International Patent: REVERSE CIRCULATION DRILLING DEVICE HAVING REAMING FUNCTION AND USE METHOD THEREOF

GENEVA, July 6 -- GRANDASY ENGINEERING COMPANY LIMITED filed a patent application (CN2025/144420) for “REVERSE CIRCULATION DRILLING DEVICE HAVING REAMING FUNCTION AND USE METHOD THEREOF”. With publication no. WO/2026/138745, here are the other details related to the patent application:

Kind: Initial Publication with ISR [A1]

IPC: E21B 4/14

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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