Patents Assigned to Vallourec Drilling Products USA, Inc.
  • Shale drill pipe
    Patent number: 9222314
    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?.
    Type: Grant
    Filed: January 28, 2013
    Date of Patent: December 29, 2015
    Assignee: Vallourec Drilling Products USA, Inc.
    Inventors: Mazhar Mahmood, Marta Lafuente, Scott Granger