Threaded pipe connection

F - Mech Eng,Light,Heat,Weapons – 16 – L

Patent

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Details

F16L 15/06 (2006.01) F16L 15/00 (2006.01)

Patent

CA 2502724

A coupled version of a threaded connection (10) includes first threads (16, 38) and second threads, (20, 34) on both elongate tubulars (14, 30) and a coupling (45). An integral joint version (50) preferably includes a first and second tapered threads (58, 60) on each of the connected tubular bodies (54, 56). The coupling preferably includes a dope entrapment cavity in one of the connected tubulars between the first and second threads. A tapered metal seal surface is provided preferably between the first and second threads. The second thread in a preferred embodiment is a hook thread with a negative rake angle. In another embodiment, the pin ends of a coupled connection may engage, with seals provided between the first and second threads on each tubular.

La présente invention concerne une version couplée de raccord de tuyauterie fileté (10) qui comprend de premiers filetages (16, 38) et de seconds filetages (20, 34) sur deux corps tubulaires allongés (14, 30), et un raccord (45). Une version de joint de conduite intégral (50) comprend de préférence un premier et un second filetage conique (58, 60) sur chacun des corps tubulaires raccordés (54, 56). Le raccord comprend de préférence une cavité de piégeage de dégrippant dans l'un des tubes raccordés, entre le premier et le second filetage. L'invention comprend de préférence une surface d'étanchéité métallique conique entre le premier et le second filetage. Dans un mode de réalisation préféré, le second filetage est un filetage d'accrochage avec un angle d'inclinaison négatif. Dans un autre mode de réalisation, les extrémités en pointe d'un raccord couplé peuvent coopérer entre elles, des joints d'étanchéité étant placés entre le premier et le second filetage sur chaque corps tubulaire.

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