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发明名称
METHOD AND APPARATUS FOR SELECTIVELY SHIFTING A TOOL MEMBER
摘要
申请公布号
GB2228028(B)
申请公布日期
1992.08.12
申请号
GB19900001707
申请日期
1990.01.25
申请人
* BAKER HUGHES INCORPORATED
发明人
MARK E. * HOPMANN;DOUGLAS JAMES * MURRAY;SCOTT CLAYTON * STRATTAN
分类号
E21B34/10;E21B34/12;E21B34/14
主分类号
E21B34/10
代理机构
代理人
主权项
地址
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