Electromagnetic Pulse Level Sensing in Boreholes
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Solution Overview
Problem
Monitoring liquid levels at remote locations within boreholes, such as those used in resource recovery, is challenging due to the impracticality of wired communication systems over long distances, requiring an efficient and reliable method for fluid level measurement and pump control.
Innovation Solution
A system utilizing a pulse generator to emit electromagnetic energy along the wellbore, a detector to receive reflections from the fluid surface, and a processor to analyze these signals to determine fluid levels, with a pump controller adjusting operations based on the measured levels, enabling continuous and real-time monitoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wired communication systems are installed in boreholes for monitoring liquid levels, then measurement reliability is improved, but device complexity and installation difficulty increase significantly
Solution Approach 1:
The patent replaces wired mechanical communication systems with electromagnetic wave-based measurement. The pulse generator sends electromagnetic pulses down the wellbore, and the receiver detects reflected pulses to determine fluid level, eliminating the need for physical wired communication infrastructure in the borehole.
Solution Approach 2:
The patent introduces electromagnetic waves as an intermediary medium to transmit measurement information between the surface equipment and the fluid interface. The electromagnetic pulses serve as carriers that travel through the wellbore environment, reflect off the fluid surface, and return with measurement data without requiring direct physical contact or wired connections.
2Ease of operation
If electromagnetic pulses are used to measure fluid levels in complex wellbore geometries, then ease of operation is improved, but measurement precision deteriorates due to confounding factors like joints and foaming
Solution Approach 1:
The system continuously monitors the reflected electromagnetic pulses and uses the timing and characteristics of these reflections to determine fluid levels. The processor analyzes the returned signals to calculate the distance to the fluid interface, providing real-time feedback that enables continuous monitoring and adjustment of pump operations based on actual fluid conditions.
3Productivity
If continuous monitoring of fluid levels is implemented, then productivity is improved through optimized pump operations, but energy consumption increases
Solution Approach 1:
The system uses periodic pulse generation to monitor fluid levels at regular intervals rather than continuous transmission. The pulse generator emits electromagnetic pulses at predetermined time intervals, and the processor analyzes these periodic measurements to determine when pump operation adjustments are needed, reducing overall energy consumption while maintaining effective monitoring.
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 system allows for accurate and real-time measurement of fluid levels, preventing pumps from running dry while minimizing counterproductive pressure, effectively managing fluid levels in boreholes, even in complex geometries and environments with confounding factors like joints and foaming.
Implementation Method 1
a pulse generator, positionable and operable to generate a pulse of electromagnetic energy to propagate along the wellbore towards a surface of the fluid
Implementation Method 2
a detector, positionable and operable to detect a portion of the electromagnetic pulse reflected from the surface of the fluid
Data Source
AI summary
A system, method and device may be used to monitor fluid levels in a borehole. The system includes a pulse generator to generate a pulse of electromagnetic energy to propagate along the wellbore towards a surface of the fluid, a detector to detect a portion of the electromagnetic pulse reflected from the surface of the fluid and propagated along the wellbore towards the detector, a processor to analyze detected signals to determine a level of the surface of the fluid. In an embodiment, the system includes a pump controller to control the operation of a pump located in the wellbore based on the fluid surface level.