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:
Jun. 13, 2013
National Oilwell Varco Denmark I/s, Brondby, DK;
Kristian Glejbol, Glostrup, DK;
NATIONAL OILWELL VARCO DENMARK I/S, Brondby, DK;
Abstract
The invention relates to an unbonded flexible pipe with a length and a longitudinal axis. The pipe comprises an inner sealing sheath defining a bore, a pressure armor layer, an intermediate sealing sheath and a tensile armor. The pressure armor layer comprises at least one elongate metal element arranged with pressure armor gaps and is arranged in an annulus provided between the inner sealing sheath and the intermediate sealing sheath. The tensile armor is arranged on the outer side of the intermediate sealing sheath. Either the intermediate sealing sheath forms a drainage layer or the unbonded flexible pipe further comprises a drainage layer arranged in the annulus. The drainage layer comprises at least one drainage path arranged along the length of the pipe, wherein the drainage path is in fluid communication with the pressure armor gaps. The drainage layer optionally comprises a perforated tube.