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发明名称
PROGRESSIVE CAVITY DRIVE TRAIN WITH ELASTOMERIC JOINT ASSEMBLY FOR USE IN DOWNHOLE DRILLING
摘要
申请公布号
GB9112877(D0)
申请公布日期
1991.07.31
申请号
GB19910012877
申请日期
1991.06.14
申请人
IDE, RUSSELL D
发明人
分类号
E21B4/02;F04C2/107;F16D3/38
主分类号
E21B4/02
代理机构
代理人
主权项
地址
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