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Viscosifier
Carboxymethyl Cellulose Sodium (CMC)-Oil Drilling Grade
CAS NO.: 9000-11-7
Molecular Formula: [C6H7O2(OH)2CH2COONa]n
Structural Formula:
Property:
Carboxymethyl Cellulose Sodium (CMC) is a cellulose derivative obtained by chemically modificating the natural cellulose. CMC is one of the most important water soluble polymers with many advantages that other natural or synthetic glues do not have. CMC is white and flowing fine powder. CMC is tasteless, smelless, mould-proof, non-toxic, non-flammable and easily dissolved in water to become transparent viscose solution. CMC solution has good properties of thickening, adhering, emulsifying, and stabilizing. membrane forming, moisture-holding, shape-holding, dispersing and anti-enzyme. The solution of CMC can be mixed with dissolvable animal glues, glycerin, sobbitol, Arabic gum, pectin, xanthic gum and dissolvable starch.
Specification:
Physical Specification of CMC for Oil drilling liquids & Oil drilling liquids properties (According to SY5093-92)
| 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 |
| 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 | ||
Technical Specification of CMC for oil drilling liquids (According to GB/T5005-2001 or API)
| Type | Specification | ||||
| 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 | ||||
Note:We could arrange product according to customer's specification
Usage:
CMC Oil Drilling Grade used in fracturing fluid ,drilling fluid and well cementing fluid as fluid loss controller and tackifier. CMC
can protect the shaft wall and prevent mud loss thus enhance recovery efficiency.
CMC has the following characteristics:
• Excellent water retention even at low concentration.
• Excellent thickening effect.
• Good resistance to salt and temperature change.
• Imparts excellent rheological property.
Packing:
Packed in multiply paper bags or fiber drums (25KG), or as per customer requirement; keep dry
Keywords:
Sodium CarboxyMethyl Cellulose, CMC, CMC-Na, CM-Cellulose, Carboxymethyl Cellulosec Carboxymethyl cellulose Ether