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. 17, 2012
Filed:
Aug. 18, 2009
Narasimha-rao Venkata Bangaru, Pittstown, NJ (US);
Swarupa Soma Bangaru, Legal Representative, Pittstown, NJ (US);
Adnan Ozekcin, Bethlehem, PA (US);
Hyun-woo Jin, Easton, PA (US);
Erika Ann Ooten Biediger, Houston, TX (US);
Jeffrey Roberts Bailey, Houston, TX (US);
Vishwas Gupta, Sugar Land, TX (US);
Mehmet Deniz Ertas, Bethlehem, PA (US);
William Curtis Elks, Jr., The Woodlands, TX (US);
Narasimha-Rao Venkata Bangaru, Pittstown, NJ (US);
Swarupa Soma Bangaru, legal representative, Pittstown, NJ (US);
Adnan Ozekcin, Bethlehem, PA (US);
Hyun-Woo Jin, Easton, PA (US);
Erika Ann Ooten Biediger, Houston, TX (US);
Jeffrey Roberts Bailey, Houston, TX (US);
Vishwas Gupta, Sugar Land, TX (US);
Mehmet Deniz Ertas, Bethlehem, PA (US);
William Curtis Elks, Jr., The Woodlands, 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 or a coiled tubing 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, wherein the coefficient of friction of the ultra-low friction coating is less than or equal to 0.15. 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.