Polyanionic cellulose (PAC)

PAC is divided into two types: high viscosity (HV) and low viscosity (LV), which can be used as thickener, rheology control agent, adhesive, stabilizer, protective colloid, suspending agent and water retention agent.
In the oil mining industry, PAC is a better drilling mud treatment agent and material for preparing completion fluids, with high slurry production rate and good salt and calcium resistance. For light cement slurry, sea cement slurry and saturated salt cement slurry, PAC is a very good fluid loss treatment agent, and has a good viscosity lifting ability and high temperature resistance (150 ℃) ability.
It is suitable for preparing freshwater, seawater and saturated brine completion fluids, and can be prepared into various density completion fluids under the weight of calcium chloride, and can make the completion fluids have a certain viscosity and a low fluid loss.
The high-viscosity and low-viscosity PACs produced by our company comply with European OCMA standards and American API standards.
Specifications: High viscosity (HV) and low viscosity (LV)

Polyanionic cellulose (PAC) Specification

Grade
PAC-HV-1
PAC-HV-2
PAC-LV-1
PAC-LV-2
Degree of substitution(D.S)
≥0.85
≥0.9
≥0.95
≥0.95
Viscosity(2%solution,NDJ-79,25℃)
≥1600mPa.s
≥1600mPa.s
50~100mPa.s
80~100mPa.s
Moisture
≤10%
≤9%
≤10%
≤10%
pH
6.5 ~ 8.5
6.5 ~ 8.5
6.0 ~ 8.5
6.0 ~ 8.5
造浆率(θ600转读数):
0.88克样品在350ml去离子水
1.33克样品在350ml 4%NaCl
1.0克样品在350ml饱和NaCl
≥30
≥30
≥30
流变性能:
2.0克样品在350ml海水
3.0克样品在350ml海水
4.0克样品在350ml海水
YP≥5
YP≥20
YP≥40
YP≤1
YP≤1
YP≤1
API 失水:
2.0克样品在350ml海水
3.0克样品在350ml海水
4.0克样品在350ml海水
≤20ml
≤15ml
≤10ml
≤20ml
≤15ml
≤10ml
API 失水:
0.75克样品在海水中
≤26ml
流变性能:
2.5克样品在350ml去离子水中
2.5克样品在350ml饱和NaCl
PV<18  YP<18
PV<8   YP<8
API 失水:
0.5克样品在350ml去离子水
1.0克样品在350ml海水/氯化钾
≤10ml
≤24ml