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发明名称
INTERNAL RELEASABLE PIPE-ENGAGING DEVICE
摘要
申请公布号
SU878899(A2)
申请公布日期
1981.11.07
申请号
SU19782591572
申请日期
1978.03.16
申请人
VNII RAZRABOTKI EKSPLUATATSII NEFTEPROMYSLOVYKH TRUB
发明人
CHEPOVETSKIJ ALEKSANDR V,SU;SPIVAKOVSKIJ YURIJ I,SU;ALEKSANDROV EDUARD A,SU;NENASHEV EVGENIJ N,SU
分类号
(IPC1-7):E21B31/02
主分类号
(IPC1-7):E21B31/02
代理机构
代理人
主权项
地址
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