Research Article
Effect of Nitric Acid on the Low Fluorescing Performance of Drilling Fluid Lubricant Based Animal and Vegetable Oils
Table 4
Foaming rate of E167 at different conditions.
| | Sample | Experimental condition | Foaming rate (%) |
| | Distilled water + 0.5% X-E167 | Room temperature | 3.3 | | Fresh water mud + 1.0% X-E167 | Room temperature | 6.7 | | Fresh water mud + 1.0% X-E167 | Thermal ageing 120°C × 16 h | 5.0 | | Fresh water mud + 1.0% X-E167 | Thermal ageing 150°C × 16 h | 43.3 |
|
|
Fresh water mud is mixed with 3.7% bentonite and distilled water (Chifeng Tianyu), pH = 9, AV = 8-9 mPa·s.
|
