normal align=center>钻井液用重晶石粉质量标准

normal align=center>项   目

normal align=center>指标

normal align=center>特级

normal align=center>一级

normal align=center>二级

normal align=center>            密度g/cm3                         ≥

normal align=center>4.30

normal align=center>4.20

normal align=center>4.05

normal align=center>细度%

normal align=center>0.074 mm孔径筛筛余量  ≤

normal align=center>3.0

normal align=center>3.0

normal align=center>3.0

normal align=center>0.043 mm孔径筛筛余量  ≥

normal align=center>5.0

normal align=center>5.0

normal align=center>5.0

normal align=center>水溶性碱土金属（以钙计）mg/kg    ≤

normal align=center>150

normal align=center>200

normal align=center>250

normal align=center>粒度效应

normal align=center>mPa.s

normal align=center>     加硫酸钙前       ≤

normal align=center>110

normal align=center>125

normal align=center>140

normal align=center>     加硫酸钙后       ≤

normal align=center>110

normal align=center>125

normal align=center>140