US 11,794,418 B2
Apparatus and method for threaded-welded reinforced thermosetting resin pipe joints
Abderrazak Traidia, Lussan (FR); Abdullah Al Shahrani, Dammam (SA); Waleed Al Nasser, Ad Dammam (SA); Chris Worrall, Cambridge (GB); and Farshad Salamat-Zadeh, Cambridge (GB)
Assigned to SAUDI ARABIAN OIL COMPANY, Dhahran (SA); and SAUDI ARAMCO TECHNOLOGIES COMPANY, Dhahran (SA)
Filed by SAUDI ARABIAN OIL COMPANY, Dhahran (SA)
Filed on Jul. 20, 2021, as Appl. No. 17/380,748.
Claims priority of provisional application 63/053,926, filed on Jul. 20, 2020.
Prior Publication US 2022/0016851 A1, Jan. 20, 2022
Int. Cl. B29C 65/36 (2006.01); B29C 65/34 (2006.01); B29C 65/00 (2006.01); F16L 47/02 (2006.01); F16L 47/16 (2006.01); B29K 105/06 (2006.01); B29L 23/00 (2006.01)
CPC B29C 65/3696 (2013.01) [B29C 65/3452 (2013.01); B29C 66/1122 (2013.01); B29C 66/5221 (2013.01); B29C 66/71 (2013.01); B29C 66/73921 (2013.01); F16L 47/02 (2013.01); F16L 47/16 (2013.01); B29K 2105/06 (2013.01); B29L 2023/22 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A system for coupling pipes comprising:
a first pipe having a tapered, spigot end;
a second pipe having a tapered, spigot end;
wherein the first pipe and the second pipe are made from a reinforced thermosetting resin (RTR), and
a one-piece coupler having two tapered socket ends adapted to internally receive the respective tapered, spigot ends of the first pipe and the second pipe, wherein the tapered, spigot ends of the first pipe and the second pipe are spaced apart from each other after being internally received by the coupler,
wherein a thermoplastic material is disposed between an exterior of the first pipe and an interior of the coupler,
wherein a thermoplastic material is disposed between an exterior of the second pipe and the interior of the coupler,
wherein, upon application of induction heating to the coupler, the heat between the first pipe, the second pipe, and the coupler is sufficient to melt the thermoplastic material such that, when the heat is removed, the hardened thermoplastic material seals the first pipe and the second pipe to the coupler.