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. 17, 2020
Filed:
Jun. 28, 2012
Applicants:
Jiinjen Albert Sue, The Woodlands, TX (US);
Harold Sreshta, Conroe, TX (US);
Rajagopala Pillai, Pasadena, TX (US);
Inventors:
Jiinjen Albert Sue, The Woodlands, TX (US);
Harold Sreshta, Conroe, TX (US);
Rajagopala Pillai, Pasadena, TX (US);
Assignee:
NATIONAL OILWELL VARCO, L.P., Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C23C 4/06 (2016.01); E21B 4/00 (2006.01); C23C 4/12 (2016.01); E21B 17/00 (2006.01); C23C 30/00 (2006.01); C22C 29/08 (2006.01); B22F 7/04 (2006.01); E21B 4/02 (2006.01); B22F 3/115 (2006.01); B22F 5/00 (2006.01);
U.S. Cl.
CPC ...
E21B 4/003 (2013.01); B22F 3/115 (2013.01); B22F 7/04 (2013.01); C22C 29/08 (2013.01); C23C 4/06 (2013.01); C23C 4/12 (2013.01); C23C 30/00 (2013.01); E21B 4/00 (2013.01); E21B 4/02 (2013.01); E21B 17/00 (2013.01); B22F 2005/001 (2013.01); Y10T 428/12972 (2015.01); Y10T 428/256 (2015.01);
Abstract
A downhole tool comprises a body made of a metal or metal alloy. In addition, the downhole tool comprises a coating disposed on the body. The coating includes at least 75 vol % tungsten carbide having an average grain size less than 1.0 μm. The content of tungsten carbide in the coating with a grain size less than 0.5 μm is between 40 and 64 vol % of the coating.