OIL FILED

Variable frequency drives for oil pumps. Nowadays a lot of attention is paid to the possibility of using variable frequency drives for pumps, and especially for main pumps at oil pumping stations.
The main advantages of the frequency control for main pumps are cost-effectiveness and smoothness of the regulation of pumping modes. Additional positive factors of application of a frequency-controlled drive are: reducing the number of switching-on. Number of shutdowns of main pumps is reduced and smooth regime of pumping is provided. It leads to a decrease of pressure waves in pipelines both in the transition from one process mode to another and reduces number of unstable process modes. Therefore, this increases: the residual resource of the main oil pipeline; reduces the risk of pipeline breaks and environmental pollution by pumping products; allows smoothly reduce the pressure at the outlets of intermediate oil pumping stations to the level of minimum pressures established by the technological parameters of the pipeline; allows eliminate throttling and partially abandon the use of interchangeable rotors at oil pumping stations.