EVALUATION OF THE INTER-REPAIR OPERATION PERIOD OF ELECTRIC SUBMERSIBLE PUMP UNITS

Ibrahim Abulfaz Habibov,Sevinj Malik Abasova

doi:10.21303/2461-4262.2020.001105

Ibrahim Abulfaz Habibov, Sevinj Malik Abasova

Open Access

https://doi.org/10.21303/2461-4262.2020.001105

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Abstract

In recent years, in the oil and gas industry of Azerbaijan, the use of electric submersible pumps (SEP) as one of the effective way to increase the level of production of well products. Currently, electric centrifugal pumping units (ECPU) are widely used both on land and in offshore fields. Currently, a total of about 15 % of SOCAR’s oil wells are produced using electric submersible pumping units. ECPU effectiveness is largely determined by both the period of their operation and the frequency of repair and restoration work. It is established that the use of ECPUs contributes to an increase in the service life of equipment and the effectiveness of a mechanized method of oil production. To assess the benefits of the latter, the most important factor is the inter-repair period (Tir) of the equipment. Existing methods for determining the inter-repair period of oilfield equipment are accompanied by large errors, which significantly reduce their reliability. In this regard, the article is tasked with developing a more practical and reliable method for determining the inter-repair period, where the point of change in the nature of the failure rate is adopted as the determining parameter

Highlights

Oil and gas sectors of Azerbaijan are the determining factors of the fuel and energy complex (FEC) of the republic
One of the main parameters characterizing the performance of oil pumping equipment is their interrepair period
In the case when the consequences of failures can be the occurrence of dangerous situations and injuries of staff, existing in the theory of reliability methods for determining the inter-repair period (IRP), based on the analysis and minimization of operating losses, for example [3,4,5], become unacceptable

Summary

Introduction

Oil and gas sectors of Azerbaijan are the determining factors of the fuel and energy complex (FEC) of the republic. The aim of research is development of a new solution in the determination of the inter-repair period (Tir) of electric submersible pumps, using the point of change in the nature of the intensity of their failures. In the case when the consequences of failures can be the occurrence of dangerous situations and injuries of staff, existing in the theory of reliability methods for determining the inter-repair period (IRP), based on the analysis and minimization of operating losses, for example [3,4,5], become unacceptable. The results of numerous experiments and analysis of the evaluation data for the operation of electric submersible pumps (ESP) allow to divide the nature of their intensity into two cases: before the point of intensity breakdown and after. The intensity tipping point t* is determined using the nonlinear corrosion-regression approximation of the empirical intensity functions λ1e (t) and λ (t ), respectively, to the fracture point and after

The point t*

The number of failures in the operating time interval

Findings

Conclusions