Abstract

This document will define procedures to evaluate cables used with electrical submersible pumps (ESP). A standard rating system based on the performance results will be advanced. This system of scoring will Penn it the selection of a safe and suitable cable for the environmental requirements of a well. It is not the intent of this publication to specify what cable should be used or in any way set up publication to specify what cable should be used or in any way set up a series of requirements that must be met before a cable may be run in a well.

This procedure will describe the evaluation techniques in detail. establish a standard reporting form for results. and set forth a rating system for each type of cable. The procedures outlined here are for samples of generic cable types. The prescribed evaluations are best done in a controlled environment by an independent laboratory.

Unlike test procedures whose objective is to qualify whether a cable works or not, the objective of this research is to quantify the performance degradation in various conditions. performance degradation in various conditions

Introduction

The installation of electrical cables in the harsh environment of downhole producing well appears very unusual to individuals not familiar with the application. Everything that is detrimental to the performance of electrical cable exists in wells. Some of these performance of electrical cable exists in wells. Some of these problem conditions are moisture, temperature, mechanical abuse, problem conditions are moisture, temperature, mechanical abuse, hydrocarbons and various contaminants such as salts, sulfur, and carbon dioxide.

The success that has been achieved using cables in this environment is phenomenal. The manufacturers have done an excellent job developing materials and a configuration that operates in many of these environments.

However, like many other engineering problems, there are tradeoffs that must be made between optimum designs for different applications. An understanding of the most economic cable for a particular application has eluded the producer and cable particular application has eluded the producer and cable manufacturer.

The IEEE has produced Recommended Practices for minimum cable manufacturing performance of the most common designs. The API established a committee to develop recommended practices for cable application.

However, both these endeavors have encountered problems in making recommendations for the user concerning which cable structure is most appropriate for a given application. Because of these problems the Power Application Research Center (PARC) at the University of Tulsa embarked on developing guidelines for use by the application engineers. The work reported here presents the preliminary procedure developed by the PARC faculty. The preliminary procedure developed by the PARC faculty. The procedure is to be used to test performance of different cable procedure is to be used to test performance of different cable constructions under different operating conditions. It is not the intent of this publication to specify what cable should be used or in any way set up a series of requirements that must be met before a cable may be run in a well.

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