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PHPA
(Partially Hydrolyzed Polyacrylamide) Powder is a high molecular weight partially hydrolysed Polyacrylamide/ polyacrylate (PHPA) containing co polymer in powder form. The product is used as viscosifier and borehole stabilizer.
Application:
PHPA (Partially
Hydrolyzed Polyacrylamide) Powder should be added in fresh water to get a highly viscous drilling fluid. The marsh funnel viscosity for clay or shale formation should be ≥ 50 seconds per quart and ≥ 60 seconds per quart for sandstone or unconsolidated sand.
Properties:
| Chemical Composition |
Copolymer |
Appearance |
Granular powder |
Ionic |
Anionic |
Degree of Hydrolysis |
20 to 40 percent by mass |
Moisture percentage (at 105 ± 2 o C) |
7 to 10 (max) |
Bulk Density |
≤ 1.0 |
pH (0.5% soln. in distt. water) |
7.5 ± 1.0 |
Solubility |
Soluble up to 20 gm per liter giving viscous solution. |
Characteristics and benefits:
- PHPA (Partially Hydrolyzed Polyacrylamide)
Powder is a cost effective drilling fluid applicable to all types of drilling applications like water wells, diamond coring mineral exploration etc.
- Stabilise water sensitive formations
- Reduces drill pipe torque and pumping pressure.
- Mixes conveniently with stirring in water
- Fluid preparation time reduced drastically as the product develops viscosity rapidly and once prepared the fluid is ready for use
- High viscosity of this drilling fluid helps in better removal of cuttings from borehole
- Reduced recirculation of cutting back into the bore hole because of immediate settling in the pit
- Better shell stabilisation prevents water loss through cracks and fissures
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