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With the implementation of oilfield acidizing processes and the entry into the middle and late stages of oil production, it has become an urgent task to remove contaminants from the bottom of production wells and injection wells as well as near-wellbore formations, restore or improve formation permeability, and increase crude oil production. The AZ-CO corrosion inhibitor is mainly used to reduce acid corrosion to equipment, control acid-rock reaction rate, improve acidizing effect, prevent formation contamination, and reduce implementation costs. Compared with previous corrosion inhibitor products on the market, its corrosion inhibition capability has made certain breakthroughs and has become a mature and stable product.
| Item | Type Ⅰ | Type Ⅱ | Type Ⅲ |
|---|---|---|---|
| Appearance | Light yellow or brown liquid | White or brown liquid | White or brown liquid |
| Density (25℃, g/cm³) | 1.00-1.10 | 1.00-1.10 | 1.00-1.10 |
| Dissolution and Dispersion | The acid solution is a homogeneous liquid, stable without stratification or precipitation within the test time | The acid solution is a homogeneous liquid, stable without stratification or precipitation within the test time | The acid solution is a homogeneous liquid, stable without stratification or precipitation within the test time |
| Model | Item | Acid Type | Test Pressure (Mpa) | Stirring Speed (r/min) | Reaction Time (h) | Corrosion Inhibitor Mass Fraction (%) | Evaluation Index (Corrosion Rate: g/m²·h) |
|---|---|---|---|---|---|---|---|
| Type Ⅰ | Corrosion Rate (60℃) | 20% HCL | - | - | 4 | 1.0 | <10 |
| 12% HCL : 3% HF | <8 | ||||||
| Type Ⅱ | Corrosion Rate (90℃) | 20% HCL | - | - | 4 | 2.0 | <10 |
| 12% HCL : 3% HF | <8 | ||||||
| Type Ⅲ | Corrosion Rate (140℃) | 20% HCL | 16 | 60 | 4 | 3.0 | <60 |
| 12% HCL : 3% HF | <40 |
Packaged in plastic drums or iron drums, with a net content of (200.0±1.0) kg per drum.
1. Transportation: Prevent collisions during transportation to avoid leakage caused by package damage;
2. Storage: Should be stored in a cool and ventilated place, away from high temperatures, fire sources, and strong oxidants.
1. The safe service life of the product is one year. After the expiration date, the corrosion inhibition performance must be re tested, and it can continue to be used only if it is qualified;
2. It is recommended to wear protective gloves and goggles during use to avoid direct contact with skin and eyes. In case of accidental contact, rinse immediately with plenty of water.