Increasing the Time between Failures of Electric Submersible Pumps for Oil Production with High Content of Mechanical Impurities

Dmitriy Shishlyannikov,Valeriy Zverev,Ivan Zvonarev,Anna Ivanchenko

doi:10.3390/app12010064

Dmitriy Shishlyannikov, Valeriy Zverev + Show 2 more

Open Access

https://doi.org/10.3390/app12010064

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Abstract

The main principles of hydroabrasive wear of parts of the pumping stages of well’s electric submersible pumps are considered in this article. The concentration, grain-size distribution and shape of solid particles have the greatest impact on the abrasion ability of particles of mechanical impurities interacting with the parts of pumping equipment. The implementation of filters is the most effective and affordable way to protect borehole electric submersible pumps from hydroabrasive wear. Filters reduce the concentration and decrease the average grain-size of mechanical impurities going through the pumping stages. The authors propose variants of constructive and schematic solutions of self-cleaning slot filters, providing an increase in the operating time of electric centrifugal pump units during production of well fluid with a high content of mechanical impurities. The operating principle of the proposed filters is described. The results of calculations of deformation of tubing string during the increase in pressure at the oil wellhead are presented, confirming the possibility of restoring the permeability of spring filter elements without lifting the pump unit to the surface.

Highlights

Academic Editors: Stefan Vöth, Electric submersible pumps (ESP) are currently the mostly widely used installations at Russian oil fields
The peculiarities of hydroabrasive wear of pumping stages of ESP units are analyzed in the article
It is shown that the process of destruction of parts of an ESP operating in conditions characterized by a high content of mechanical impurities in the pumped fluid is multifactorial and develops locally in areas in which abrasive particles are concentrated

Summary

Introduction

Academic Editors: Stefan Vöth, Electric submersible pumps (ESP) are currently the mostly widely used installations at Russian oil fields. Forces co-directional to the rotation of the impeller and caused by the friction of the liquid against the bottomofdisk of thewear impeller; Intensive development abrasive of the guide apparatus of the VNN5A-100 pumping stage in area 1 is determined by the impact of particles of mechanical impurities. The fluid containing the particles of mechanical impurities flows from the pumping stage into the previous stage along the direction of the flow and destroys the impeller thrust washers This process develops most intensively at higher rotation velocities of the drive shaft of the ESP (≈6 thousand rpm), which causes the destruction of impellers, i.e., the cutting of disks and their separation from the hub sleeve.

Methods for ESPs of Producing

Analysis of the forparticles

Analysis of the Protection Methods for ESPs Producing Well Fluid with High

Borehole

Findings

Conclusions