Technical Specification of CMC carboxymethly Cellulose for oil drilling liquids according to API
Specification of CMC carboxymethly Cellulose HV and LV
| Type | Specification of CMC HV and LV | ||
| CMC-HVT | Viscometer 600r/min | Distilled water | 30.0 min |
| 40g/dm3 brine | 30.0 min | ||
| Saturated brine | 30.0 min | ||
| Filtration Loss (ml) | 10.0 max | ||
| CMC-LVT | Viscometer 600r/min | 90.0 max | |
| Filtration Loss (ml) | 10.0 max | ||
Specification of CMC carboxymethly Cellulose LV MV and HV
| LV-CMC | MV-CMC | HV-CMC | |
| Appearance | White or light yellow powder, freely flowable | ||
| Water,% | 10 max | ||
| CMC,% | 80.0 min | 85.0 min | 95.0 min |
| Substitution degree,% | 0.80 min | 0.65 min | 0.8 min |
| PH | 7.0-9.0 | 7.0-9.0 | 6.5-8.0 |
Properties and measurement of CMC carboxymethly Cellulose
| Type | Item | Typical measured values | |||
| Distilled water | Brine | Saturated brine | |||
| Base mud | Filtration loss, ml | 60±10 | 90±10 | 100±10 | |
| Apparent viscosity, mPa•s | 6 max | 6 max | 10 max | ||
| PH | 8.0±1.0 | 8.0±1.0 | 7.5±1.0 | ||
| HV-CMC | Mud generating capacity, m3 /t | 200 min | 150 min | 160 min | |
| LV-CMC | Filtration loss = 10ml | Addition rate, g/l | — | 7.0 max | 10.0 max |
| Apparent viscositymPa•s | — | 4.0 max | 6.0 max | ||
| MV-CMC | Addition rate,g/l | 6.0 | 14.0 | 3.5 | |
| Apparent viscosity,mPa•s | 15 min | 15 min | 15 min | ||
| Filtration loss,ml | 9 max | 9 max | 9 max | ||