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发明名称
DEVICE FOR MONITORING AMOUNT OF GAS IN DRILLING FLUID
摘要
申请公布号
SU648720(A1)
申请公布日期
1979.02.25
申请号
SU19772545819
申请日期
1977.11.21
申请人
VNII BUROVOJ TEKHNIKI
发明人
ALPEROVICH SAMUIL A,SU;VARLAMOV VLADIMIR P,SU;YASASHIN ANATOLIJ M,SU;LEVITIN VIKTOR YU,SU;AVETOV RAFIK V,SU
分类号
E21B47/00;E21B49/00;(IPC1-7):E21B47/00
主分类号
E21B47/00
代理机构
代理人
主权项
地址
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