SKRUKOBLING FOR STAALROER, FREMGANGSMAATE FOR DENNES FREMSTLLING OG APPARAT FOR FREMGANGSMAATENS UTFOERELSE.,申请号NO19850001092-传众专利搜索

SKRUKOBLING FOR STAALROER, FREMGANGSMAATE FOR DENNES FREMSTLLING OG APPARAT FOR FREMGANGSMAATENS UTFOERELSE.

申请公布号：NO164931(B)

申请号：NO19850001092

申请日期：1985.03.19

申请公布日期：1990.08.20

申请人：

VALLOUREC

发明人：PLAQUIN, BERNARD;FRADIN, LOUIS

分类号：F16L15/00;E21B17/042;F16L15/08;(IPC1-7):E21B17/042;B23G9/00;G01B3/40;G01B3/48

主分类号：F16L15/00

摘要：The present invention concerns a new threaded joint for steel tubes, usable in particular in the petroleum industry, which contains a female element equipped with conical threads having an internal screw stop mating and a male element correspondingly threaded with a screw stop having a form corresponding to the female element. The male element stop and the female element stop are each manufactured by cold working using a tool capable of engaging in or on the threads of the corresponding element.