| 发明名称 |
MARKING OF PIPE JOINTS |
| 摘要 |
An improved method of permanantly marking the location of a tubular joint comprises creating a cavity (3) 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 (4) into said cavity (3) and subsequently joining the tubular ends together. |
| 申请公布号 |
CA2493775(A1) |
申请公布日期 |
2004.01.29 |
| 申请号 |
CA20032493775 |
申请日期 |
2003.07.16 |
| 申请人 |
SHELL CANADA LIMITED |
发明人 |
COLE, ANTHONY THOMAS;DEN BOER, JOHANNIS JOSEPHUS;DIMITRIADIS, KLISTHENIS;ZIJSLING, DJURRE HANS |
| 分类号 |
E21B17/00;E21B47/09;F16L13/02;F16L15/00;G01V15/00;(IPC1-7):G01V15/00;E21B47/00 |
主分类号 |
E21B17/00 |
| 代理机构 |
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代理人 |
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