发明名称 FATIGUE-RESISTANT THREADED ELEMENT FOR THREADED TUBULAR CONNECTION.
摘要 <p>A PORTION OF THREADS (12) OF A THREADED ELEMENT (2) HAVE A HELICAL GROOVE (22) OPENING INTO THE THREAD CREST.GROOVE (22) IS FORMED IN ALL OR A PORTION OF THE THREADS OF ONE OR BOTH END ZONES,NAMELY THE FIRST ENGAGING THREAD ZONE (32) AND THE LAST ENGAGING THREAD ZONE (36), AND IT IS OPTIONALLY FORMED IN THE THREADS OF THE MEDIAL THREAD ZONE (34); IT REDUCES THE STIFFNESS OF THREADS CARRYING A GROOVE IN THE END ZONE OR ZONES COMPARED WITH THE STIFFNESS OF THE THREADS IN THE MEDIAL THREAD ZONE.THE THREADED TUBULAR CONNECTION OBTAINED AFTER MAKING UP THE THREADED ELEMENT WITH A MATING THREADED ELEMENT IS MUCH MORE RESISTANT TO CYCLIC TENSILE STRESSES AND/OR AXIAL COMPRESSIVE STRESSES AND/OR FLEXION STRESSES.(FIG 2)</p>
申请公布号 MY128854(A) 申请公布日期 2007.02.28
申请号 MY2002PI00809 申请日期 2002.03.07
申请人 VALLOUREC MANNESMANN OIL & GAS FRANCE;SUMITOMO METAL INDUSTRIES LTD. 发明人 NOEL, THIERRY;ROUSSIE, GABRIEL
分类号 F16L15/00;F16L15/06;F16B33/02 主分类号 F16L15/00
代理机构 代理人
主权项
地址