Downhole Temperature Sensor Correction for Polarity Reversals
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Solution Overview
Problem
Existing submersible pumping systems face challenges in accurately determining and correcting downhole temperature measurements due to potential incorrect connections between temperature sensors and sensor modules, which can lead to erroneous readings and unnecessary system retrieval.
Innovation Solution
A method and system that utilize an analog-to-digital converter (ADC) to convert temperature signals from motor temperature sensors into digital signals, which are then processed to determine the absolute value and correct any polarity reversals, ensuring accurate temperature reporting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If temperature sensor leads are connected in the field to the sensor module, then temperature measurements can be obtained, but incorrect connections may occur leading to erroneous readings
Solution Approach 1:
The system performs preliminary testing of the temperature sensor leads and connectors before final installation. The processor detects the presence of leads in the sensor module and verifies proper connection polarity, allowing incorrect connections to be identified and corrected before the pumping system is deployed into the wellbore.
Solution Approach 2:
The system provides feedback signals to indicate whether the temperature sensor leads are properly connected. The processor monitors the sensor module connections and generates indicators that show correct or incorrect lead connections, enabling operators to identify and correct polarity reversals without needing to visually inspect the connections in difficult lighting conditions.
2Ease of operation
If leads from temperature sensor are unintentionally reversed, then the output signal can be reversed or absent, but visual identification of polarity is difficult in remote environments
Solution Approach 1:
The system performs self-identification of lead polarity and connection status automatically. The processor detects which leads are present in the sensor module and determines their polarity without requiring visual identification by the operator. This eliminates the difficulty of manually identifying polarity in remote environments with poor lighting.
Solution Approach 2:
The system uses visual indicators that change or activate to show the polarity status of connections. Different indicators can be activated to show correct versus incorrect connections, making it easier for operators to identify proper lead connections without relying on visual identification of polarity markings in difficult lighting conditions.
3Reliability
If erroneous temperature measurements are obtained, then the operator may pull the pumping system to correct the faulty connection, but this causes unnecessary system retrieval and loss of time
Solution Approach 1:
The system performs preliminary verification of sensor lead connections before final installation and operation. By testing and validating connections in advance, the system prevents erroneous temperature measurements from occurring in the first place, eliminating the need for subsequent system retrieval to correct connection errors.
Solution Approach 2:
The system provides immediate feedback on connection correctness before the pumping system is put into operation. This allows operators to correct any connection errors while everything is still accessible, preventing erroneous measurements that would trigger unnecessary system retrieval and time loss.
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
The solution effectively identifies and corrects improperly connected temperature sensors, providing accurate temperature measurements and reducing the need for unnecessary system retrieval, thus enhancing operational efficiency and reliability.
Implementation Method 1
converting the analog motor temperature signal to a digital motor temperature signal using an analog-to-digital converter (ADC)
Data Source
AI summary
A method for measuring the temperature of a submersible pumping system motor includes the steps of obtaining an analog motor temperature signal from a motor temperature sensor, converting the analog motor temperature signal to a digital motor temperature signal using an analog-to-digital converter (ADC), providing the digital motor temperature signal to a processor, determining the absolute value of the digital motor temperature signal with the processor to produce a corrected digital motor temperature signal, and reporting the corrected digital motor temperature signal. The method is designed to correct the measurements made by the motor temperature sensor in the event the motor temperature sensor is connected incorrectly.