Borehole Telemetry via Electromagnetic Pulse Modulation
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Solution Overview
Problem
Monitoring borehole conditions, such as temperature, pressure, and flow rate, in remote locations is challenging due to the impracticality of wired communication systems in deep boreholes, where existing solutions like modulated reflectance systems face limitations in data transmission and interpretation.
Innovation Solution
An apparatus and method utilizing a transmission line and a probe with an energy storing circuit, pulse generator, and resonant circuit to transmit and modulate electromagnetic signals within the borehole, allowing for the detection and analysis of borehole characteristics through electromagnetic energy storage, pulse generation, and signal modulation, enabling efficient data transmission to the surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wired communication systems are used for monitoring deep boreholes, then data transmission reliability is improved, but system complexity and installation difficulty increase significantly
Solution Approach 1:
The patent replaces wired mechanical communication systems with electromagnetic wave-based wireless communication. The transmitter generates electromagnetic waves that propagate through the borehole, and the receiver captures these waves to decode telemetry data, eliminating the need for physical wire connections in deep boreholes.
Solution Approach 2:
The patent introduces electromagnetic waves as an intermediary medium to transfer information between the downhole instruments and the surface. The electromagnetic waves serve as the carrier that conveys telemetry data through the borehole environment without requiring direct physical connection.
2Ease of operation
If modulated reflectance systems are used for down-hole telemetry, then wireless communication capability is achieved, but data transmission accuracy and interpretation reliability deteriorate
Solution Approach 1:
The patent employs periodic electromagnetic wave transmission with modulation to convey information. The transmitter periodically emits electromagnetic waves that are modulated according to the telemetry data, allowing for reliable wireless communication while maintaining data accuracy through systematic signal encoding.
Solution Approach 2:
The patent utilizes changes in electromagnetic wave parameters (such as frequency, amplitude, or phase) to encode telemetry information. By modulating these parameters in response to measured downhole conditions, the system achieves both wireless communication capability and accurate data transmission.
3Adaptability or versatility
If electromagnetic signals are transmitted through deep boreholes, then monitoring capability in remote locations is improved, but signal attenuation and interference increase
Solution Approach 1:
The patent implements continuous electromagnetic wave transmission through the borehole to maintain constant communication capability. The transmitter continuously generates and the receiver continuously receives electromagnetic waves, ensuring uninterrupted monitoring capability even in deep remote locations.
Solution Approach 2:
The system incorporates feedback mechanisms where the receiver detects electromagnetic waves and sends acknowledgment signals back through the same transmission path. This feedback loop allows for signal quality assessment and adaptive adjustment to maintain reliable communication despite attenuation and interference.
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 monitoring of borehole characteristics by transmitting modulated electromagnetic signals through the borehole, allowing for accurate data interpretation of conditions like temperature and pressure, even in deep, remote locations, with robustness against high temperatures and pressures.
Implementation Method 1
an energy storing circuit element, configured to receive and store energy transmitted through the transmission line
Implementation Method 2
a pulse generator, configured to receive stored energy from the energy storing circuit element and to discharge the energy to generate a pulse of electromagnetic energy
Implementation Method 3
a resonant circuit portion that is configured and arranged to receive energy from the pulse of electromagnetic energy and produce a modulated electromagnetic signal representative of the borehole characteristic
Implementation Method 4
a coupler, configured to couple the modulated electromagnetic signal to the transmission line and to transmit a signal representative of the modulated electromagnetic signal via the transmission line
Data Source
AI summary
A system, method and device may be used to monitor conditions in a borehole. Energy is transmitted to a pulse generator located proximate a position to be interrogated with a sensor. The pulse generator stores the energy, then releases it in a pulse of electromagnetic energy, providing the energy to resonant circuits that incorporate the sensors. The resonant circuits modulate the electromagnetic energy and transmit the modulated energy so that it may be received and processed in order to obtain the desired measurements.