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发明名称
A METHOD FOR MONITORING THE HEALTH OF A CHOKE USED IN WELLBORE OPERATIONS
摘要
申请公布号
EP1716313(A1)
申请公布日期
2006.11.02
申请号
EP20050708470
申请日期
2005.02.21
申请人
VARCO I/P, INC.
发明人
KOEDERITZ, WILLIAM, L;GUGGARI, MALLAPPA, I
分类号
E21B21/10;E21B21/08;E21B44/00;F16K37/00;F16K47/04;G06F19/00
主分类号
E21B21/10
代理机构
代理人
主权项
地址
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