US 12,459,219 B2
Groove geometry for injection molded polypropylene coated field joints
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); and Marcos Mockel, Magnolia, TX (US)
Assigned to 2543500 ALBERTA LTD., Calgary (CA)
Appl. No. 16/753,834
Filed by SHAWCOR LTD., Toronto (CA)
PCT Filed Oct. 5, 2017, PCT No. PCT/CA2017/051190
§ 371(c)(1), (2) Date Apr. 6, 2020,
PCT Pub. No. WO2019/068163, PCT Pub. Date Apr. 11, 2019.
Prior Publication US 2020/0282677 A1, Sep. 10, 2020
Int. Cl. B29C 70/84 (2006.01); B29C 45/14 (2006.01); F16L 58/10 (2006.01); F17D 5/00 (2006.01)
CPC B29C 70/84 (2013.01) [B29C 45/14311 (2013.01); B29C 45/14622 (2013.01); F16L 58/1054 (2013.01); F17D 5/005 (2013.01); B29C 2045/14319 (2013.01)] 10 Claims
OG exemplary drawing
 
1. An injection molded polypropylene (IMPP) coating for a field joint of an oil or gas pipeline, said IMPP coating having at least two circumferential grooves after the IMPP coating has hardened.