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:
Oct. 22, 2013
Filed:
Mar. 08, 2011
Hyun Woo Jin, Easton, PA (US);
Srinivasan Rajagopalan, Easton, PA (US);
Adnan Ozekcin, Bethlehem, PA (US);
Tabassumul Haque, Annandale, NJ (US);
Mehmet Deniz Ertas, Bethlehem, PA (US);
BO Zhao, Houston, TX (US);
Jeffrey Roberts Bailey, Houston, TX (US);
Terris Field Walker, Cypress, TX (US);
Hyun Woo Jin, Easton, PA (US);
Srinivasan Rajagopalan, Easton, PA (US);
Adnan Ozekcin, Bethlehem, PA (US);
Tabassumul Haque, Annandale, NJ (US);
Mehmet Deniz Ertas, Bethlehem, PA (US);
Bo Zhao, Houston, TX (US);
Jeffrey Roberts Bailey, Houston, TX (US);
Terris Field Walker, Cypress, TX (US);
ExxonMobil Research and Engineering Company, Annandale, NJ (US);
Abstract
Provided are drill stem assemblies with ultra-low friction coatings for subterraneous drilling operations. In one form, the coated drill stem assemblies for subterraneous rotary drilling operations include a body assembly with an exposed outer surface including a drill string coupled to a bottom hole assembly, a coiled tubing coupled to a bottom hole assembly, or a casing string coupled to a bottom hole assembly and an ultra-low friction coating on at least a portion of the exposed outer surface of the body assembly, hardbanding on at least a portion of the exposed outer surface of the body assembly, an ultra-low friction coating on at least a portion of the hardbanding, wherein the ultra-low friction coating comprises one or more ultra-low friction layers, and one or more buttering layers interposed between the hardbanding and the ultra-low friction coating. The coated drill stem assemblies disclosed herein provide for reduced friction, vibration (stick-slip and torsional), abrasion, and wear during straight hole or directional drilling to allow for improved rates of penetration and enable ultra-extended reach drilling with existing top drives.