Polyanionic Cellulose (PAC)
|Not Applicable, it decomposes
|Soluble at 20°C
|10 -12 mPa.s
Polyanionic Cellulose is a polymer derivative of Cellulose with a high degree of purity. It is regarded as a premium product because of its typical higher carboxymethyl substitution and the presence of less residual NaCl than that of technical-grade Carboxymethylcellulose (CMC). However, PAC still contains a considerable amount of NaCl. It is a water-based drilling fluid used for varying purposes in fluid environments. Its molecular structure is similar to that of CMC, but it is considered to be better than CMC. It also has low water loss properties.
The chemical has a white to off-white color, and it exists either in granule or powder form. It is odorless. It is soluble in water. It can cause combustible dust concentrations in the air. It is a non-toxic chemical. It has a stable resistance to heat, bacteria, and salt.
Chemical Applications and Strengths
Polyanionic Cellulose is an extremely useful organic chemical, and for that reason, it has several industrial uses. Its main applications and strengths are:
- It is used as a main fluid-loss reducer in water-based drilling fluids.
- It is commonly used as a drilling fluid additive.
- It is used to cool down and lubricate the mud-bit while drilling.
- It aids in the suspension of formation cuttings.
- It is used in adjusting mud viscosity levels.
- It can be used as part of a mixture to change pH levels.
- It aids the transportation of the surface and manages formation pressure throughout the oil well.
- It is used to prevent well collapse while drilling.
- It is used to keep down the turbulence scale to minimize the pressure loss in the reverse-flow system.
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