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经营范围
发明名称
WELL ANNULAR CLEARANCE SEAL DEVICE
摘要
申请公布号
RU1789659(C)
申请公布日期
1993.01.23
申请号
SU19894745567
申请日期
1989.10.03
申请人
ZAPADNO-SIBIRSKIJ NI PK I TEKHNOLOGII GLUBOKOGO RAZVEDOCHNOGO BURENIYA
发明人
BELENKOV ANATOLIJ F,SU;KARNAUKHOV MIKHAIL L,SU
分类号
E21B33/12
主分类号
E21B33/12
代理机构
代理人
主权项
地址
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