Description
Filtration control addtive modified polysaccharides (starch) is an efficient pre-gelilating starch, introducing different functional groups to the product itself, thus changing the movement mode and molecular structure of pre-gelilating starch in the material. With resistant to mildew, enhance the cohesive strength of the coating under the condition of high air humidity.
The structure of filtration control addtive modified polysaccharides (starch) belong to carbohydrate and similar to cellulose, and also one of the earliest used filtration controller in drilling fluids. It comes from grains and corns, can not dissolve into water under temperature of 50℃,but can swell if the temperature higher than 55℃ until to translucently gel or colloidal solution.
Filtration control addtive modified polysaccharides (starch) can not only decrease the filtration but also increase the viscosity of filter and the coagulation stability, and can be used in fresh water, sea water and saturated water drilling fluids.
Modified starch easily to ferment during using under low salinity or pH (it has best action in high salinity and pH value higher than 11.5 ). And easily to degrade under temperature higher than 120℃
Application
• Temperature resistance up to 120°C
• Especially suitable for non-dispersed phase systems at high ROP
• Inhibit shale dispersion
• Unaffected by salinity
• Acid-soluble products
Advantages
• Effective with fast drilling non-dispersed systems;
• Help to decrease clay dispersion ;
• Not adversely affected by salinity and plays a role in a wide range of water chemistry.
Typical properties
No. | Item | Standard | Result |
1 | Appearance | White or light yellow powder | White or light yellow powder |
2 | 80mesh | >90% | >99.9% |
3 | pH | 6-8 | 7±0.5 |
4 | Moisture | <8 | 6.2 |
5 | Gelatinization degree | >50 | 78% |
Package
25Kg Sacks
