Electromagnetic Drill Pipe Coupler for Misalignment-Tolerant Data Links
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Solution Overview
Problem
Existing data transmission systems in downhole environments, such as drilling operations, face challenges in achieving reliable and high-speed bi-directional data communication due to electrical losses and angular misalignment of drill pipes, with existing solutions like magnetic coupling limited by data rates and reliability issues.
Innovation Solution
The development of an electromagnetic coupler using non-magnetic, electrically conductive housings and dielectric structures to establish an electromagnetic communication link between drill pipes, allowing for high data rate transmission over a wide range of angular rotations without magnetic materials, reducing transmission losses and maintaining signal integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If magnetic coupling is used for data transmission between drill pipes, then data communication can be established, but the data rate is limited to about 50 kbits/s and reliability is reduced
Solution Approach 1:
The patent replaces magnetic coupling with capacitive coupling using dielectric structures. Instead of using magnetic fields for signal transmission, the invention employs electric fields stored in dielectric materials (such as ceramic capacitors) to couple signals between adjacent drill pipes. This substitution eliminates the limitations of magnetic coupling, enabling data rates up to 50 Mb/s while maintaining reliable communication through the drill string.
2Adaptability or versatility
If drill pipes are connected at various angular orientations, then operational flexibility is improved, but signal transmission quality deteriorates due to misalignment
Solution Approach 1:
The patent changes the coupling mechanism from magnetic to capacitive, which fundamentally alters how signals are transmitted between pipes. Capacitive coupling through dielectric structures is insensitive to angular misalignment because the electric field coupling occurs through the dielectric material between the pipes rather than requiring direct magnetic field alignment. This parameter change enables reliable signal transmission even when pipes are connected at various angles during drilling operations.
3Reliability
If electrical connectors are used to join transmission line sections, then data transmission can be achieved, but transmission losses increase and reliability decreases
Solution Approach 1:
The patent extracts the electrical connector from the system entirely by using capacitive coupling through dielectric structures. Instead of making direct electrical contact between pipe sections, the invention uses the dielectric material between adjacent pipes as the coupling medium. This eliminates contact resistance, corrosion issues, and mechanical connection failures that plague traditional electrical connectors, while also reducing transmission losses by providing a stable, consistent coupling interface.
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 solution enables reliable, high-speed data transmission at rates up to 50 Mb/s, independent of angular orientation, with reduced transmission losses and improved reliability, suitable for high-speed drill pipe telemetry systems.
Implementation Method 1
Each coupler comprises: a first non-magnetic, electrically conductive housing adapted to be mounted at an end of the first component; a first electrically conductive structure; a first structure of dielectric material; a second non-magnetic, electrically conductive housing adapted to be mounted at an end of the second component; a second electrically conductive structure; and a second structure of dielectric material
Implementation Method 2
The development of an electromagnetic coupler using non-magnetic, electrically conductive housings and dielectric structures to establish an electromagnetic communication link between drill pipes
Data Source
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AI summary
Coupler for coupling a first and a second section of a transmission line (65) embedded in a first and a second component (2, 3) respectively, the said coupler comprising: -a first half-coupler (40a) comprising a first non-magnetic, electrically conductive housing (61a); a first electrically conductive structure (82a); and a first structure of dielectric material (81a, 83a); -a second half-coupler (41a) comprising a second non-magnetic, electrically conductive housing (62a); a second electrically conductive structure (88a); and a second structure of dielectric material (87a, 89a). The first section of the transmission line (65), respectively the second section, is electrically connected to the first conductive structure (82a), respectively the second conductive structure (88a). When the first and second components are connected end-to-end, the first and second housings come into contact to form together an electromagnetic cavity inside which the first and second conductive structures are separated from each other by the first and second dielectric structures, so as to allow the first and second conductive structures to be in electromagnetic communication with each other.