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. 21, 2015
Filed:
Mar. 06, 2012
Ghazi J. Hashem, Seabrook, TX (US);
David Brunnert, Cypress, TX (US);
John W. Kochera, Conroe, TX (US);
Mark Mitchell, Pearland, TX (US);
Melissa A. Frilot, Houston, TX (US);
Thomas M. Redlinger, Houston, TX (US);
Ghazi J. Hashem, Seabrook, TX (US);
David Brunnert, Cypress, TX (US);
John W. Kochera, Conroe, TX (US);
Mark Mitchell, Pearland, TX (US);
Melissa A. Frilot, Houston, TX (US);
Thomas M. Redlinger, Houston, TX (US);
Weatherford Technology Holdings, LLC, Houston, TX (US);
Abstract
The present invention embodies a drill pipe in which various damaged sections of the pipe are repaired in order to maintain or improve the wear and buckle resistance of the drill pipe. The sections are strengthened using various hardening methods such as heat treatment processes and/or expansion techniques. A sleeve can also be applied to the strengthened portions. Surface enhancers, such as hardbanding, can be applied to the strengthened portions or the sleeve in order to provide abrasion resistance or to reduce friction.