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:
Nov. 01, 2016
Filed:
May. 08, 2012
Kristian Glejbol, Glostrup, DK;
Kristian Glejbol, Glostrup, DK;
NATIONAL OILWELL VARCO DENMARK I/S, Brondby, DK;
Abstract
The invention relates to a flexible unbonded pipe for sub sea fluid transfer. The pipe comprises an inner sealing sheath defining a bore and a center axis. Inside the inner sealing sheath the pipe comprises a carcass. The pipe further comprises a pair of reinforcement layers consisting essentially of helically wound elongate armoring elements of fiber reinforced polymer material. The elongate armoring elements of the innermost of the pair of reinforcement layers are wound in a first winding direction with an angle α to the center axis, and the elongate armoring elements of the outermost of the pair of reinforcement layers are wound in a second winding direction with an angle β to the center axis, wherein α≧βfπ/2, α is about 65° or less. The pipe preferably comprises an anti-creep layer placed between the inner sealing sheath and the innermost of the pair of reinforcement layers.