Azimuthal Wellbore Casing Corrosion Sensor
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing tools for detecting wellbore casing corrosion provide only circumferentially averaged measurements, lacking detailed azimuthal information necessary for comprehensive assessment of casing condition.
Innovation Solution
A wellbore casing corrosion measurement tool featuring a sensor assembly with multiple electromagnetic fields arranged about its circumference to induce eddy currents in the casing, allowing for the detection of magnetic fields indicative of the casing's condition, and enabling focused investigation of different azimuthal sectors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If circumferentially averaged measurements are used, then measurement simplicity is improved, but measurement precision deteriorates due to loss of azimuthal information
Solution Approach 1:
The tool divides the casing inspection into multiple discrete azimuthal sectors around the circumference. Each sector is independently measured and reported, allowing identification of localized corrosion positions. This segmentation transforms a single averaged measurement into multiple directional measurements without requiring complex additional hardware beyond the basic electromagnetic sensor array.
2Measurement precision
If multiple electromagnetic fields are used to improve measurement precision, then device complexity increases
Solution Approach 1:
The electromagnetic sensor assembly is designed to perform multiple functions: it generates electromagnetic fields to induce eddy currents in the casing, detects the resulting magnetic fields, and provides measurements for multiple azimuthal sectors. This multi-functionality reduces the need for separate dedicated components for each measurement task, thereby limiting the increase in device complexity while achieving precise azimuthal resolution.
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
The tool provides accurate azimuthal information on casing condition, enabling informed decisions on well maintenance and intervention by distinguishing between uniform metal loss and localized severe corrosion.
Implementation Method 1
The control circuitry is configured to energize selected components of the sensor assembly to produce multiple electromagnetic fields that are arranged about a circumference of the sensor assembly to induce eddy currents in at least one wellbore casing string
Implementation Method 2
detect magnetic fields resulting from the eddy currents in the at least one wellbore casing string via the sensor assembly, said magnetic fields being indicative of a state of the at least one wellbore casing string
Data Source
AI summary
Disclosed herein is a wellbore casing corrosion measurement tool, including a sensor assembly and control circuitry. The control circuitry is configured to energize selected components of the sensor assembly to produce multiple electromagnetic fields that are arranged about a circumference of the sensor assembly to induce eddy currents in at least one wellbore casing string, and detect magnetic fields resulting from the eddy currents in the at least one wellbore casing string via the sensor assembly, said magnetic fields being indicative of a state of the at least one wellbore casing string.