1. Property The product is a new kind of strong complex depressant used in drilling fluid. Its working principle is: stabilize the well wall and check the dispersion of drilling chips by forming firm films over the well wall and drilling chips through its functions of absorption and film formation of coordinated complex. If used together with adjuvants like polymerized alcohol the caving-in checking result will be better. It is well compatible with every kind of mud additives. 2. Quality Indexes Item Indexes Appearance Black powder Moisture, % d15 Fineness d10 PH e10.5 Inhibitive mud making rate, e85 Water soluble, % e85 3. Use Used in each drilling system to stabilize well wall by preventing clay from wet expansion and effectively check solid phase of mud. Added in well completing fluid to effectively protect oil and gas layer. Recommended quantity: 1-3% . Mud-PH is greater than l0.5. 4. Storage and package 25Kg net sealed in 4-in-1 compound paper bag with plastic lining. During storage and transport see that the bag is intact as the product is water soluble.