Polyanionic Cellulose (PAC)

CAS No.: 9004-32-4

Molecular Formular: [C₆H₇O₂(OH)₂CH₂COONa]_n

Structural Formular:

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

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