Home / Standards / GB/T 46329-2025 GB/T 46329-2025 Active Organophilic clay for oil based drilling fluids 油基钻井液用有机土 Standard Type GBT ICS 75.020 CCS E14 Status 现行 Issue Date 2025-10-05 Implementation 2026-05-01 Responsible Dept 国家标准委 Drafting Unit N/A