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发明名称
Subsurface safety valve flapper
摘要
申请公布号
IE20100001(A1)
申请公布日期
2010.08.04
申请号
IE20100000001
申请日期
2010.01.05
申请人
BJ SERVICES COMPANY
发明人
ROBERT C. HENSCHEL;ROBERT JANCHA
分类号
E21B34/00
主分类号
E21B34/00
代理机构
代理人
主权项
地址
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