Journal of Chemistry / 2015 / Article / Tab 4

Research Article

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

Table 4

The evaluation of sedimentation stability (method of using measuring cylinder).

Initial density/g·cm−3PositionMeasured density/g·cm−3Density difference/g·cm−3Phenomenon

0.865Upper0.8640.002No obvious change