METHOD FOR TRANSPORTATION OF FLUID BY MEANS OF SCREW PUMP AND SCREW PUMP Russian patent published in 2022 - IPC F04C14/08 F04C2/16 

FIELD: transportation.

SUBSTANCE: group of inventions relates to a method for transportation of fluid by means of a screw pump. In the method, actuation of at least one drive screw (5) of screw pump (1) is performed by means of asynchronous engine (10). Asynchronous engine (10) operates at the first set frequency. A gas-liquid mixture is transported as fluid (45). After fulfillment of a condition of frequency change, asynchronous engine (10) operates at the second set frequency reduced relatively to the first set frequency. A measured characteristic depending on a liquid fraction in fluid (45) is determined. Fulfillment of the condition of frequency change depends on the measured characteristic. The first set frequency is at least 10% or at least 20% greater than a boundary frequency of asynchronous engine (10), at which, with set maximum operating voltage, an area of field weakening begins.

EFFECT: group of inventions is aimed at reduction in technical costs for provision of operation of a screw pump.

10 cl, 5 dwg