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发明名称
Hydraulische Rutschschere grossen Durchmessers
摘要
申请公布号
DE69210292(D1)
申请公布日期
1996.06.05
申请号
DE19926010292
申请日期
1992.02.07
申请人
DAILEY PETROLEUM SERVICES CORP., CONROE, TEX., US
发明人
EVANS, ROBERT W., MONTGOMERY, TEXAS 77356, US
分类号
E21B4/14;E21B31/113;(IPC1-7):E21B31/113
主分类号
E21B4/14
代理机构
代理人
主权项
地址
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