Downhole Ignition Detection Sensor System
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Solution Overview
Problem
Existing ignition devices for downhole fuel sources in wellbore operations lack confirmation of ignition, which can lead to unreliable activation of tools relying on combustion for expansion or operation.
Innovation Solution
A system comprising a tool, a fuel source, a control unit to ignite the fuel source, and an ignition parameter sensor to confirm successful ignition, which can be a pressure sensor, mechanical switch, temperature sensor, ammeter, gas detector, or displacement sensor, providing a signal to the control unit for verification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If remote ignition devices are used to ignite fuel sources in downhole operations, then the fuel source can be ignited, but confirmation of ignition cannot be obtained
Solution Approach 1:
The patent implements feedback by using sensors to detect ignition parameters (such as temperature, pressure, or optical signals) and transmit this information back to the control system. This allows the system to confirm whether ignition has occurred, resolving the contradiction between achieving ignition and obtaining confirmation of ignition.
Solution Approach 2:
The patent introduces intermediary sensors and signal transmission components between the ignition device and the control system. These intermediaries detect the ignition event and convey the information, enabling ignition confirmation without requiring direct observation or complex monitoring of the combustion process itself.
2Reliability
If multiple ignition attempts are made to ensure tool activation, then the probability of successful activation increases, but the time and energy consumption increase
Solution Approach 1:
The feedback mechanism provided by ignition parameter sensors allows the control system to immediately determine whether ignition was successful. This eliminates unnecessary repeated ignition attempts by providing definitive confirmation, thereby reducing the time and energy loss associated with multiple attempts while maintaining high activation reliability.
3Reliability
If ignition parameter sensors are added to confirm ignition, then ignition reliability is improved, but device complexity increases
Solution Approach 1:
The patent uses intermediary sensors that detect ignition parameters and transmit signals to the control system. These sensors serve as simple mediators that add minimal complexity while providing reliable ignition confirmation, effectively resolving the contradiction between improved reliability and increased device complexity.
Solution Approach 2:
The patent replaces complex mechanical monitoring systems with sensor-based detection systems. By using electrical or optical sensors to detect ignition parameters, the system achieves reliable ignition detection with simpler, more compact components compared to traditional mechanical verification methods.
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
Ensures reliable ignition and activation of tools by providing confirmation of fuel source ignition, even in cases of multiple attempts, and simulates a 'cap break' signal for robust ignition, enhancing operational reliability.
Implementation Method 1
Fuel sources are ignited by remote ignition devices... igniting a fuel source associated with the tool via a control unit
Data Source
AI summary
A system and method for confirming ignition of a fuel source in a wellbore. The system includes a tool, a fuel source associated with the tool, a control unit to ignite the fuel source, and a sensor to receive an ignition parameter corresponding to the fuel source. The ignition parameter indicates that ignition of the fuel source has occurred.