Pumping process for operating a multi-phase screw pump and pump
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United States of America Patent
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Apr 29, 1997
Grant Date -
N/A
app pub date -
Oct 6, 1995
filing date -
May 19, 1993
priority date (Note) -
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Abstract
The invention relates to a pumping process for operating a multi-phase screw pump with at least one feed screw surrounded by a housing having at least one inlet on one side and at least one outlet at its top, in which the intake medium is conveyed parallel to the screw shaft in a continuous low-pulsed stream and continuously discharged at the outlet. This invention also relates to a multi-phase screw pump. In order to prevent the drawbacks usually occurring in dry running phases, the invention proposes that a partial liquid volume flow (liquid circulation) be separated on the pressure side and returned in metered quantities into the intake regions and thus kept in circulation.
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