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. 08, 2007
Filed:
Jun. 10, 2003
Michael Payne, Katy, TX (US);
Jackie E. Smith, Houston, TX (US);
Edmond I. Bailey, Houston, TX (US);
Michael Payne, Katy, TX (US);
Jackie E. Smith, Houston, TX (US);
Edmond I. Bailey, Houston, TX (US);
Grant Prideco, L.P., Houston, TX (US);
Abstract
A drill pipecomprises an elongate pipe sectionhaving a substantially uniform pipe outer diameterand a substantially uniform pipe inner diameter. A pin tool jointis welded at one end to the pipe section, and a box tool jointis welded to the other end of the pipe section. Each of the pin and box tool joints includes a thread for mating engagement and preferably first and second shoulders. The drill pipe has a ratio, R, which takes into consideration the pipe inner diameter, P, the pipe outer diameter, P, the tool joint inner diameter, TJ, and the tool joint outer diameter, TJ. This ratio may be expressed as:According to the present invention, this ratio is greater than 8.0, and is preferably from 8.1 to 8.5, thereby providing a drill pipe with desired strength and fluid flow capabilities.