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发明名称
Shut-off valve for downhole tool for retrieving said tool from a well under pressure
摘要
申请公布号
EP0962625(A3)
申请公布日期
2001.01.10
申请号
EP19990304336
申请日期
1999.06.03
申请人
SCHLUMBERGER HOLDINGS LIMITED;SERVICES PETROLIERS SCHLUMBERGER;SCHLUMBERGER TECHNOLOGY B.V.
发明人
EDWARDS, GLEN A.;HUBER, KLAUS B.
分类号
E21B33/068;E21B43/119;(IPC1-7):E21B43/119
主分类号
E21B33/068
代理机构
代理人
主权项
地址
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