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

Table 1

The viscosity under different rotational speed.

Speed/Rpm	Shear rate/S^−1	Viscosity/cP
		1% XC	1% CMC	1% PAC	0.5% XC + 0.5% CMC	0.5% XC + 0.5% PAC	0.5% CMC + 0.5% PAC
600	1021	56.7	49.8	88.0	58.0	66.1	68.6
300	511	88.1	72.7	135.9	90.1	103.4	108.7
6	10	1987.5	244.8	753.9	1018.2	949.7	616.8
3	5	3661.7	274.1	900.7	1703.6	1409.9	744.1
1	1.7	10045.2	352.5	1233.6	3759.6	2526.0	998.7
0.5	0.85	18093.1	587.0	1409.9	6226.9	3877.1	1174.9