CALCULATION OF PARAMETERS OF JET APPARATUS FOR OPTIMAL JOINT WORK MODE WITH INSTALLATION OF ELECTRIC CENTRIFUGAL PUMP

• Main Authors: Diana A. Saracheva, Roza I. Vakhitova, Kamil R. Urazakov
• Format: Article
• Language: Russian
• Published: Tomsk Polytechnic University 2019-10-01
• Series: Известия Томского политехнического университета: Инжиниринг георесурсов
• Subjects: jet apparatus; gas-liquid mixture; annular space; electric centrifugal pump; free gas; ejector; formation fluid; tubing
• Online Access: http://izvestiya.tpu.ru/archive/article/view/2301/2080

The relevance of the research is caused by the need to solve the problem of removal of gas accumulating in the annular space of oil producing wells at the inlet of a submersible centrifugal pump. Excessive amount of free gas in the space between the casing and tubing contributes to formation of hydrate plugs, reducing the dynamic level in the well, as a result of which a supply failure may occur and complete stop of oil production is possible. For pumping free gas, it is proposed to use a jet apparatus for joint operation with an electric centrifugal pump, while it is important to correctly calculate the location of the ejector in the well and the diameter of the nozzle. The aim of the research is to develop and propose a method for calculating the parameters of the jet apparatus for the optimal mode of joint operation with an electric centrifugal pump. Object: jet apparatus for removing annular gas in wells equipped with electrical centrifugal pump installations and high gas factor. Methods. The problem posed was solved on the basis of statistical analysis of production data using information modern methods of processing results. The method of mathematical modeling was used when calculating the basic parameters of the jet apparatus to ensure the optimal mode when working together with the installations of electrical centrifugal pumps. Results. The authors have proposed the mathematical model of an electric centrifugal pump together with a jet apparatus designed for pumping annular gas, as a result of which analytical dependencies are obtained that determine the optimal parameters and calculated values ​​of the jet apparatus that ensure the stable operation of the «electrical centrifugal pump - jet apparatus» system. The authors developed the technique for calculating the location of the ejector in a well operated by an electric centrifugal pump.