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:
Feb. 05, 2013
Filed:
Sep. 18, 2007
Xavier Rocher, Chatou, FR;
Xavier Rocher, Chatou, FR;
Saipem S.A., Montigny le Bretonneux, FR;
Abstract
A method of making steel undersea pipes designed to convey corrosive fluids including water, the method including acting in a workshop on land to assemble together respective ends of at least two unitary pipe elements with carbon-steel first welds to form pipe strings, the first welds being protected by first linings, and acting at sea from a laying ship to assemble together respective ends of the strings by use of anti-corrosion second welds of stainless steel or of anti-corrosion alloy to form a pipe. Each of the ends of the strings are provided with an anti-corrosion cladding which extends over the inside surface made of carbon steel of each end unitary pipe element over a first length of at least 4 times the thickness of the wall of the pipe.