公开(公告)号：US11685090B2

公开(公告)日：2023-06-27

申请号：US17510564

申请日：2021-10-26

Applicant: SHAWCOR LTD.

Inventor： Adam Wright ,  Ole Thomas Ustad ,  Magne Skinstad

IPC: B29C45/14 ,  B29L23/00 ,  B29K23/00

CPC classification number: B29C45/14614 ,  B29C45/14336 ,  B29C45/14491 ,  B29C2045/14868 ,  B29K2023/12 ,  B29L2023/22

Abstract: A method of coating a field joint, pipe sections for forming a coated field joint, and a coated field joint formed thereby. First and second angular cut backs are provided in the parent coating of each pipe section. The first angular cut back is at an angle of about 30°+−0.5° relative to the longitudinal axis of the field joint, and the second angular cut back is positioned further from the field joint than the first angular cut back. The first and second angular cut backs result in the parent coating having a stepped profile, a step in the stepped profile between the first and second angular cut backs, the step is substantially parallel to the longitudinal axis of the field joint and is often substantially free of indentations. The field joint coating may be injection moulded to have an upstand that is less than or equal to about 5 mm.

公开(公告)号：US11155013B2

公开(公告)日：2021-10-26

申请号：US15518544

申请日：2015-10-14

Applicant: SHAWCOR LTD.

Inventor： Adam Wright ,  Ole Thomas Ustad ,  Magne Skinstad

IPC: B29C45/14 ,  F16L58/18 ,  F16L13/02 ,  F16L58/10 ,  B29K23/00 ,  B29L23/00

Abstract: A method of coating a field joint, pipe sections for forming a coated field joint, and a coated field joint formed thereby. First and second angular cut backs are provided in the parent coating of each pipe section. The first angular cut back is at an angle of about 30°±5° relative to the longitudinal axis of the field joint, and the second angular cut back is positioned further from the field joint than the first angular cut back. The first and second angular cut backs result in the parent coating having a stepped profile, a step in the stepped profile between the first and second angular cut backs, the is substantially parallel to the longitudinal axis of the field joint and is free of indentations. The field joint coating is injection moulded to have an upstand that is less than or equal to about 5 mm.

公开(公告)号：US20200282677A1

公开(公告)日：2020-09-10

申请号：US16753834

申请日：2017-10-05

Applicant: SHAWCOR LTD.

Inventor： Pablo Wiesemann ,  Roberto Del Callejo Vargas ,  Corentin Lazarus ,  Magne Skinstad ,  Craig Sloan ,  Alexandra Sperber ,  Marcos Mockel

IPC: B29C70/84 ,  F16L58/10 ,  B29C45/14 ,  F17D5/00

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.