INTERNATIONAL PATENT: CHINA NATIONAL PETROLEUM CORPORATION, 中国石油天然气集团有限公司, CNPC NATIONAL ENGINEERING RESEARCH CENTER FOR OIL & GAS DRILLING EQUIPMENT CO., LTD., 中油国家油气钻井装备工程技术研究中心有限公司, BAOJI OIL-FIELD MACHINERY CO., LTD., 宝鸡石油机械有限责任公司 FILES APPLICATION FOR "CRANK ARRANGEMENT METHOD FOR CRANKSHAFT, DEVICE, STORAGE MEDIUM AND PROGRAM PRODUCT"

GENEVA, April 17 -- 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 ENGINEERING RESEARCH CENTER FOR OIL & GAS DRILLING EQUIPMENT CO., LTD. (No.2 Dongfeng Road, Jintai DistrictBaoji, 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Ö...