IDiyas

For the Inventor, By the Inventor

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.:

US 9580972 B1

PDFFull Text
Date of Patent:
Feb. 28, 2017

Filed:

Jan. 30, 2014

Unbonded flexible armored riser pipe

Applicant:

National Oilwell Varco Denmark I/s, Brondby, DK;

Inventors:

Christian Ditlev Cappeln, Soborg, DK;

Christian Emil Skaaning, Praesto, DK;

Assignee:

NATIONAL OILWELL VARCO DENMARK I/S, Brondby, DK;

Attorney:

Pearne & Gordon LLP

Primary Examiner:

James G Sayre

Int. Cl.
CPC ...
E21B 17/01 (2006.01); F16L 11/08 (2006.01); B32B 15/08 (2006.01); B32B 27/30 (2006.01); B32B 27/32 (2006.01); B32B 27/34 (2006.01); B32B 1/08 (2006.01); B29C 47/00 (2006.01); B29C 47/02 (2006.01); B29C 47/04 (2006.01); B32B 15/18 (2006.01); B32B 3/26 (2006.01); B32B 3/30 (2006.01); B29K 27/00 (2006.01); B29K 27/18 (2006.01);
U.S. Cl.
CPC ...
E21B 17/01 (2013.01); B29C 47/0023 (2013.01); B29C 47/021 (2013.01); B29C 47/04 (2013.01); B32B 1/08 (2013.01); B32B 3/266 (2013.01); B32B 3/30 (2013.01); B32B 15/08 (2013.01); B32B 15/18 (2013.01); B32B 27/304 (2013.01); B32B 27/32 (2013.01); B32B 27/34 (2013.01); F16L 11/082 (2013.01); B29K 2027/16 (2013.01); B29K 2027/18 (2013.01); B32B 2597/00 (2013.01);
Abstract

An unbonded flexible armored pipe for transportation of fluids. The pipe has a center axis and a length and includes a carcass and an innermost sealing sheath with an inner surface surrounding the carcass. The carcass includes at least one elongate armor element wound to surround the center axis with a winding angle to the center axis defining a winding direction and a supporting surface facing towards the inner surface of the innermost sealing sheath and with a supporting surface radius Sr. The supporting surface includes a primary surface area and a plurality of restraining regions in the form of orifices in and/or protuberances and/or indentations from the primary surface area, wherein the restraining regions each have a length determined along the winding direction of the elongate armor element which is up to about Sr times Π.

Find Patent Forward Citations

Loading…