INTERNATIONAL PATENT: CNPC BOHAI DRILLING ENGINEERING COMPANY LIMITED, 中国石油集团渤海钻探工程有限公司, CHINA NATIONAL PETROLEUM CORPORATION, 中国石油天然气集团有限公司 FILES APPLICATION FOR "COPOLYMER AND PREPARATION METHOD THEREFOR AND FRACTURING FLUID"

Posted On: 2025-04-28

GENEVA, April 28 -- CNPC BOHAI DRILLING ENGINEERING COMPANY LIMITED (No. 83, 2nd Avenue, TEDABinhai New Area, Tianjin 300457), 中国石油集团渤海钻探工程有限公司 (中国天津市滨海新区经济技术开发区第二大街83号), CHINA NATIONAL PETROLEUM CORPORATION (9 Dongzhimen North StreetDongcheng District, Beijing 100007), 中国石油天然气集团有限公司 (中国北京市东城区东直门北大街9&...

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INTERNATIONAL PATENT: CNPC BOHAI DRILLING ENGINEERING COMPANY LIMITED, 中国石油集团渤海钻探工程有限公司, CHINA NATIONAL PETROLEUM CORPORATION, 中国石油天然气集团有限公司 FILES APPLICATION FOR "COPOLYMER AND PREPARATION METHOD THEREFOR AND FRACTURING FLUID"