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. 12, 2009
Filed:
Jul. 08, 2004
Jean-michel Gerez, Paris, FR;
Pascal Estrier, Saint-Wandrille-Rançon, FR;
Cédric Monteiro, Anglet, FR;
Jean-Michel Gerez, Paris, FR;
Pascal Estrier, Saint-Wandrille-Rançon, FR;
Cédric Monteiro, Anglet, FR;
Technip France, , FR;
Abstract
The invention relates to a non-bonded pipe which is used to produce a dynamic pressurized fluid transfer hose and, in particular, a mud hose for rotary oil drilling. The inventive pipe consists of the following elements from inside outwards: an inner polymer sheath, at least two crosswise-arranged reinforcing plies comprising a wire which is wound helically at opposing winding angles, A and B, which are close to the angle of equilibrium of 55°, having an average that is centered on a value close to the equilibrium angle value; and an outer polymer sheath. The pipe also comprises an anticreep layer which is made from at least one coil with contiguous edges of a strip with high mechanical properties. Moreover, the aforementioned winding angles, A and B, of the crosswise-arranged reinforcing plies are not equal.