Downhole Pipe Tracer Layer for Continuous Corrosion Detection

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Solution Overview

Problem

Existing wireline monitoring methods for detecting corrosion in downhole equipment are costly and require long downtimes, providing low-frequency and inaccurate assessments of metal loss in pipes.

Innovation Solution

Incorporating a tracer layer with metallic tracers into downhole equipment, such as pipes, that releases tracers into the formation upon corrosion, allowing for continuous monitoring and detection through surface sampling of formation fluids, utilizing porous silica materials and polymers responsive to iron ions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If wireline detection methods are used to monitor corrosion, then corrosion detection capability is provided, but operational downtime increases and cost increases

Engineering Contradiction:

Improvecorrosion detection capabilityVSAvoidoperational downtime

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The downhole equipment incorporates self-monitoring capabilities through embedded tracer layers and sensors that automatically detect and report corrosion conditions. The tracer layer releases detectable particles when corrosion occurs, and sensors continuously monitor pipe wall thickness, enabling the system to self-diagnose corrosion without requiring external wireline intervention.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The patent replaces the mechanical wireline detection system with a chemical/physical tracer-based monitoring system. Instead of mechanically probing the pipe wall with wireline tools, the system uses tracer particles embedded in the pipe wall that release upon corrosion, allowing detection through fluid sampling and analysis rather than mechanical measurement.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Reliability

If wireline detection methods are used to monitor corrosion, then corrosion detection capability is provided, but cost increases

Engineering Contradiction:

Improvecorrosion detection capabilityVSAvoidcost

Core Design Contradiction:

ReliabilityVSLoss of energy

Solution Approach 1:

The patent employs inexpensive tracer particles embedded in the pipe wall that serve their purpose once corrosion occurs. These tracers are simple, low-cost materials (such as metal flakes or magnetic particles) that can be easily manufactured and incorporated into the pipe structure, replacing expensive wireline detection operations with a one-time, low-cost embedded monitoring system.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

Solution Approach 2:

The system eliminates the need for repeated expensive wireline operations by implementing a self-monitoring mechanism where the pipe itself contains the detection capability through embedded tracers and sensors, converting a recurring high-cost service into a one-time low-cost embedded system.

Inventive Principle:

Principle #25Self-service

3Loss of information

If wireline detection is used, then average metal loss can be detected, but measurement precision is limited

Engineering Contradiction:

Improvemetal loss detectionVSAvoidmetal loss measurement accuracy

Core Design Contradiction:

Loss of informationVSMeasurement precision

Solution Approach 1:

The patent transitions from measuring average metal loss over a large area to detecting localized corrosion events. The tracer layer is embedded at specific locations within the pipe wall, and when corrosion occurs at those specific points, tracer particles are released. This allows detection of localized corrosion conditions rather than providing only an averaged measurement across the entire pipe section.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent employs tracer particles with distinct physical or magnetic properties that change or become detectable when released from the pipe wall due to corrosion. These tracers can be detected through magnetic sensors, optical detection, or other analytical methods, providing precise information about the presence and location of corrosion events.

Inventive Principle:

Principle #32Color changes

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

Enables timely and accurate detection of corrosion with reduced operational downtime and cost, utilizing continuous monitoring and scalable porous silica materials to detect corrosion levels and integrity issues in downhole equipment.

Implementation Method 1

Corrosion in downhole equipment (e.g., production tubing, casing, pipe) is a process where the metal surface of the downhole equipment converts to an oxide. For example, iron oxides are formed when iron metal reacts with water

Methodology Applied

Scientific EffectCorrosion: Oxidation

Implementation Method 2

releasing the tracer particles from the tracer layer into the formation upon interaction of metal ions with the tracer layer

Methodology Applied

Scientific EffectIon interaction: Ion Repulsion/Attraction

Data Source

PatentUS12516599B2Monitoring corrosion in downhole equipment

Publication Date: 2026.01.06 SAUDI ARABIAN OIL CO

AI summary

Methods for detecting a corrosion in downhole equipment are described. The methods include incorporating a tracer layer including tracer particles in a piece of downhole equipment; deploying the piece of downhole equipment including the tracer layer into a wellbore; releasing the tracer particles from the tracer layer into the formation upon interaction of metal ions with the tracer layer; and analyzing levels of tracer particles in formation fluids produced to ground surface.