METHOD AND APPARATUS FOR MEASURING THE DEPTH OF A TOOL LOWERED INTO A BOREHOLE BY MEANS OF A CABLE,申请号GB19760030058-传众专利搜索

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发明名称	METHOD AND APPARATUS FOR MEASURING THE DEPTH OF A TOOL LOWERED INTO A BOREHOLE BY MEANS OF A CABLE
摘要
申请公布号	GB1554563(A)	申请公布日期	1979.10.24
申请号	GB19760030058	申请日期	1976.07.20
申请人	SCHLUMBERGER LTD	发明人
分类号	E21B47/04;G01B5/18;G01B7/26;(IPC1-7):G01B7/26	主分类号	E21B47/04
代理机构		代理人
主权项
地址

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