Physical & chemical specifications for PAC:
|
Item |
Quality index |
|
Purity,%(on dry base) |
95.0 |
|
Viscosity |
PAC-HV(Brookfield 1% 30rpm, 25 ,dry base) |
1500 |
|
PAC-LV(Brookfield 2% 30rpm, 25 ,dry base) |
100 |
|
D.S. |
0.90 |
|
Particle size,%(pass 80 mesh) |
95.0 |
|
Ph |
6.5-8.5 |
|
Moisture,% |
10. |
Performance in mud:
|
Item |
PAC-HV |
PAC-LV |
|
Fluid loss |
|
ml,Adding 0.57%(2ppb) |
20 |
25 |
|
ml,Adding 0.86%(3ppb) |
15 |
15 |
|
ml,Adding 1.14%(4ppb) |
10 |
10 |
|
Yield Point |
|
YP,Adding 0.57%(2ppb) |
2.4Pa(5lb/100sq.ft) |
1.0Pa(2lb/100sq.ft) |
|
YP,Adding 0.86%(3ppb) |
9.6Pa(20lb/100sq.ft) |
2.9Pa(6lb/100sq.ft) |
|
YP,Adding 1.14%(4ppb) |
19.2Pa(40lb/100sq.ft) |
4.8Pa(10lb/100sq.ft) |
|
PAC-HV Mud making volume: |
|
Item |
Distilled water |
40g/l Salt water |
Saturated water |
|
PAC-HV |
Mud making volume, M3/T |
400 |
230 |
280 |
|
POLYANIONIC CELLULOSE (PAC) |
|
FOR FLUID LOSS CONTROL IN OIL WELL DRILLING MUDS |
|
A good drilling fluid, |
|
• |
Promotes a fast rate of penetration, |
|
• |
Stabilizes shales, |
|
• |
Puts a protective cake, over porous sections, |
|
• |
Keeps the hole clean |
|
• |
Controls pressure. |
|
• |
It must have enough viscosity and gel strength to suspend cutting and weight materials. |
|
Polyanionic Cellulose products are field tested and especially developed to improve the effectiveness of oil well drilling muds available in two grades. |
|
SILENT FEATURES OF POLYANIONIC CELLULOSE |
|
• |
Improves control of fluid loss |
|
• |
Compatible in high saline conditions |
|
• |
Resistant to bacterial attack |
|
• |
Resistant to degradation at high temperature |
|
• |
Help to speed up drilling operation. |
|
ADVANTAGES OF POLYANIONIC CELLULOSE IN DRILLING MUDS |
|
• |
Polyanionic Cellulose Provides controlled viscosity with the lowest possible solids contents. |
|
• |
It is able to promote fast rate of penetration. |
|
• |
It is a pure, high, molecular weight, polymer that is easily dispersible in all water base-drilling moods. |
|
• |
It is effective in fresh water and in all ranges of salt water, from seawater to saturated salt-water mud system. |
|
• |
It gives excellent whole control properties a minimum of solids. |
|
• |
It is non - biodegradable and extremely resistant to microorganisms. |
|
YIELD
A small quantity of Polyanionic Cellulose gives high yield. One ton of PAC will produce about 2,800 barrels of 15 - centipoises mud in fresh water. Thus an ultra low solid system is maintained at all times. This promotes rapid penetration, good whole conditions and economy.
FILTER CAKE PAC
Gives a thin slick tough filter cake that helps prevent sticking of drill pipe.
CLAY PARTICLES
PAC is absorbed on the clay particles and reduces water loss, cake thickness and solids invasion.
PAC protects, clays from flocculation and reduces the effects of the contamination.
USING COMBINATION'S OF POLYANIONIC CELLULOSE
REGULAR AND LOW VISCOSITY
Used together in appropriate proportion regular and low viscosity of PAC combines to enhance the properties of mud. Polyanionic Cellulose Regular, the longer chain polymer gives the better inhabitation and water loss control than PAC low viscosity grade. A small amount of PAC low viscosity is admixed to a high solids mud to improve viscosity control. Regular PAC than added, good inhabiting and water loss control is attained without increasing viscosity. |
|
PACKING AND STORAGE
Polyanionic Cellulose is supplied in 25 Kilo net weights HDPE - polylined sacks with extra liner inside. It should be stored in the dry under which conditions it can be kept indefinitely. |
|
O I L W E L L D R I L L I N G |
|
Polyanionic Cellulose ( PAC ) |
|
Properties / Purpose |
|
• Promotes a fast rate of penetration,
• Stabilizes shales,
• Puts a protective cake, over porous sections,
• Keeps the hole clean.
• Controls pressure.
• It must have enough viscosity and gel strength to suspend cutting and weight materials. |
|
