Application

1. can measure permeability variation of coal core in anisotropic condition;
2. can measure flow performance of drilling fluid and permeability variation of coal core before and after being polluted by drilling fluid under true triaxial stress;
3. can simulate drilling fluid dynamic damage when drilling under positive differential pressure, prevent stress effect caused by setting up coal core many times and make coal reservoir pollution and filtration test integrate;
4. can measure permeability of coal core in three-dimensional directions and evaluate its anisotropic characteristics;
5. applied to gas-liquid permeability test.

Key Technical Parameters

1. oven: 2500×850×1750 mm³

volume of work case: 1500×700×750 mm³, its inner surface is stainless steel and exterior is PVC cover;

2. operating temperature: ambient temperature～150℃; accuracy: ±2℃;
3. velocity range: 0.001ml/min～40 ml/min;
4. operating pressure : 0～50MPa; maximum pumping pressure: 69 MPa;
5. accuracy of measuring pressure: ±2% of the full scale;
6. gas pressure: 0～30MPa.