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经营范围
发明名称
Valves for use in wells
摘要
申请公布号
GB2362908(A)
申请公布日期
2001.12.05
申请号
GB20010017915
申请日期
2000.01.18
申请人
* SCHLUMBERGER TECHNOLOGY CORPORATION
发明人
DAVID L * MALONE
分类号
E21B21/10;E21B34/06;E21B34/10;(IPC1-7):E21B34/06
主分类号
E21B21/10
代理机构
代理人
主权项
地址
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