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:
Jul. 16, 2019
Filed:
Nov. 26, 2015
Applicant:
Mitsubishi Materials Corporation, Tokyo, JP;
Inventors:
Assignee:
MITSUBISHI MATERIALS CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 10/56 (2006.01); B25D 17/02 (2006.01); E21B 10/567 (2006.01); E21B 10/36 (2006.01);
U.S. Cl.
CPC ...
E21B 10/56 (2013.01); B25D 17/02 (2013.01); E21B 10/36 (2013.01); E21B 10/567 (2013.01); E21B 10/5673 (2013.01); E21B 2010/561 (2013.01); E21B 2010/566 (2013.01);
Abstract
A drill bit button insert is attached to a button inserts mounted in a drill bit and performs a drilling. The drill bit button insert includes a tip body and an abrasive layer that is formed of a diamond sintered body harder than the tip body and is coated at least at the button insert working surface of the tip body. The abrasive layer has two or more high hardness layers and a low hardness layer having a hardness lower than that of the high hardness layers disposed between the high hardness layers. The high hardness layers and the low hardness layer are provided from the surface side of the abrasive layer toward the tip body side.