Threaded and coupled connection for improved fatigue resistance

Details Threaded and coupled connection for improved fatigue resistance Threaded and coupled connection for improved fatigue resistance

F - Mech Eng,Light,Heat,Weapons

16

L

F16L 15/00 (2006.01) E21B 17/08 (2006.01) F16L 15/06 (2006.01) F16L 25/00 (2006.01) E21B 17/042 (2006.01)

Patent

CA 2338956

A coupling (10) for a threaded and coupled connector used to secure the ends of the tubular pipe sections together comprising a tubular coupling body (11) with axially extending, internally threaded areas (11a, 11b) at each end of the body (11). Tapering external surfaces (11h, 11f) are formed on the body (11) which extend from a central portion of the body (11) toward each end of the body (11) and reduce in diameter in an axial direction from the central portion. The taper length (11h, 11f) is functionally related to the minimum outside diameter of a pipe section (12) to which the coupling is to connect.

La présente invention concerne un raccord (10) à montage fileté servant à joindre deux tuyaux par leurs extrémités. Ce raccord (10) est constitué d'un corps tubulaire (11). Des extrémités de ce corps (11) partent des segments axiaux (11a, 11b) pourvus de filets intérieurs. Le corps (11) est pourvu de surfaces extérieures (11h, 11f) en biseau, s'effilant vers chaque extrémité du corps (11) de façon que le diamètre du corps se réduise axialement à partir du segment central. Le biseautage (11h, 11f) est réalisé sur une longueur fonction du diamètre extérieur minimum du segment de tube (12) où doit se monter le raccord.

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