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发明名称
ARTICULATED COUPLING PIECE OF DRILL PIPE STRING
摘要
申请公布号
PL247786(A2)
申请公布日期
1984.11.08
申请号
PL19840247786
申请日期
1984.05.21
申请人
OS BAD ROZWOJOWY PRZEM SIARKO
发明人
DUL BRONISLAW;GALENT WIESLAW;BURZYNSKI WALDEMAR;BARAN EDWARD;KUCWAJ ZYGMUNT;RAWSKI JAN
分类号
E21B;E21B17/02;(IPC1-7):E21B/
主分类号
E21B
代理机构
代理人
主权项
地址
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