DISPOSITIVO DI CEMENTAZIONE A PIU'STADI E DI RIEMPIMENTO A GONFIAGGIO DEL RIVESTIMENTO INTERNO DI UN FORO DI TRIVELLAZIONE.,申请号IT19810022959-传众专利搜索

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发明名称	DISPOSITIVO DI CEMENTAZIONE A PIU'STADI E DI RIEMPIMENTO A GONFIAGGIO DEL RIVESTIMENTO INTERNO DI UN FORO DI TRIVELLAZIONE.
摘要
申请公布号	IT8122959(D0)	申请公布日期	1981.07.15
申请号	IT19810022959	申请日期	1981.07.15
申请人	HALLIBURTON CO.	发明人	DAVID DURWARD SZARKA
分类号	E21B33/127;E21B33/14;E21B33/16;E21B34/14;(IPC1-7):E21F/	主分类号	E21B33/127
代理机构		代理人
主权项
地址

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