DEVELOPMENT OF AN INTELLIGENT CONTROL STATION FOR ROD PUMPS

Abstract

The relevance. One of the main methods of oil artificial lift is the use of sucker rod pumping units, which appeared more than 100 years ago and are still widely used. However, a number of problems arise during oil production with sucker rod pumps: increased power consumption, low values of efficiency and power factor of the induction electric motor, malfunctions of downhole and surface equipment. Diagnostics of malfunctions and control of the operation of downhole pumping units are difficult due to the large number of wells and their dispersion over vast areas. The introduction of intelligent control stations for borehole pump units allows diagnostics and control automatically with transmission of the results to the control room. The use of wattmetering and dynamometering systems allows timely identification of developing defects in oil production equipment, the downhole controller adjusts the operating mode in order to ensure the required well flow rate with minimal power consumption. The main aim of the research is to investigate the functions of modern intelligent borehole pump control stations for oil production; formulate the basic requirements for intelligent control stations, for downhole controllers; define the main functions in the field of analysis of dynamometer cards and watt-meter cards of sucker rod pump units. Objects: oil production wells, control stations for downhole sucker rod pumping units, well controllers, control algorithms. Methods: multiobjective optimization methods, mathematical methods for the analysis of wattmeter cards and dynamometer cards, the theory of automatic control. Results. A downhole controller, an intelligent control station, and an algorithm for controlling the electric drive of a downhole pumping unit have been developed. The control station has the functions of measuring and analyzing dynamometer cards and wattmeter cards, diagnostics of the state of oil production equipment, and allows optimization of well operation modes by several parameters.

Keywords

• oil well
• sucker rod pump unit
• intelligent control station
• multi-criteria optimization
• well controller
• specific power consumption