Technical requirements for unidirectional pressure sealing agents for drilling fluids:
£¨Q/SHCG52-2013£©
project |
Indicators |
Appearance |
Light yellow or grayish yellow powder |
Density£¬g/ cm3 |
1.45-1.65 |
Burning residue£¬% |
¨Q7.0 |
Sieve residue£¬% |
¨Q10.0 |
Drying loss£¬% |
¨Q10.0 |
PH value |
6-8 |
Apparent viscosity£¬mpa¡¤g |
6-9 |
Reduction rate of closed filtration loss£¬% |
¨R70 |
Measurement value tolerance£º
project |
Allow the difference in repeatability measurement values |
Allow the difference in reproducibility measurement values |
Density£¬g/ cm3 |
0.05 |
0.1 |
Burning residue£¬% |
0.2 |
0.4 |
Sieve residue£¬% |
0.5 |
1.0 |
Drying loss£¬% |
0.5 |
1.0 |
PH value |
0.2 |
0.4 |
Apparent viscosity£¬mpa¡¤g |
1 |
2 |
Reduction rate of closed filtration loss£¬% |
3 |
4 |
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