Inductive Coupler Alignment Mechanism for Downhole Well Tools
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Solution Overview
Problem
The efficiency of inductive couplers in wells is hindered by alignment challenges due to equipment tolerances, leading to inefficient energy transfer and potential energy dissipation.
Innovation Solution
A mechanism is provided that includes a first and second inductive coupler section with a feedback system to ensure precise alignment, utilizing a snap latch connector assembly and other mechanical feedback mechanisms to indicate alignment at the surface, allowing for the locking of a contraction joint until alignment is confirmed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the coil of one inductive coupler is made significantly longer than the other coil, then inductive coupling can be ensured, but excessive energy is dissipated due to electromagnetic field straying outside the shorter coil
Solution Approach 1:
The patent employs a feedback mechanism where a sensor detects the alignment status of the two inductive couplers and provides mechanical feedback to the surface. This feedback system allows operators to adjust the positioning of the equipment sections to achieve optimal coil alignment, thereby ensuring reliable inductive coupling without requiring one coil to be significantly longer than the other, thus preventing energy dissipation.
2Manufacturing precision
If standard equipment tolerances are used without alignment mechanisms, then device complexity is reduced, but precise alignment of inductive couplers cannot be achieved
Solution Approach 1:
The patent utilizes visual indicators (analogous to color changes) where mechanical feedback mechanisms provide visible or detectable signals at the surface indicating the alignment status of the inductive couplers. This allows operators to achieve precise coil alignment without requiring complex automated alignment systems, thereby maintaining relatively simple device architecture while ensuring manufacturing precision.
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
This approach enhances the efficiency of inductive coupling by ensuring accurate alignment of inductive couplers, reducing energy dissipation and improving power and data transmission between downhole components.
Implementation Method 1
A time-varying current typically is communicated through the one of the coils, which causes a time-varying electromagnetic field to be generated, which induces a corresponding current in the coil of the other inductive coupler.
Data Source
Figure 1A
Figure 1B
Figure 1C
AI summary
An apparatus that is usable with a well includes a first equipment section that includes a first inductive coupler and a second equipment section that includes a second inductive coupler. The second equipment section is adapted to be run downhole into the well after the first equipment section is run downhole into the well to engage the first equipment section. A mechanism of the apparatus indicates when the first inductive coupler is substantially aligned with the second inductive coupler.