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专利号:WO2014012349(A1)专利名称:INFORMATION TRANSMISSION APPARATUS OF WELL LOGGING DURING DRILLING申请号:WO2013CN00713申请日:2013.06.18专利申请人:CHINA NATIONAL PETROLEUM CORPORATION;CNPC DRILLING RESEARCH INSTITUTE;BEIJING PETROLEUM MACHINERY FACTORY公开日:2014.01.23An information transmission apparatus of well logging during drilling comprises a hollow drilling rod
Patent application number: WO2014012349 (A1) Title: INFORMATION TRANSMISSION APPARATUS OF WELL LOGGING DURING DRILLING Application No .: WO2013CN00713 Date of Patent Application: 2013.06.18 Title: CHINA NATIONAL PETROLEUM CORPORATION; CNPC DRILLING RESEARCH INSTITUTE; BEIJING PETROLEUM MACHINERY FACTORY Publication date: 2014.01 .23An information transmission apparatus of well logging during drilling comprises a hollow drilling rod