Improving the Efficiency of Curved Wells’ Operation by Means of Progressive Cavity Pumps

Anatoliy Andreevich Isaev, Mekhrali Mirzali Ogly Aliev, Alexander Nikolaevich Drozdov, Yana Alekseevna Gorbyleva and Karina Shamilyevna Nurgalieva
Additional contact information
Anatoliy Andreevich Isaev: Sheshmaoil Management Company LLC, 423458 Almetyevsk, Russia
Mekhrali Mirzali Ogly Aliev: Department of Oil and Gas Equipment and Engineering Technology, Almetyevsk State Oil Institute, 423458 Almetyevsk, Russia
Alexander Nikolaevich Drozdov: Department of Mineral Developing and Oil & Gas Engineering, Peoples’ Friendship University of Russia, 117198 Moscow, Russia
Yana Alekseevna Gorbyleva: Department of Mineral Developing and Oil & Gas Engineering, Peoples’ Friendship University of Russia, 117198 Moscow, Russia
Karina Shamilyevna Nurgalieva: Department of Development and Operation of Oil and Gas Fields, Saint-Petersburg Mining University, 199106 St. Petersburg, Russia

Energies, 2022, vol. 15, issue 12, 1-14

Abstract: This paper proposes a solution to the problem of improving the reliability of the operation of progressive cavity pump units in deviated and directional wells. High dogleg severity significantly contributes to rod breakage; rods often break close to the “elbows” with a dogleg severity of 2 deg/10 m or higher. Statistical analyses were used to identify the frequency of failures and their impact on the reliability of a PCP unit. The design layout and mathematical model for pump rods’ torsional vibrations in the curved section of a wellbore were developed. A simulation of the curved section was performed. This article provides the basic formulas needed to design a rotating rod string using two reduced discs. The creation of an additional crooked section resulted in multiple reductions in the “resonant” rotational speed and rigidity in the mathematical model. Determining the moment of inertia of the reduced discs’ mass made it possible to determine the sucker-rod string’s stiffness, the circular rotation frequency, and the number of sucker-rod revolutions under resonance. The number of reduced discs on the sucker-rod string depends on the curvature pattern. In summary, a centralizer for a rotating string was designed to reduce the vibration and shock effects of rods on the tubing.

Keywords: progressive cavity pump; directional wellbore profile; sucker-rod string; reduced disc; centralizer (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

Downloads: (external link)
https://www.mdpi.com/1996-1073/15/12/4259/pdf (application/pdf)
https://www.mdpi.com/1996-1073/15/12/4259/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:15:y:2022:i:12:p:4259-:d:835400

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().