Borepath Analyzer Frequency Selection
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Solution Overview
Problem
Horizontal directional drilling operations face interference from external sources, disrupting communication between the subsurface beacon and the surface receiver, making it difficult to accurately track the drill bit's location and steer the borepath.
Innovation Solution
A method and system that measure interference at multiple frequencies along the borepath, determine a preferred frequency with minimal interference, and adjust the beacon and tracker to operate at that frequency for effective communication and location tracking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed frequency is used for beacon-tracker communication, then the communication system is simple to operate, but external interference at that frequency disrupts communication reliability
Solution Approach 1:
The system performs preliminary frequency analysis by measuring interference levels at multiple frequencies along the borepath before drilling begins. The tracker identifies and stores the optimal frequency with minimal interference in advance, so that during drilling operations, the beacon and tracker can communicate reliably without real-time frequency adjustments.
2Reliability
If interference measurement is performed at multiple frequencies, then the optimal frequency can be identified, but the time and resources required for analysis increase
Solution Approach 1:
The system measures interference at a plurality of different frequencies (excessive action) to ensure comprehensive coverage of the frequency spectrum. By measuring more frequencies than strictly necessary, the system guarantees identification of the optimal frequency while the measurements are performed efficiently during the preliminary setup phase rather than during critical drilling operations.
3Reliability
If the beacon signal strength is increased to overcome interference, then communication reliability improves, but energy consumption increases
Solution Approach 1:
Instead of increasing signal strength, the system changes the frequency parameter of the beacon signal to match the optimal frequency identified during preliminary interference analysis. By operating at the frequency with minimal external interference, the beacon maintains reliable communication at lower power levels, avoiding the energy waste of transmitting at higher powers through interfered frequencies.
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
Enhances communication reliability and accuracy by selecting the optimal frequency for beacon-tracker communication, reducing interference and enabling precise tracking and steering of the drill bit along the desired borepath.
Implementation Method 1
an antenna to detect a beacon signal at a plurality of different frequencies
Data Source
AI summary
A tracker used to analyze a desired borepath prior to horizontal directional drilling operations. The tracker analyzes an amount of interference present at a plurality of different frequencies at multiple locations along the borepath and maps a plot of the interference at the different frequencies. The lower the point on the plot, the less interference present at that frequency at the location analyzed. The tracker summarizes the overall interference along the desired borepath for the different frequencies analyzed and will recommend a preferred frequency. An operator may program the beacon prior to boring operations to emit a beacon signal at the preferred frequency. The operator may also tune the tracker to receive the preferred frequency. The tracker and beacon may then communicate during boring operations at the preferred frequency in order to detect the position of the beacon underground relative to the tracker.