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. 02, 2010
Filed:
Aug. 14, 2008
Alan J. Massey, Houston, TX (US);
David K. Luce, Splendora, TX (US);
Eric Sullivan, Houston, TX (US);
John F. Bradford, Iii, Fort Worth, TX (US);
Carmel Z. El Hakam, Houston, TX (US);
James L. Overstreet, Tomball, TX (US);
Ajay V. Kulkarni, The Woodlands, TX (US);
Alan J. Massey, Houston, TX (US);
David K. Luce, Splendora, TX (US);
Eric Sullivan, Houston, TX (US);
John F. Bradford, III, Fort Worth, TX (US);
Carmel Z. El Hakam, Houston, TX (US);
James L. Overstreet, Tomball, TX (US);
Ajay V. Kulkarni, The Woodlands, TX (US);
Baker Hughes Incorporated, Houston, TX (US);
Abstract
An earth boring bit has a steel body having at least one leg with a depending bearing pin. A cone having cutting elements is rotatably mounted to the bearing pin. A ball plug weld is on the outer surface of the leg. A layer of hardfacing applied to part of the outer surface of the leg, the hardfacing having carbide particles in a matrix. A corrosion resistant coating containing at least 50% nickel is formed on parts of the outer surface of the leg that are free of the layer of hardfacing both above and below the ball plug weld.