Magnetic Permeability Sensor for Cementing Fluid Detection
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Solution Overview
Problem
Current methods for detecting changes in magnetic permeability during fluid operations in well operations, such as reverse cementing, lack precision and efficiency in controlling fluid flow, leading to potential cement ascension into the casing.
Innovation Solution
A downhole tool equipped with a magnetic permeability sensor apparatus that detects changes in magnetic permeability by using high magnetic permeability materials in cementing fluids, triggering an actuator to close a sliding sleeve and prevent cement from ascending, thereby controlling fluid flow effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If magnetic permeability sensor apparatus is used to detect cementing fluids, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent replaces mechanical detection methods with a magnetic permeability sensor apparatus that uses magnetic field interactions to detect cementing fluids. The sensor detects changes in magnetic permeability as cementing fluids (containing magnetite particles) pass through the annulus, eliminating the need for complex mechanical sensing systems while achieving precise detection.
Solution Approach 2:
The patent changes the detection parameter from mechanical properties to magnetic permeability. By introducing magnetite particles into the cementing fluid and using a magnetic sensor to detect permeability changes, the system achieves precise fluid detection through a different physical parameter, improving measurement precision while using a relatively simple sensor apparatus.
2Reliability
If sliding sleeve mechanism is used to control fluid flow, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent extracts the fluid control function from a complex multi-component system and implements it through a simple sliding sleeve mechanism. The sliding sleeve can be moved to open or closed positions to control fluid flow between the annulus and casing, providing reliable control with minimal structural complexity. The sleeve is actuated by magnetic force when cementing fluids are detected, eliminating the need for complex actuation systems.
3Ease of operation
If magnetite particles are added to cementing fluids, then ease of operation is improved, but loss of substance increases
Solution Approach 1:
The patent applies local quality by adding magnetite particles specifically to the cementing fluid portion that needs to be detected, rather than modifying the entire well operation system. The magnetite concentration is optimized to provide sufficient magnetic signal for detection while minimizing the amount of additional material required. The particles remain localized in the cementing fluid column during the operation.
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 solution enables precise control of fluid flow, ensuring cement remains in the annulus and preventing its entry into the casing, enhancing the efficiency and accuracy of well operations.
Implementation Method 1
detecting one or more changes in magnetic permeability of a fluid flow in a wellbore
Data Source
AI summary
Fluid flows, such as slurries, conditioning fluids, spacer fluids, or the like, may be modified to carry materials having high magnetic permeability characteristics that can be detected by a magnetic permeability sensing apparatus positioned along the fluid flow path in wellbores or downhole tools. Sensed presence of the high magnetic permeability material by the sensing apparatus positioned in the fluid flow path may result in initiation of an operational event. The operational event may include, but not limited to closing or opening a valve, moving a component, conveying a signal, activating or deactivating a device, or the like.