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发明名称
STEPPED DRILL STEM ASSEMBLY FOR DIRECTIONAL DRILLING OF WELLS IN ANIZOTROPIC INCLINED ROCK BEDS
摘要
申请公布号
RU1789637(C)
申请公布日期
1993.01.23
申请号
SU19894752015
申请日期
1989.10.25
申请人
N-PROIZV KOOPERATIV "TEKHNIKA ORGANIZATSIYA BURENIYA SKVAZHIN"
发明人
POTASHNIKOV VLADIMIR D,SU;SHENGUR NIKOLAJ V,SU
分类号
E21B7/08
主分类号
E21B7/08
代理机构
代理人
主权项
地址
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