Sinopec Shengli Petroleum Engineering Co., Ltd.’S 2026 Centralized Bidding For Chemical Agents For Drilling Fluids (Open To All Domestic Exploration Areas)/Polyanionic Cellulose/10190T B3 Cellulose\Low Viscosity Polyanionic Cellulose Pac-Lv Q/Shcg 106 Prequalification Announcement