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:
May. 26, 2015
Filed:
Mar. 17, 2008
Inger-margrete Procida, Hellerup, DK;
Inger-Margrete Procida, Hellerup, DK;
NATIONAL OILWELL VARCO DENMARK I/S, Brondby, DK;
Abstract
The invention relates to a flexible pipe comprising at least one polymer layer, and at least one armoring layer unbounded to said polymer layer, wherein at least one polymer layer is a cationic clay containing polymer layer of a polymer material comprising a polymer matrix and from about 0.1 to about 5% by weight of at least one cationic clay silicate. Preferred cationic clay silicates comprise kaolinite; smectite; Illite; chlorite; and synthetic cationic clays. The cationic clay silicate may e.g. be an organo-cationic clay. The cationic clay silicate may preferably be exfoliated and/or intercalated in the polymer matrix. The polymer layer may preferably comprise an inner liner, a thermally insulating layer, an anti-wear layer and/or an outer sheath or a sub-layer thereof.