Journal of Chemistry / 2015 / Article / Tab 5

Research Article

Polymer Drilling Fluid with Micron-Grade Cenosphere for Deep Coal Seam

Table 5

The evaluation of sedimentation stability (method of using long plastic tube).

Time/h024487296120144

Phenomenon

ResultUpper density (144 h): 0.849 g·cm−3, lower density (144 h): 0.870 g·cm−3