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. 25, 2008
Filed:
Apr. 29, 2005
Applicants:
George B. Geary, Houston, TX (US);
Eugene J. Mannella, Richmond, TX (US);
Inventors:
George B. Geary, Houston, TX (US);
Eugene J. Mannella, Richmond, TX (US);
Assignee:
GB Tubulars, Inc., Houston, TX (US);
Primary Examiner:
Int. Cl.
CPC ...
F16L 15/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A modified API Buttress threaded casing connection is disclosed for use in drilling oil and gas wells in lieu of using conventional drill pipe. The coupling threads only are multiple tapered yet can be mated with standard API Buttress pin threads having a single taper. The coupling is also shortened to permit abutment of the mating pins at the center of the coupling and can be further enhanced with an integral, sacrificial wear sleeve on one end of the coupling.