«Equipment and technologies for oil and gas complex»

Application of CFD and additive technologies within the framework of development of gas dynamic studies and gas dynamic processes in gas separators

UDC: 622.276.53
DOI: -

Authors:

¹ National University of Oil and Gas "Gubkin University", Moscow, Russia

Keywords: gas separator, installation of an electric-powered vane pump, recirculation, gas openings, bench tests, numerical tests, operation of the gas separator in "pump mode" and in "two-flow pump mode", hydrogasdynamic processes in gas separators

Annotation:

This article presents the main results of bench and numerical tests of gas separators used in the production of hydrocarbons using electric driven vane pumps (ESPs). Gas separators are widely used as part of the ESP, however, they have low operating time to failure. Now, there are no precise methods describing the principle of operation of the separator in downhole conditions and methods for selecting a separator that works as part of the entire installation. One of the studied separator designs is mass-produced by the manufacturer, the second is experimental. The gas separators were tested in two modes – single-flow pumping and double-flow pumping. Physical tests were carried out on a developed vertical stand with communicating lines of flaps and an entrance line to the gas separator; numerical studies were performed in the SolidWorks Flow Simulation software package. The possibility of recirculation of liquid from the gas openings back to the intake of the gas separator and from the intake line of the gas separator to the outlet of the gas openings has been experimentally shown. For both separator designs, the liquid supply values are set, at which the liquid from the inlet of the gas openings flows back to the intake of the gas separator and in the opposite direction. The results of computer research conducted in the SolidWorks Flow Simulation software package showed good convergence with the results of bench tests. A schematic diagram of a stand for conducting field tests of gas separators of various designs with the possibility of recirculating the liquid flow, as well as 3D visualization of the calculation in a software package is shown. Conclusions are drawn about the prospects of testing gas separators on a model gas-liquid mixture with the possibility of flow recirculation. This will make it possible to adequately select the gas separator for operation as part of the ESP.

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