INTERNATIONAL PATENT: CHINA NATIONAL PETROLEUM CORPORATION, 中国石油天然气集团有限公司, CNPC NATIONAL OIL & GAS DRILLING EQUIPMENT ENGINEERING & TECHNOLOGY RESEARCH CENTER CO., LTD., 中油国家油气钻井装备工程技术研究中心有限公司, CNPC BAOJI OILFIELD MACHINERY CO., LTD, 宝鸡石油机械有限责任公司 FILES APPLICATION FOR "WINDING DEVICE AND METHOD FOR INITIAL STEEL WIRE ROPE WINDING ON DRAWWORKS AND DRILLING RIG"

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), CNPC NATIONAL OIL & GAS DRILLING EQUIPMENT ENGINEERING & TECHNOLOGY RESEARCH CENTER CO., LTD. (2 Dongfeng Road, Jintai District,Baoji, Shaanxi 721002), 中油国家油气钻井装备工程技术研究中心有限公司 (中国陕西省宝鸡市金...