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Carcagno Gabriel E, Toscano Rita G, Nakamura Hisao, Coppola Tommaso, Ono Tatsuo: Threaded tube joint. Tenaris Connections, Carcagno Gabriel E, Toscano Rita G, Nakamura Hisao, Coppola Tommaso, Ono Tatsuo, GERVASI Gemma, March 18, 2004: WO/2004/023020 (6 worldwide citation)

A threaded tube joint for oil extraction industry has a trapezoidal thread and a toroidal sealing surface (11) placed at its end near the thread and engages, for sealing, a corresponding frusto-conical sealing surface (12) wherein the toroidal sealing surface (11) has a radius Rs value comprised wit ...


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Carcagno Gabriel E, Della, Pina Giuseppe, Toscano Rita G, Coppola Tommaso: Threaded pipe joint. Tenaris Connections, Carcagno Gabriel E, Della, Pina Giuseppe, Toscano Rita G, Coppola Tommaso, GERVASI Gemma, November 13, 2003: WO/2003/093716

Threaded joint for pipes consisting of a male member (1) and a female member (2), which are provided on the outer. and inner surfaces respectively with two threading portions .presenting a lead-in flank ß such that 10° 2-D12)/(D42-D32) _> 0,5.