Threaded connection with improved root thread profile
摘要
A threaded connection design having a double ellipse in the thread root for reducing stress fatigue is illustrated in this disclosure. The root groove includes a first portion comprising a first elliptical surface being part of a first ellipse. The root groove further includes a second portion comprising a second elliptical surface, being part of a second ellipse, and the second elliptical surface being joined tangentially at a first end to the first elliptical surface at a junction point that defines the bottom of the root groove. The second elliptical surface is joined tangentially at a second end to the load flank.
申请公布号
EP2602423(A3)
申请公布日期
2015.09.02
申请号
EP20120193698
申请日期
2012.11.21
申请人
TENARIS CONNECTIONS LIMITED
发明人
MAZZAFERRO, GASTON MAURO;COPPOLA, TOMMASO;AMATO, STEFANO;ARMENDARIZ, RAMON ALBERTO AGUILAR;DARCIS, PHILIPPE PIERRE