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发明名称
BRAKING DEVICE FOR TOOL STRINGS
摘要
申请公布号
EP1283938(A1)
申请公布日期
2003.02.19
申请号
EP20010938367
申请日期
2001.05.25
申请人
WEATHERFORD/LAMB INC.
发明人
LAWRENCE, LEWIS;SCOTT, BRIAN;MARTIN, DAVID;MAKIN, GRAEME;FERGUSON, STUART
分类号
E21B23/01;E21B23/04;E21B40/00;(IPC1-7):E21B23/01
主分类号
E21B23/01
代理机构
代理人
主权项
地址
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