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经营范围
发明名称
Fluid actuated circulating sub
摘要
申请公布号
GB2449961(B)
申请公布日期
2011.11.02
申请号
GB20080008637
申请日期
2008.05.13
申请人
BJ SERVICES COMPANY
发明人
MAXIMILIANO MONDELLI;GEORGE KRIEG;DAVID HERBERT;DAVID ROBINSON
分类号
E21B34/14;E21B21/10
主分类号
E21B34/14
代理机构
代理人
主权项
地址
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