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, 2020
Filed:
Jul. 01, 2016
Shell Oil Company, Houston, TX (US);
Daniele Di Crescenzo, New Orleans, LA (US);
Mark Michael Shuster, Voorburg, NL;
Djurre Hans Zijsling, Rijswijk, NL;
Rob Bosman, Enschede, NL;
SHELL OIL COMPANY, Houston, TX (US);
Abstract
A tubular member () with a relative rough (1.5-10 μm) inner surface () coated solid lubricating film () which is transformed into a substantially viscous rubbery viscoelasto-plastic phase at temperatures in a range between 50° C. and 110° C. is expanded by moving an expansion member () with a relatively smooth outer surface (roughness<1.5 μm) therethrough, such that during expansion a viscous viscoelastoplastic substantially rubbery lubricating film () is generated between the tubular member () and the expansion mandrel (), which film remains bonded to the rough inner surface () of the expanded tubular (), but does not stick to the relatively hot and smooth expansion member ().