An improved method of permanently marking the location of a tubular joint, the method including creating a cavity into the end surface of one of the tubular ends that are to be joined by a forge weld or screw thread connection, inserting a marker into said cavity and subsequently joining the tubular ends.
申请公布号
EP1532474(A1)
申请公布日期
2005.05.25
申请号
EP20030765101
申请日期
2003.07.16
申请人
SHELL INTERNATIONALE RESEARCHMAATSCHAPPIJ B.V.
发明人
DEN BOER, JOHANNIS, JOSEPHUS;COLE, ANTHONY, THOMAS;DIMITRIADIS, KLISTHENIS;ZIJSLING, DJURRE, HANS
