Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 10/627 (2006.01); E21B 10/50 (2006.01); E21B 10/08 (2006.01); E21B 10/62 (2006.01); E21B 10/633 (2006.01); E21B 10/55 (2006.01);
U.S. Cl.
CPC ...
E21B 10/50 (2013.01); E21B 10/08 (2013.01); E21B 10/55 (2013.01); E21B 10/62 (2013.01); E21B 10/627 (2013.01); E21B 10/633 (2013.01);
Abstract
A cutting structure may include an outer support element; and an inner rotatable cutting element comprising a cutting surface at its upper end; wherein the inner rotatable cutting element comprises at least one line contact along a circumferential side surface thereof and/or at least one point contact at a bottom face thereof.