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:
Nov. 01, 2016
Filed:
Dec. 16, 2013
Applicant:
Varel International Ind., L.p., Carrollton, TX (US);
Inventors:
Charles Daniel Johnson, Porter, TX (US);
Marvin Windsor Amundsen, Houston, TX (US);
Assignee:
VAREL INTERNATIONAL, IND., L.P., Carrollton, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23K 10/00 (2006.01); B23P 15/28 (2006.01); B23P 6/00 (2006.01); E21B 10/46 (2006.01); B23P 25/00 (2006.01); E21B 10/55 (2006.01);
U.S. Cl.
CPC ...
B23P 15/28 (2013.01); B23P 6/00 (2013.01); B23P 25/00 (2013.01); E21B 10/46 (2013.01); E21B 10/55 (2013.01); Y10T 29/49737 (2015.01); Y10T 29/49742 (2015.01);
Abstract
A method for hardfacing a drill bit includes applying a hardfacing material to a matrix metal forming the substrate of the drill bit. The hardfacing material is applied using a plasma arc welding process. A metallurgical bond is formed between the matrix metal and the hardfacing material. The matrix metal may include tungsten carbide and a braze filler metal.