Dual-phase extraction is commonly requested by clients of ReRem Equipment Corp where tighter formations or large water-lift require higher applied vacuum (>15″ Hg).
Test systems may include liquid-ring pump, water separation, phase separator and metering. A droptube (straw) is positioned within the well, a mixture of total fluids (liquid & vapor) is extracted to a known elevation for surface treatment. Poly-phase media (oil, water, solids, vapors) add to the separation requirements and complexity.
An alternative technoloy is ‘Vacuum Enhanced Groundwater Extraction’, or VEGE. In this test groundwater is lowered to a known elevation and a stepped-vacuum is applied. Induced vacuum and water extraction rates are directly measured. Water and vapor streams and kept separate and processed individually.