INTERNATIONAL PATENT: CHINA NATIONAL PETROLEUM CORPORATION, 中国石油天然气集团有限公司, KEMBL PETROLEUM TECHNOLOGY CO., LTD., 北京康布尔石油技术发展有限公司, CNPC ENGINEERING TECHNOLOGY R&D COMPANY LIMITED, 中国石油集团工程技术研究院有限公司 FILES APPLICATION FOR "RAPID DISPERSION AND HYDRATION DEVICE FOR POLYMER DRAG REDUCER"

GENEVA, July 7 -- 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号), KEMBL PETROLEUM TECHNOLOGY CO., LTD. (Floor 2, Building 1, Yard 5, Huanghe Street, Shahe TownChangping District, Beijing 102206), 北京康布尔石油技术发展有限公司 (中国北京市昌平区沙河镇黄河街5号院1号楼2...