Elasticity Polymer Microspheres Shield blocking Agent

Elasticity polymer microspheres shield blocking agent is based on the principle from inverse suspension polymerization
1.Properties and applications
Elasticity polymer microspheres shield blocking agent is based on the principle from inverse suspension polymerization.It has a good anti-collapse effect,which can inhibit the hydration dispersion of clay; And also prevent water-sensitive from damaging oil layer. This product has good elasticity that will change under the impact of the pressure difference to adapt to pores with different shapes and sizes. It will bring good sealing to big pores produce, and reduce the drilling fluid filtration of the oil layer. It is the agent that provides protection over the oil layer among the drilling fluid.
2. Technological Index
The main technological Index
Item
Index
Appearance
Gel-like with no color or light yellow
Water dispersion
Dispersion
Increase amount of appearance viscosity, mPa.s
≤5.0
Reduction amount of API filtration loss with (150°C/16h),mL
≥5.0
Filtration loss under high temperature and high pressure(150°C/3.5MPa),mL
≤30
Increase rate of Shale recycling ,%
≥70.0
Granularity (2.5~120),μm
≥80%
3.The use method and notice:
It can be added directly into drilling fluid . It has good hydration inhibiting properties on shale, and has some effect on fluid loss and has little effect on appearance viscosity. The recommended amount for the first time is 0.5%~2% of the total circling mud amount .