| 1. Brief Introduction
Non-fluorescence Anti-sloughing and Filtrate Reducer for Drilling Fluid researched and developed by UPC (China University of Petroleum) has been extensively applied in local major oilfields and well received by clients. It won Second Prize of Shandong Province’s Technology Progress in 1996.
Main Components and Function
PA-2 is the graft copolymer of potassium humate and cationic monomer. The introduction of positive ion enhances the capacity of anti-sloughing and filtration loss, and especially improves the effect of drilling fluid viscosity reduction.
2. Technical Specifications
Table 1 Physical and chemical properties
|
Item
|
Specification
|
|
Appearance
|
Free-flowing black powder and particles
|
|
Water Cut，%
|
≤10.0
|
|
Sieve Residue (mesh size0.84mm) %
|
≤5.0
|
|
pH
|
7～11
|
|
Relative Expansion Rate
|
≤60
|
|
Florescence Level
|
≤3
|
Table 2 Drilling Fluid Performance
|
Item
|
Specification
|
|
API FL，mL
|
Under room temperature≤10.0
150℃/16h ≤25.0
|
|
Apparent Viscosity, mPa•s
|
≤10.0
|
3. Application
The product with 180℃ tolerance is suitable for all kinds of fresh water drilling fluid system and also can be used with other salt-resisting additives in brine drilling fluid system.
It is mainly used as drilling fluid filtrate reducer and has the capacity of viscosity reduction and anti-sloughing. With low florescence, it is available in exploratory well.
4. Usage and Dosage
This product can be added directly to any water-based drilling fluid system. The initial recommended amount is 1%~2% of circulating mud.
5. Packaging and Storage
It is packed in paper/plastic sacks of 25kg net weight each and stored in cool, dry and ventilated places.
Guarantee period is 1 year
7. Environment and Safety
This product is non-toxic and harmless to human and environment. No need for special attention when using. Avoid contacting with eyes, skin and clothes, otherwise wash with plenty of water. No swallowing
| 
