Oil Drilling ChemicalsCurrent page: Home > Oil Drilling Chemicals
Polyanionic Cellulose (PAC)
CAS No.: 9004-32-4
Molecular Formular: [C6H7O2(OH)2CH2COONa]n
Structural Formular:
.gif)
Property:
PAC is a kind of nonionic cellulose ether featured the properties of high purity, high DS, particularly high viscosity or low viscosity. These products are demi-natural polymer additive, thickening agent, filtrate reducer.
PAC is an indispensable product for drilling mud making. It is high purity product; the water solution of this white powder is transparent and viscid. As water-soluble polymer, PAC dissolves immediately in cold/hot water and can be used as a thickening agent, rheology controller, bond, stabilizer, colloid protector, suspending agent, and filtrate reducer.
PAC is a good drilling mud additive and also an important material for confecting well liquid, a high mud volume product that featured high acid-resistance and salt-resistance ability. PAC is a good filtrate reducer with the capacity of increasing viscosity and anti-high temperature (150°C) in the freshwater, seawater, or even saturated brine well-completion liquid. PAC is suitable for confecting the completion fluid with these 3 kinds of water above.
Specification:
| Test Item | Standard | ||
| PAC-LV | PAC-HV | ||
| Appearance | Freely flowable powder | Freely flowable powder | |
| PH | 6.0-8.0 | 6.0-8.0 | |
| Purity % | ≥95% | ≥95% | |
| Moisture % | ≤10% | ≤10% | |
| D.S. | ≥0.90 | ≥0.90 | |
| Viscosity Brookfield 1% | ≤50 | ≥1500 | |
| API Fluid Lose | Increase 0.57% | ≤25.0 ml | ≤20.0ml |
| Increase 0.86% | ≤15.0 ml | ≤15.0ml | |
| Increase 1.14% | ≤10.0 ml | ≤10.0ml | |
| YP Value | Increase 0.57% | ≤0.5 | ≥2.4 |
| Increase 0.86% | ≤1.0 | ≥9.6 | |
| Increase 1.14% | ≤1.5 | ≥19.2 | |
API grade:
| Item | Specification | |
| PAC-LV | PAC-HV | |
| Appearance | White to light yellow powder | White to light yellow powder |
| Moisture % (m/m) | 10 max | 10 max |
| Apparent Viscosity (mPa.s) | 40 max | 50 min |
| Filtrate Loss (mL) | 16 max | 23 max |
NOTE: The parameters can be adjusted as per requirements.
Usage:
PAC-HV is for water-based drilling fluids, which can effectively reduces the filtration rate of many water-based oil and gas drilling fluids and may also be used to increase and stabilize viscosity to improve hole cleaning and suspension properties in a wide variety of fluid environment.
PAC-LV is for use in solids-laden, water-based drilling fluids, which can effectively reduces the filtration rate of many water-based drilling fluids, without causing significant increases in viscosity or gel strength.
PAC R is a cost-effective additive to reduce API filtration rate of many water based drilling fluids including freshwater, seawater, saturated saltwater and solids-free brines, native mud, flocculated mud, inhibited mud and contaminated systems. PAC R increases and stabilizes viscosity to improve rheology, wellhole cleaning and suspension property by coating and encapsulating cuttings and solids of drilling fluids. PAC R is effective over a wide range of pH environments. It lubricates solids in the system, improve wallcake characteristics and reduces the potential for stuck pipe.
Package and Storage:
Packed in multiply paper bags or fiber drums (25KG), or as per customer requirement; keep dry.
Keyword:
polyanionic cellulose, PAC, cellulose
