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发明名称
UMLEITUNGSVORRICHTUNG FUER EINEN ROHRSTRANG IM BOHRLOCH.
摘要
申请公布号
DE3782134(D1)
申请公布日期
1992.11.12
申请号
DE19873782134
申请日期
1987.08.26
申请人
HALLIBURTON CO., DUNCAN, OKLA., US
发明人
CHRISTENSEN, JON BRENT, DUNCAN OKLAHOMA 73533, US
分类号
E21B33/124;(IPC1-7):E21B33/124
主分类号
E21B33/124
代理机构
代理人
主权项
地址
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