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:
Jan. 25, 2011
Filed:
Dec. 17, 2009
Douglas Paul Fairchild, Sugar Land, TX (US);
Steven Jeffrey Ford, Missouri City, TX (US);
Amit Kumar, Houston, TX (US);
Nathan Eugene Nissley, Houston, TX (US);
Nicholas E. Biery, Westerville, OH (US);
Mario L. Macia, Bellaire, TX (US);
Douglas Paul Fairchild, Sugar Land, TX (US);
Steven Jeffrey Ford, Missouri City, TX (US);
Amit Kumar, Houston, TX (US);
Nathan Eugene Nissley, Houston, TX (US);
Nicholas E. Biery, Westerville, OH (US);
Mario L. Macia, Bellaire, TX (US);
ExxonMobil Research and Engineering Company, Annandale, NJ (US);
Abstract
Provided are butt welds and methods of making such butt welds using a combination of fusion root welding and friction stir welding to yield welds with decreased propensity for dropout during friction stir welding without the need for a back-up support plate. In one form of the present disclosure, the butt weld includes: two or more abutting structural steel components beveled on faying surfaces on one side of the components to form a suitably shaped fusion root weld groove and unbeveled on faying surfaces on the opposite side of the components and interconnected with a first fusion root weld on the beveled side of the components and a second friction stir weld on the unbeveled side of the components, wherein the first fusion root weld has a width ranging from 7 mm to 30 mm, a penetration depth ranging from 2 mm to 20 mm, and an overfill ranging from 2 mm to 5 mm, and wherein the stir zone of the second friction stir weld penetrates the first fusion root weld. The butt welds and methods of making find application in joining linepipe for oil and gas production.