INTERNATIONAL PATENT: CHINA NATIONAL PETROLEUM CORPORATION, 中国石油天然气集团有限公司, CNPC CHUANQING DRILLING ENGINEERING COMPANY LIMITED, 中国石油集团川庆钻探工程有限公司 FILES APPLICATION FOR "DOWNHOLE PRESS DRIVE RECIPROCATING PLUNGER PUMP FOR GAS DRILLING"

Posted On: 2025-04-05

GENEVA, April 5 -- 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 CHUANQING DRILLING ENGINEERING COMPANY LIMITED (No. 6 Mengzhuiwan Street, Chenghua DistrictChengdu, Sichuan 610051), 中国石油集团川庆钻探工程有限公司 (中国四川省成都市成华区猛追湾街6号) filed a patent app...

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INTERNATIONAL PATENT: CHINA NATIONAL PETROLEUM CORPORATION, 中国石油天然气集团有限公司, CNPC CHUANQING DRILLING ENGINEERING COMPANY LIMITED, 中国石油集团川庆钻探工程有限公司 FILES APPLICATION FOR "DOWNHOLE PRESS DRIVE RECIPROCATING PLUNGER PUMP FOR GAS DRILLING"