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:
Dec. 29, 2015
Filed:
Jan. 28, 2013
Applicant:
Vallourec Drilling Products Usa, Inc., Houston, TX (US);
Inventors:
Mazhar Mahmood, Houston, TX (US);
Marta Lafuente, Houston, TX (US);
Scott Granger, Houston, TX (US);
Assignee:
Vallourec Drilling Products USA, Inc., Houston, TX (US);
Primary Examiner:
Int. Cl.
CPC ...
F16L 9/00 (2006.01); E21B 17/042 (2006.01); E21B 17/00 (2006.01);
U.S. Cl.
CPC ...
E21B 17/042 (2013.01); E21B 17/00 (2013.01); Y10T 29/49826 (2015.01);
Abstract
A drill pipe for oil and gas drilling comprises two tool joints and a main portion between the tool joints, with two upsets adjacent to the tool joints, and a central section between the upsets. The outer diameter of the central section of the main portion is less than the outer diameter of the main portion upsets, and the outer diameter of the central section of the main portion is between 4″ and 4½″.