Sinopec Shengli Petroleum Engineering Co., Ltd.’S 2026 Centralized Bidding For Chemical Agents For Drilling Fluids (Public, Domestic Exploration Areas)/Carboxymethylcellulose Sodium Salt/8907T B2 Cellulose\Carboxymethylcellulose Sodium Salt Lv-Cmc Q/Sh Cg0165 Prequalification Announcement