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. 04, 2025
Filed:
Oct. 05, 2017
Shawcor Ltd., Toronto, CA;
Pablo Wiesemann, Spring, TX (US);
Roberto Del Callejo Vargas, Katy, TX (US);
Corentin Lazarus, Houston, TX (US);
Magne Skinstad, Fannrem, NO;
Craig Sloan, Houston, TX (US);
Alexandra Sperber, Houston, TX (US);
Marcos Mockel, Magnolia, TX (US);
2543500 ALBERTA LTD., Calgary, CA;
Abstract
In an injection molded polypropylene field joint of an oil or gas pipeline, the three-dimensional geometry of the injection molded/cast coating can have an influence on the stress placed on the line coating during cooling. Specifically, it has been found that molding or casting a coating having circumferential grooves, or other groove geometry, proximal to the interface with the line coating, will reduce line coating failure proximal to the field joint, in particular line coating failure related to the initial spooling/reeling of the pipe.