GENEVA, July 27 -- CHINA NATIONAL PETROLEUM CORPORATION filed a patent application (CN2025/139736) for “LIQUID CARRYING STRUCTURE, GAS-LIQUID CONTACT METHOD AND APPLICATION, AND COOLING APPARATUS FOR PRODUCTION WELLHEAD IN UNDERGROUND COAL GASIFICATION”. With publication no. WO/2026/152917, here are the other details related to the patent application:
Kind: Initial Publication with ISR [A1]
IPC: E21B 36/00
Notably, the patent application was submitted under the International Patent Classification (IPC) system, which is managed by the World Intellectual Property Organization (WIPO).
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