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Well operation by plunger rod pumps in difficult conditions

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Category: Content №1 2025

Last Updated on 25 February 2025

Published on 30 November -0001

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Authors:

A.Togasheva, orcid.org/0000-0002-5615-2711, Caspian University of Technology and Engineering named after Sh. Yessenov, Aktau, the Republic of Kazakhstan

R.Bayamirova*, orcid.org/0000-0003-1588-3144, Caspian University of Technology and Engineering named after Sh. Yessenov, Aktau, the Republic of Kazakhstan, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

B.Ratov, orcid.org/0000-0003-4707-3322, Satbayev University, Almaty, the Republic of Kazakhstan, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

A.Sudakov, orcid.org/0000-0003-2881-2855, Dnipro University of Technology, Dnipro, Ukraine

A.Makyzhanova, orcid.org/0000-0001-7704-9679, Satbayev University, Almaty, the Republic of Kazakhstan

^* Corresponding author e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

повний текст / full article

Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu. 2025, (1): 022 - 027

https://doi.org/10.33271/nvngu/2025-1/022

Abstract:

Purpose. Research and optimization of the processes of operation of wells equipped with plunger rod pumps in conditions with increased complexity, such as high oil viscosity, high pressure, aggressive geological and physical conditions and significant fluctuations in flow rate, in order to increase the efficiency and reliability of the plunger rod pump (UPSH) installation, increase well productivity and reduce operating costs.

Methodology. The authors used the following scientific methods: the method of analysis and synthesis – for a review and systematization of existing scientific publications and experiments on the operation of wells with UPR in conditions of increased complexity; the method of observation and data analysis – for an analysis of the operation of UPR in various conditions, including the study of the effectiveness of their work in difficult geological conditions; experimental methods – for conducting field experiments to evaluate the work of UPSH in conditions of increased complexity.

Findings. The use of inhibitors, tubing (tubing and compressor tubes) with protective coating, rod centralizers and special pumps is proposed to combat wiping and deposits in deep pumping equipment. Low-cost options are recommended for use in small and medium-sized wells up to 1,500 m deep, providing an efficiency of 50‒60 % with a viscosity of up to 200 MPaˑs and a sand content of up to 10 %.

Originality. The theory of the causes of the failure of the GNR and the downtime of the mechanized fund of production wells equipped with UPSH has been further developed. The influence of complicated conditions on the operational characteristics of plunger rod pumps has been established. The use of OPN in production wells at the Uzen field is justified, taking into account technical and economic factors in comparison with other methods of operation.

Practical value. The development and implementation of methods that increase the inter-repair period of wells at the Uzen field make it possible to reduce the cost of repair and preventive maintenance, increase the efficiency of operation and reliability of the mining complex, especially at a late stage of field development. As a result of the pilot tests conducted, the average duration of the inter-repair period of the mechanized fund in 2021 increased by 14 days compared to 2018.

Keywords: submersible rod pump, paraffin deposits, well, bottom-hole pressure

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