Recommended Practice for Testing of Electric Submersible Pump Cable Systems

API RP 11S6: Recommended Practice for Testing of Electric Submersible Pump Cable Systems

When it comes to ensuring the reliable and efficient operation of Electric Submersible Pump (ESP) systems, the integrity of the cable system is paramount. API RP 11S6 provides an essential framework for professionals to rigorously test these critical components, safeguarding against premature failures and costly downtime in demanding exploration and production environments.

What is API RP 11S6?

Developed by the American Petroleum Institute (API), API RP 11S6, "Recommended Practice for Testing of Electric Submersible Pump Cable Systems," is an authoritative industry standard. Its primary purpose is to establish standardized methodologies and procedures for the testing of ESP cable systems, ensuring their electrical integrity and performance throughout their lifecycle.

Scope & Purpose

This recommended practice governs the comprehensive testing of electric submersible pump cable systems, encompassing both new installations and in-service components. It provides guidance on acceptance testing, maintenance testing, and diagnostic testing to identify and address potential electrical faults. While it focuses on the electrical integrity of the cable and its associated components like connectors and potheads, it does not extend to the mechanical testing of the pump or motor itself.

Who Must Comply?

• • Primary audience: Electrical Engineers, Field Technicians, Maintenance Supervisors, Pump Specialists, and Quality Assurance Personnel involved in the oil and gas industry.
• • Industries affected: Primarily the Oil and Gas Exploration and Production (E&P) sector.
• • Compliance nature: Voluntary, but widely adopted as best practice for ensuring equipment reliability and safety.
• • Enforcement: Compliance is typically driven by company policies, contractual requirements, and industry best practices, often verified during project commissioning or operational audits.

Key Requirements Overview

API RP 11S6 outlines a proven approach to cable system assessment:

• • The standard requires meticulous visual inspection of all cable components, including armor, jacket, insulation, conductors, and connectors, to identify any physical damage or anomalies.
• • Professionals must ensure proper cable system preparation, including safe isolation and grounding, before conducting any electrical tests.
• • Key provisions include detailed procedures for acceptance testing of new cable assemblies to verify they meet design specifications and industry standards.
• • The standard mandates regular maintenance testing to monitor the electrical health of installed cable systems and detect degradation over time.
• • It provides methodologies for diagnostic testing to accurately pinpoint the location and nature of electrical faults within the cable system.
• • Specific test types, such as insulation resistance and high potential (Hi-Pot) tests, are detailed to assess dielectric strength and insulation integrity.

Related Standards & References

API RP 11S6 works in conjunction with other industry standards to provide a holistic approach to ESP system management. It complements standards like API RP 11S1, which covers the general design and operation of ESPs, and other electrical safety standards that provide broader guidance on high-voltage equipment handling and safety protocols. Together, these documents ensure a robust framework for the reliable deployment and maintenance of critical production equipment.