INTERNATIONAL PATENT: HEFEI DESIGN & RESEARCH INSTITUTE OF COAL INDUSTRY CO., LTD, 煤炭工业合肥设计研究院有限责任公司, CHINA COAL SPECIAL DRILLING CO., LTD., 中煤特殊凿井有限责任公司 FILES APPLICATION FOR "CO2TRANSCRITICAL FREEZING SYSTEM AND FREEZING METHOD"

Posted On: 2026-04-27

GENEVA, April 27 -- HEFEI DESIGN & RESEARCH INSTITUTE OF COAL INDUSTRY CO., LTD (No. 355 Fuyang North RoadHefei, Anhui 230041), 煤炭工业合肥设计研究院有限责任公司 (中国安徽省合肥市阜阳北路355号), CHINA COAL SPECIAL DRILLING CO., LTD. (131Dongshan RoadHuaibei, Anhui 230001), 中煤特殊凿井有限责任公司 (中国安徽省淮北市东山路131号) filed a patent application (PCT/CN2024/143650) for "CO2TRANSCRITICAL FREEZING SYSTEM AND FREEZIN...

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INTERNATIONAL PATENT: HEFEI DESIGN & RESEARCH INSTITUTE OF COAL INDUSTRY CO., LTD, 煤炭工业合肥设计研究院有限责任公司, CHINA COAL SPECIAL DRILLING CO., LTD., 中煤特殊凿井有限责任公司 FILES APPLICATION FOR "CO2TRANSCRITICAL FREEZING SYSTEM AND FREEZING METHOD"