Method of plural zone pumping utilizing controlled individual pump inlet in each zone

摘要

The present invention relates to a pumping method utilizing two suction inlet holes spaced a predetermined distance apart by an extension robe. In a variant, the pumping method utilizes two pump barrels cooperating each with the two inlet holes. In another variant, the pumping method utilizes a pump barrel and control for controlling the flow rates of effluents coming from the two inlet holes. Application of the method is preferable when pumping effluent from subhorizontal drain holes.