Wireless Telemetry Through Drill Pipe Waveguide
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Solution Overview
Problem
Current telemetry methods in oil well drilling have not kept pace with the increasing demand for higher data transfer rates, particularly from downhole tools to the surface, and are often capital-intensive and complex.
Innovation Solution
A wireless telemetry tool using a hollow, conductive drill pipe as a waveguide for transmitting electromagnetic signals between the surface and the bottom hole assembly, employing standard modulation techniques and repeaters to achieve high baud rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If mud pulse telemetry is used for communication, then communication between surface and BHA is achieved, but data transfer rate is limited and system complexity increases
Solution Approach 1:
The patent replaces the mechanical mud pulse telemetry system with an electromagnetic wave-based communication system. The drill pipe is transformed from a purely mechanical fluid conduit into an electromagnetic waveguide, allowing wireless transmission of data and power simultaneously. This substitution eliminates the need for complex mechanical pulse generation and detection mechanisms, thereby increasing data transfer rates while reducing system complexity.
Solution Approach 2:
The drill pipe is given dual functionality: it serves both as a mechanical support structure and as an electromagnetic waveguide for communication. By making the drill pipe conductive and utilizing it as a transmission medium for electromagnetic waves, the system achieves multi-functionality, allowing a single component to handle both structural and communication tasks, thus reducing overall system complexity.
2Productivity
If wired drill pipe systems are used for high-speed communication, then data transfer rate increases, but capital cost increases
Solution Approach 1:
The system uses the existing drill pipe infrastructure to serve dual purposes: mechanical support and electromagnetic communication. By making the existing drill pipe conductive rather than replacing it with specialized wired drill pipe, the system achieves high-speed communication capabilities while utilizing already-deployed equipment, thereby reducing capital costs.
Solution Approach 2:
The patent changes the electrical parameter of the drill pipe by making it conductive, transforming it from a non-conductive mechanical structure into an electromagnetic transmission medium. This parameter change enables the drill pipe to function as a waveguide without requiring replacement of the physical infrastructure, thus achieving high data transfer rates at lower capital cost.
3Speed
If electromagnetic signals are transmitted through conductive drill pipe, then communication speed increases, but signal attenuation may occur
Solution Approach 1:
The patent introduces a dielectric fluid as an intermediary medium inside the conductive drill pipe. This dielectric fluid fills the interior space and serves as the primary transmission medium for electromagnetic waves. By using the dielectric fluid rather than transmitting through the conductive pipe wall itself, the system achieves faster communication speeds while minimizing signal attenuation, as the dielectric provides a favorable propagation environment.
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 method enables high-speed, bi-directional communication over long distances with minimal attenuation, offering a simpler, less capital-intensive alternative to existing systems, capable of achieving data rates comparable to wired drill pipe systems.
Implementation Method 1
A signal is transmitted by the transmitter, propagated by the waveguide, and received by the receiver
Data Source
AI summary
The present disclosure relates to a telemetry tool for use in a well. The telemetry tool has a hollow, conductive waveguide through which a non-conductive fluid can flow. A transmitter and a receiver are disposed in the hollow interior of the waveguide, separated by some desired distance. A signal is transmitted by the transmitter, propagated by the waveguide, and received by the receiver.