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. 10, 2020
Filed:
Aug. 27, 2014
Applicant:
Sandvik Intellectual Property Ab, Sandviken, SE;
Inventor:
Tomas Sh Jansson, Gavle, SE;
Assignee:
SANDVIK INTELLECTUAL PROPERTY AB, Sandviken, SE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 17/042 (2006.01); E21B 1/00 (2006.01); F16L 15/00 (2006.01);
U.S. Cl.
CPC ...
E21B 17/042 (2013.01); E21B 1/00 (2013.01); E21B 17/0426 (2013.01); F16L 15/00 (2013.01);
Abstract
A drill string rod forms part of a drill string having one end configured with a male spigot portion to be received within a corresponding rod female sleeve end. To minimize stress concentrations within the threaded male and female coupling, the male spigot is configured with a large diameter or cross-sectional area being at least equal to the cross sectional area or diameter of the main length section.