Technical Specification of CMC carboxymethly Cellulose for oil drilling liquids according to API
Regarding oil drilling fluids, Specification of CMC (carboxymethyl cellulose) technical requirements are absolutely important for guaranteeing best performance. Each grade of CMC—HV (High Viscosity), LV (Low Viscosity), and MV (Medium Viscosity)—fits a different need. API criteria state that CMC offers necessary characteristics including viscosity and regulated filtration loss, which are absolutely necessary to keep drilling operations stable and efficient. Choosing the correct type of CMC for your drilling requirements depends on an awareness of these criteria. See the CMC Carboxymethyl Cellulose pages for comprehensive details.
Correctly selecting and applying CMC in drilling fluids improves wellbore stability, reduced fluid loss, and enhanced mud viscosity management, which affects drilling performance and cost efficiency. To work in varied drilling conditions, CMC solutions must fulfill strict API criteria, therefore engineers must grasp HV and LV grade parameters to optimize drilling fluid compositions
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 | ||
There a lot of specification of CMC. For more you can check CMC carboxymethly Cellulose pages.